general-chat

[tardy badger]

My level, L2, you can get the role with a 2 year degree and 4+ years of experience

[dusty citrus]

So you’re saying the title of engineer should only be reserved for those who have formal educations and stamps?

Or where does one draw the line. Are engineering technology degrees considered engineers?

[tardy badger]

Me personally, not every engineering role should be gate kept

[ebon dew]

i'm not saying there shouldn't be equivalent experience but the title still needs to be accredited or verified somehow, that's what honorary degrees are for.

you can't just say well i've been working as an engineer for 10 years so i am one. well yes, and no.

[stray glade]

engineer: One who operates an engine
🎓 i see i am an engineer

[tardy badger]

There are some jobs where you really need a solid foundation in physics and mathematics to do. Like civil engineering, mechanical engineering, and electrical engineering. If you’re designing stuff that has near unlimited potential to destroy or harm lives, yeah definitely.

[dusty citrus]

Stationary operating engineers of huge boilers would like to agree.

Oh also train engineers

[tardy badger]

But software definitely shouldn’t be held to that same standard in general. Unless it’s like for self driving software

If you’re just developing poker games for iPhone users, there’s no need to restrict people calling themselves engineers.

[stray glade]

why do train drivers never get a degree
cuz they never finish their train-ing

[tardy badger]

Though poker is addictive so maybe that has unlimited potential for danger

Might be a bad example 🤔

[ebon dew]

not having accreditation isn't gate keeping... it's the agreed upon system of standards. yes it costs money to go down that road but then that's financial gate keeping not ambition stopping you.

[static flare]

I do poker for the maths 😎

[tardy badger]

Be careful. Maths is dangerous, it might lead to drinking and deriving

[ebon dew]

lol

[static flare]

Fun fact: I never learned calculus

[tardy badger]

Fun fact: I took all the way to vector calculus but I’ve not used it once in my day job

🙂

[static flare]

My brother is big on calculus, and I'm a high school dropout

[tardy badger]

Dripout lol

[static flare]

shush

[tardy badger]

Like a fine cup of coffee, you slowly escaped high school

[dusty citrus]

You’re my new favorite

[solar kindle]

For 2 brief, glorious seconds: "dripout". 💔

[ebon dew]

there are some classes that you really will never use. do i need to know all the parts of an amoeba to route traces on a pcb or fix someone's email?

[tardy badger]

I’m now going to call dropping out of high school/college et al. Dripping out.

Because you don’t make the decision suddenly, but over time

[dusty citrus]

It’s interesting seeing this conversation in a software mindset

[static flare]

Nowadays I just learn what I want from YouTube videos and ADHD fuelled Wikipedia rabbitholes

[tardy badger]

Hello hyperfocus

Meet caffeine and an auto play YouTube list on topic X

[static flare]

caffeine doesn't really do much for me

[tardy badger]

I figured

Caffeine mellows certain kinds of adhd

My brother for instance could drink an energy drink and still fall asleep

[ebon dew]

i've been downing redbull and monster for the past 2 weeks. honestly got more done in the past 2 weeks than the entirety of my time since installing circuit python. 😛

[static flare]

I drink energy drinks for the flavour mostly

[ebon dew]

actually had my first monster yesterday, horrible tasting compared to redbull.

[tardy badger]

I drink coffee for the warmth

[static flare]

I drink a regional exclusive energy drink

[ebon dew]

it is pumpkin spice season and i do enjoy those

[tardy badger]

Though my body is addicted to caffeine so viva la headaches

[ebon dew]

staring at a monitor all day doesn't help

[tardy badger]

No

And I do that most days

But I get paid $50/hr to do so. Headaches it is

[ebon dew]

what's the drink called? regional exclusive sounds so posh. almost like a local microbrew.

[tardy badger]

If it’s coffee based, it might be a microbrew

[ebon dew]

during hurricanes the local breweries around here start making bottled water. they ship it to affected areas. there are some neat things that happen after hurricanes.

[tardy badger]

Yeah, pretty cool

[static flare]

V

[ebon dew]

nice design, looks tasty. monster can is black which is more like a mystery flavor.

[wispy heron]

I think I’m on my third monster today. Drank one of them right before I took a nap.

[static flare]

Not a huge fan of Monster myself

[wispy heron]

I’m not picky

[static flare]

I'm very sensitive to the taste of artificial sweeteners myself

[wispy heron]

Bang is prolly my fav though. They have one that tastes like cotton candy.

[hasty wedge]

Random stuff: saw this pic in a chat group and someone said:"why a shark girl have cat ears?"

And I said: there's already an octopus dude with cat ears

[stray glade]

why octopus with cat ears have human face

[wanton thistle]

So I seller on Aliexpress is trying to extort me for more money. I paid and bought a few items a few days ago. Then they message me saying the price went up because the price was wrong on the website 🤔 So they want me to either pay $3 or reduce the amount I bought. 🤔

...I dont think they can do that.

[gusty torrent]

Ignoring them is usually the best course of action

They'll either:
a) ship it
b) cancel the order
c) do nothing but mark it shipped, need to dispute it once the time runs out

b and c reflect badly on their ratings, which results in lower product placement on searches.

[wanton thistle]

Ah poo. I responsed and said "I would like it for that price since the order is paid"

They are the only seller I found with the stuff I needed 😭 and I was going to recommend them too. But it looks like they fixed the price. Sorry bub, I bought it for half off. Your problem, not mine

[gusty torrent]

Basically you're only out time, there's no loss really unless you forget to file the dispute or you need something on a deadline, in which case you're probably not ordering it off aliexpress in the first place.

[wanton thistle]

Yeap and Ive found sellers are pretty good about giving money back. So, I dont need it asap 🙂 It was more for "Hey I want to mess around with a bunch of modules one day"

[gusty torrent]

I'm stocked up on most boards I need for the near future, just got a whole pile of Lolin S2 Minis and VCC-GND YD-RP2040 boards

I use the VCC-GND boards in my macro keypad now, since mostly pin-compatible with pi pico and has USB-C.

[wanton thistle]

they are a bunch of RF wireless modules. I wanted to experiment with things other than the usual

I like the small ASK modules because, well, they are small. I dont feel like writing a library if all I need to do is send a few byte of data. For my particular family or microcontrollers, I dont have easy to go to libraries written for the NRF series thats popular.

I wonder if I should name the seller on ali 🤔

[late fulcrum]

ASK and OOK modules are pretty common, I'm surprised you aren't finding any other sellers, unless there's a specific feature you need.

[tardy badger]

One thing that baffles me with places like Florida and the eastern coast of the US is most of it gets severely flooded during major coastal storms, yet people still are willing to spend hundreds of thousands, if not millions to have a piece of property that could be wiped off the map if a strong enough storm hit.

[crystal ore]

You're more of an earthquake guy instead? 😉

[tardy badger]

They are statistically less likes, so yes lol

[late fulcrum]

Having lived through dozens of hurricanes, a couple of tornados, a couple of earthquakes, an eruption, and a few wildfires, I'll take the hurricanes.

[tardy badger]

Hurricanes inland in mountainous areas are fine

But living at a beach house that could be gone with one strong category 1 storm, no thanks

[tardy badger]

By eruption, I imagine you mean Mount St. Helens?

[late fulcrum]

No, Hawai'i 🙂

[tardy badger]

Kailua is almost nearly active all the time. Lol

Sometimes more active than other moments

[late fulcrum]

And that was considered a mild eruption. I want no part of it. The locals just shrug, paint a yellow stripe on the fresh lava, and it's the new paved road.

[tardy badger]

I live in Utah. The biggest threat to property here is Mormons 🙂

[late fulcrum]

The beach house is like a cinderblock fort, it laughs at cat 1 storms, but an earthquake would demolish it utterly.

[wanton thistle]

Sort of. They are all variations of the common 433Mhz modules, some look more Advanced than others though. I kind of wanted to try them all out is all.

[tardy badger]

I’ve lived in florida, North Carolina, South Carolina, Tennessee, and Wyoming

Hurricanes are fun until they are not.

[tardy badger]

Sure, but statistically your house will be demolished once by an earthquake in your life, whereas a hurricane could wipe it out at least once a year

[late fulcrum]

Hoo boy, bad statistics detected!

[tardy badger]

Not really

In the US, how much damage has an earthquake done each year?

In real dollar value

Compare it to hurricanes and my case rests

[late fulcrum]

Oh, so many objections. Dollar value? That's not a useful metric.

[tardy badger]

FEMA says 6.1B in damage annually by earthquakes

Hurricanes cause nearly $150B in damage in the US annually according to NOAA

Dollar value is a great metric if we’re talking about Home destruction

[late fulcrum]

For example, using that logic you could argue that it's cheaper to operate a Rolls Royce than a Toyota, as people spend $20M/year maintaining Rolls cars, and $2000M/year maintaining Toyotas.

[tardy badger]

Statistically you’re nearly twice as likely to die in a hurricane (1:68k) vs an earthquake (1:123k)

[late fulcrum]

That, at least, is a more useful metric as it's more personal (life or death), and it's per capita.

However, it doesn't account for population distributions.

[crystal ore]

People laughed when I tiled my roof with four-inch armor plating, but when the asteroid impact comes, I'll be ready!

[tardy badger]

University of Washington claims only 20 people die from earthquakes in the US per year, and there’s only been one recorded instance of more than 200 people dying from an earthquake in US history

An average of 800 people die each year to hurricanes making them the deadliest natural disaster in the US

Sorry not university of Washington, University of California

https://www.ucpress.edu/blog/30913/hurricanes-versus-earthquakes-how-natural-disasters-compare-between-florida-and-california/

Anyway, I only mention Florida because there’s an article stating that people are flocking to Florida to buy hurricane damaged property

And it doesn’t make much sense to me because a ton of property in Florida was swept out to sea with this last hurricane that it

[hasty wedge]

This is GitHub's mascot

[stray glade]

yes i kno

[dusty citrus]

https://tenor.com/view/conspiracy-theory-gif-10587157

[oak abyss]

hey

I bought an ESP-32S last time I was in thailand. I did not really need it but i tought. cool. maube i can use it to make a wireless geiger counter... connecting it to a PC I do not hear any ding sound and the device manager does not update.. is this thing dead ?

or do i need to do someting the very first time ?

[left solstice]

Adafruit talk will start in about 1h at Espressif DevCon22

https://youtu.be/8l29cTFS27w

[ancient rivet]

what specific breakout board are you using? can you link to a product page?

[oak abyss]

Esp-32S

it turns on and shows red light, but it seems not to connect to my computer through usb

[ancient rivet]

what ESP-32S based product are you using? "ESP-32S" isn't specific enough.

[oak abyss]

it says ESP-WROOM-32

I have actually never really tested this platform before so abit unsure how it works

I do have a few programmers around here both 5 and 3.3 volts, maybe it needs to be flashed =

[ancient rivet]

is it just the bare module?

[oak abyss]

there are pins out, chips light after i connect to usb

[ancient rivet]

if there's a USB connector, must be a dev board of some kind

[oak abyss]

it looks like this

[ancient rivet]

ah. ok. yah. a dev board.

[oak abyss]

yeah, but nothing happens when I connect to usb on the computer.. I don't get any comport

and no gong sound played

[ancient rivet]

the WROOM module is just this part

[oak abyss]

so i just wonder if it is just dead, DOA or if there is something I can do make it working

[ancient rivet]

typically there's a USB to serial converter chip that goes between the module and the PC's USB port

that's what your PC's USB sees from its end

some of those require driver installation

[oak abyss]

but then it should be showed up as unknown device

[ancient rivet]

any chance you're using a charge only USB cable?

[oak abyss]

yes, used this cable for multiple other purposes, but i think i found the culprit sort of

the port I used was a usb 3.0 port

tried a 2.0 and it seems to found it

[ancient rivet]

huh, would've thought 3.0 would be ok. but at least its showing up now.

[oak abyss]

yeah, that was weird, but i guess my mainboard is not the latest one. it starting to age... asrock x299 tai chi

seems it running on 115200 baud, snce i got a bunch of text in the serial monitor

[ancient rivet]

yep. that's default for the ROM bootloader output.

[oak abyss]

does this have circuitpython or can I flash this ?

[ancient rivet]

i'd assume it has nothing

supported circuitpython boards are here:
https://circuitpython.org/downloads

[shadow siren]

I don't thing that esp dev board can have circuitpython, I have dozen or more of that board and varients, Ardunio or ESP-IDF only

[oak abyss]

i think i flashed some lolin boards long time ago with circuit python

[shadow siren]

I have some lolins also differnt esp I think

not at home so cannot check

There are many ESP variants out there

[ancient rivet]

that board lacks "native USB", which in general means no CP support - however support for some serial only boards is starting to be added with CP 8.x

[oak abyss]

this was just a random purchase in a retail shop, so i did not really have any plans.. but just figured that it could be fun to test

[ancient rivet]

this covers the general process for currently supported boards:
https://learn.adafruit.com/circuitpython-with-esp32-quick-start

[oak abyss]

thanks 🙂

[shadow siren]

yeah looking forward to those esp boards getting the CP added via serial connection vs USB.

web workflow I believe they are calling it

[edgy apex]

the t-mobile network was filtering out the food pantry a2p traffic from our ordering system for the last few weeks. I contacted Twilio last Sunday for help who were the ones who told me it was t-mobile. They escalated my support ticket all the way up after they found out we were nonprofit and what we are using it for. longer story short everything is working again 🙌

[dusty citrus]

not really in topic
but anything like WordPress but free?
I mean WordPress is free but usefull plugins are not, such as woocommerce or using stripe via a gui plugin

I can code but using a gui like interface is way easier

[wispy heron]

I like Django. It’s written in python, and most of its plugins are free. There are pay plugins for Django, but overall it’s community embraces open source concepts more than Wordpress. Wagtail plugin on top django is useful. It’s more diy than Wordpress, but more flexible and more powerful.

[tropic urchin]

Great presentation at Espressif DevCon22, @viscid folio. More questions I have not specific to ESP32 I'd be glad for any Adafruit peeps to answer:

• Any estimates on the QT Py ESP32-S3 being available through Mouser.ca?
• What's the best approach for the home user to solder on an SWD connector to the STM32F405 Feather? I tried yesterday and made a mess... 0.05 pitch is a pain in the arse.
• Relatedly, is there a better fix for getting into the bootloader on the STM32F405 than the "touch the capacitors" approach? Has this problem been narrowed down?

[topaz juniper]

Does anyone know a good place to ask for a tutor for a specific tech topic (PCB design)? I've asked the local makerspace and no one replied. Not sure the Adafruit jobs board is the best place.

[thick wind]

If you’re willing to pay for something specific like that, you could look on something like Fiverr or skillshare?

[tardy badger]

Adafruit jobs board is a great place to post that you’re looking for help

It’s free

[tardy badger]

Alternatively, you could probably find some tutorial videos on YouTube and the. Come to #help-with-hw-design with your questions along the way

There are even some fairly inexpensive Udemy courses on the topic as well.

For YouTube videos, I definitely recommend Shawn Hymel

He did a series on designing your own RP2040 dev board

[shadow siren]

For website stuff you could go Joomla or even google web pages which are part of the google personal or google workplace stuff

[tardy badger]

https://youtu.be/kcwvuwetgEQ

There’s the RP2040 video. He mentions there are a few videos like his introduction to KiCAD

[ebon dew]

@tropic urchin recommend you show up for the ask an engineer live stream tonight at 8pm EST. ask your question at anytime during the ask an engineer session. they curate them during the broadcast and answer all questions at the end of the show.

Show & Tell - 7:30pm ET Wednesdays
Ask an Engineer - 8pm ET Wednesdays

though asking about stocking questions they might not have a direct answer for but it'll at least put your interest in it within their scope, which is a good thing too.

[stray wind]

We definitely do not have answers to stocking questions. If it's regarding the Adafruit shop, we suggest signing up to be notified. Otherwise, for stock elsewhere, we have no idea.

[ebon dew]

well there ya go

you'd be better off shooting an email to mouser.ca to ask that one. they're the ones that procure the parts for their own store. 😉

[wanton thistle]

Replying to myself is weird. But looking through the seller and they raised the prices of ALL the stuff I wanted to order. I have a feeling my order probably wont get sent out so I may request a refund. It was a big order too! $66!

On the plus side, it looks like LCSC actually has some of the same modules I wanted 🤔

[dusty citrus]

I think that’s the issue though if you’re an international person. At least I’d assume that’s why they said that? In hopes it’d be picked up

[night crescent]

WE ARE LIVE! SHOW AND TELL! https://youtu.be/HR6Xii9Cgrg

[night crescent]

ASK AN ENGINEER 10/19/2022 LIVE! https://youtu.be/jVrKcTDsvKc

[tardy badger]

If there’s anyone here looking for a new senior embedded engineering role, FormLabs is hiring a hybrid senior embedded engineer out of their Somerville, MA office

I was contacted about it, they’ll pay relocation costs to for the right candidate. I can’t take it because my wife just took a new job that she loves

[wanton thistle]

It looks like they have a bunch of openings

[tardy badger]

Yeah

I’ve been trying to figure out how they got the particular email they contacted me at. It’s one I haven’t used in years lol..

[wanton thistle]

Also Legoland is there

[tardy badger]

Unless they had my resume saved from Indeed

[wanton thistle]

Its probably that.

[tardy badger]

Yeah

Though I made my resume private a few months ago. The job market is cooling down and lots of places are cutting back engineering staff

I’ll stay safe in my current role and maybe venture out when things start looking up

Unless I get laid off of course.

Which would be the second time I’m this economy if that happened

Luckily my team does good numbers in terms of revenue for the company, not very much overhead charging.

[wanton thistle]

👀

same

Its sort of been slow on the engineering side a bit now

It feels odd that some days I go into work with nothing to do

and feel guilty about it

[hasty wedge]

I was playing with AI generated images

(Tech related off topics)

Installed Linux Mint on a new SSD just for this(and also try out Team Group's SSD)

Because AMD ROCm doesn't support Windows

Wondering what will Intel do with their Arc GPU

[tardy badger]

Sell them?

[hasty wedge]

Like machine learning

Nvidia have their closed source CUDA

AMD have their open source ROCm

How about Intel?

[tardy badger]

Oh, not sure. They do some AI/ML stuff but I don’t know if they brought it to their GPU

[hasty wedge]

RN it feels like Intel is like gaming and gaming only

[dusty citrus]

it should be able to use onepi
or at least so it was shown on SIGGRAPH 2022
dunno if they have specific gpu libraries for ai/ml on gpu though

anyway this is dumb
but why is that compute modules (be raspberry or any other companies like toradax or octavo) are so cheap compared to the board with io Ports?
even if the stuff is pretty much the same as their sbc counterparts?

[tardy badger]

Not having a discussion on this, but a while ago somebody mentioned Liz Truss would last a month in office. You were close, 45 days lol.

Hats off for a pretty good prediction

I’d like to know your prediction for the next World Cup

[rapid geode]

she didnt last as long as the lettuce

[tardy badger]

Lettuce for PM

[burnt tendon]

Oh yeah, I started my new job a few weeks before she started.

So, like... I was just thinking last night that I'd not been here very long at all and I'd somehow inflated my length of tenure in my head, but I guess it's going to be at least two UK prime ministerships.

[tardy badger]

😂

[zinc plank]

sup. new here. im trying to learn eagle, and basically fiddling with a little expansion board that includes an i2c multiplexer, 2 x 16 bit ADS's, and a 16 channel pwm

basically i want to make it "hattable" so that on my main unit, it can plug straight into my pi, and provide inputs and outputs. then from one of the outputs id send a cable to another pi case that only has another one of these boards (no pi), as an "expansion module"

concerns have been raised regarding i2c cable length etc.... and so people suggested i fold this into the mix: https://www.adafruit.com/product/4756

my question is, can i put one of those on each i2c port on the board?

or can you only run 1 LTC4311 per bus or what

[stray wind]

Welcome! You'll get the best assistance in #help-with-hw-design. We discourage cross-posting, but for new folks who need guidance to the proper channel, it's perfectly fine. Feel free to post your question there instead, if you'd like!

[zinc plank]

ok will head over there. thanks

lotta chans, wasnt quite sure the best to ask in

[stray wind]

No worries! This is a perfect place to start if you're unsure.

Always best to simply ask, and we can help you find the right place if indeed there is one.

[pure magnet]

Wondering if @stray wind has hacked my phone, or my brain? Just recv'd and saw your HW channel recommendation just before hitting send to spam this channel with a hardware question.

Thank you for the guidance and helping prevent me from spamming this channel 😀

[stray wind]

You're entirely welcome! Glad I could help without realising it!

[wanton thistle]

Just out of curiosity, has anyone ordered from LCSC before?

[dusty citrus]

yes? I'm all ears

anyway does someone know electronics contests but that don't require to be a student in x facilities?
like
https://www.digikey.it/en/resources/social/back2school

actually this one does require an edu mail, you can get it in other ways, but I doubt it would be that lecit

[wanton thistle]

How did shipping go? Thats pretty much my only question

[dusty citrus]

fine

[wanton thistle]

Usually hackaday runs contests

[devout dagger]

With open source, what is the proper way of giving credit when I take other's programs and make them into something of my own? Is there a specific way?

[hard estuary]

I typically have a comment or docstring at the top of my code, for example

"""Based on AUDIO SPECTRUM LIGHT SHOW for Adafruit EyeLights (LED Glasses + Driver). 
From https://github.com/adafruit/Adafruit_Learning_System_Guides/blob/main/EyeLights_Audio_Spectrum/code.py 
"""

It's a great question

[finite monolith]

https://www.adafruit.com/product/5637
Sweet, I've been ruminating on trying to create this but for the reverse use case: talking with 80s 5V devices from a modern 3.3V MCU. My Atari 2600 needs Bluetooth gamepad support

[static flare]

if you need bidirectional use, Adafruit has those as well

[finite monolith]

I'm planning on having an i2c GPIO expander running at 5V

[thick wind]

I2C is bidirectional by nature of the bus, this one just provides 3.3v power in one direction. As long as the 5v device has its own power, it should work fine.

Truth be told, I had to think about it for a moment myself…

[crystal ore]

Haha, an excellent 2600 upgrade! 😁

[finite monolith]

also the Osbone1 needs to be able to use it's keyboard now that I've made it a Bluetooth device as well. Gotta hack the BLE Central HID code as it doesn't exist yet

[weary fiber]

I am EXTREMELY stuck on this circuits lab problem

inverse laplace is stinky

[static flare]

Congrats!

[tepid goblet]

o7

[frigid tiger]

Congratulations

[thick wind]

Finally got around to mounting a pi on my 3d printer. Gotta get a longer wire to the IoT relay controlling it, though…

[tardy badger]

Looks good

[rapid geode]

is there a pre existing board that can take in a 4 pin pwm fan signal, let you override the speed, then output a new 4 pin pwm fan signal?

or, could the smallest adafruit mcu do it?

it needs to be powered by the 4 pin connector as well

(and in like speed adjuster basically)

hm. is there anything even smaller than the trinket m0?

[thick wind]

The smallest mcu from adafruit would be the trinket, but for this you may want the attiny85 for its 5V logic instead of the m0. If you do that, you’ll also have to add a voltage regulator to step the 12v down to 5v, in addition to possibly a couple of other passives to properly read and/or simulate tachometer output.

[rapid geode]

the attiny seems to have a note about usb issues.

[thick wind]

Oh, are you using usb?

[rapid geode]

only to program

oh, are the issues for live usage?

[thick wind]

No it’s a problem for newer computers across the board. If you have an older computer or an older usb1.1/2.0 hub you should be okay.

[rapid geode]

ahh

hm

i had one somewhere, but i vaguely recall giving it to a friend

so thats one option. option 2 is to make somethign custom, but i doubt i can do that for $6 in low volumes of 100pc

[thick wind]

How small does it need to be?

[rapid geode]

as small as possibe. sec, ill show a drawing

[thick wind]

I think the ideal board for this would probably be dfrobot’s original beetle with the 32u4. 5v logic will save you a lot of headache for this kind of fan control haha

[rapid geode]

trinket size on the left. needs to fit in the blue area. trinket is too wide to sit vertically.

the beetle is larger than the trinket i think

[thick wind]

Yeah, 27x15.3mm vs 20x22

Would a qtpy fit?

[rapid geode]

still wider

but shorter

[thick wind]

Hm

What if you use a bare chip instead? Probably a lot more options for that space.

[rapid geode]

well thats custom pcb then. im trying to avoid that at least for now

if i knew i was making thousands thats a no brainer

[thick wind]

I was thinking perfboard design with an attiny, actually.

[rapid geode]

even worse haha. this is a product for sale, and this controller is a zero value addition. every dollar spent is lost profits.

hm

doesnt seem like i have much choices though

[thick wind]

Wait, the blue frame is readymade?

What product is that?

[rapid geode]

no its something i am making to sell

but its heavily sized constrained

[thick wind]

Oh is it just laser-cut or something

[rapid geode]

cnc'd

[thick wind]

Hm.

[rapid geode]

yeah. the fans are 1mm tall. so a custom one id just make 10.5mm wide and 30mm long with only the connectors i need

but thats $$ for only 100 pc

[thick wind]

Yeah you can’t really get smaller than a qtpy or trinket, and with the addition of a dc converter, custom is the way to go here…

[rapid geode]

5v in 5v out. if i use a 5v chip then no converter but thats getting rare

[thick wind]

You COULD potentially perfboard an attiny with a dc converter and two headers, but making it look pretty might be tough, even with a nice permaproto.

Well you still need power for a 12v line.

[rapid geode]

no 12v involved

5v fan, 5v source

[thick wind]

These aren’t 4-pin pc fans?

Oh

Ohhhhhh

[rapid geode]

pc fans yes, but 5v

[thick wind]

I thought pc fans were 12v across the board

[rapid geode]

so did i

ha

[thick wind]

Did not know 5v fans were a thing.

[rapid geode]

https://noctua.at/en/products/fan/nf-f12-5v

like so, but 40mm

(side note, noctua fans are awesome)

[thick wind]

Yeah I got nothing.

[rapid geode]

so yeah, no converters. i need (power in power out), to read the pwm. to make a new pwm. and to read a potentiometer (dial for adjusting, digital or analogue)

so the trinket 5v should work. but i dont want users who want to hack it to complain about usb.

[late fulcrum]

You don't really need to make a custom board, just an ATtiny10 and one of these: https://www.sparkfun.com/products/717

[rapid geode]

that wont be enough pins hmm

hmmm

maybe it is

[late fulcrum]

I thought you just need power, ground, PWM in and PWM out?

[rapid geode]

yeah

but, also there no usb on there

😛

[late fulcrum]

Note that AdaFruit also offers SOT23-6 adapter boards, but as part of an adapter board assortment (product ID 1230)

[rapid geode]

but you might be on the right track. maybe something i can heat shrink right into a cable harness

[thick wind]

Yeah if there no voltage regulator either, you could definitely do that. There should be external programmers available, and you could probably perfboard a programmer for them without too much trouble?

[rapid geode]

i want the user to have easy hackability

[umbral phoenix]

Servers really have the life... just sitting around waiting for a friend to stop by.

[burnt tendon]

tl;dr: AdaFruit sells some long SOT after adapter boards.

[crystal ore]

Yes, so I see...

[dire viper]

I'm watching the New Products

Is that flash chip the same size/pin that could fit on a QTPy?

The SOIC

[dusty citrus]

our isps have a pretty weird marketing, seeing "exclusive contents", clicking it out of curiosity: "you can see for free macio verse series "
alright 🤨

[finite monolith]

FYI, the 4-pin PWM signal can be driven from 3.3V just fine, you just need to get the PWM frequency right or some of fans might complain. The higher voltage motor voltage can be directly connected and not touch the MCU at all. The incoming PWM might be 5V but I think it's supposed to be an open-drain an you can pull it up with whatever voltage you like

[devout dagger]

Thanks for the reply back and the great example, Paul

[sick adder]

by the way the candybar DOOM source code is live on github: https://github.com/adafruit/esp32-s3-boy_fw -- inside the candy bar is an Adafruit ESP32-S3 TFT Feather https://twitter.com/adafruit/status/1583466594235125761

adafruit industries (@adafruit)

PARENTS: please carefully inspect your kids’ Halloween candy! We found Doom running inside this Milky Way bar.

Candy of Doom - Do not eat if it's turing complete

#adafruit
#halloween
#candy
#doom

Likes

741

Retweets

284

▶ Play video

Twitter · Oct 21, 2022, 2:33 PM

[finite monolith]

I think so, 8-SOIC should be the same between them

[rapid geode]

Board still needs to be powered by the 5v supply on the fan line.

i forgot we also need 2 more pins for speed sensing

i freed up more space under the plate (as opposed to on top. for a 3d printed mount for a pcb like the trinket

if i use the m0 trinket then users can drop in circuitpython code instead of using an ide like arduino. but, can i attach 5v. obviously the usb itself is 5v.

[late fulcrum]

The M0 is a 3.3V MCU

[rapid geode]

yes. but.. it seems (if im not reading wrong) the BAT pin can be up to 6v

so i might be fine

[late fulcrum]

Yes, it has an onboard 3.3V regulator, but the signals in and out of it are 3.3V. Which may be fine (as explained above)

[rapid geode]

oh, right yes, signals.

hmm

one way to find ot ha

i have a feather m0 here somewhere

i think what that says is it can work on 3.3

or im dumb

ha

tacho is probably 5v too. although it does not specify.

hmmmm

bleh. i think too sketchy of a solution

[late fulcrum]

I think someone said the tach signal was open drain, so if you pull it up to your logic voltage, it should be fine. However, I don't know if that's the case, might be worth measuring some stuff.

[rapid geode]

hm

it needs to also recreate a tacho signal to feed back

hm

hmm

[late fulcrum]

Right. You can basically bit-bang an open-drain signal by setting the output low and switching between output (driving low) and input (floating) mode.

[rapid geode]

oh

so maybe still wroth testing

on my feather

actually, i have a clue on my desk here. would that also behave the same?

[late fulcrum]

I don't know offhand, but many MCUs operate similarly. I just don't remember which MCU is on a Clue.

[rapid geode]

m4

no

nrf52

duh

[rapid geode]

i see some suggestion the noctua fan will just run straight up at 3.3v. im just going to order a qtpy m0 and see is i can use the stemma conenctor for easy output.

[late fulcrum]

I'm not sure the QtPy regulator can deliver enough current to power a fan.

[tardy badger]

Yeah, not sure 600mA is enough

Especially if you’re doing other things

Probably need 750mA minimum

[rapid geode]

the fans are 50ma

[tardy badger]

Neat, I figured they’d want more

[rapid geode]

yeah, but thats one of their brand points i guess, efficiency and low noise

so 100ma total

also spins slow. a 40mm sanyo fan is 230ma, but also 16000rpm

and 47db vs 18

[rapid geode]

i got sidetracked. 3d printed ac/heat registers that instal seamless with the drywall

just barely fit my printer by a few mm

i have my space heater on full power and put a piece of abs right in front of it. we'll see if it deforms

"real world testing"

haha

[tardy badger]

Pizza night

[rapid geode]

oooh

gimme

vent aimed downward a bit. should work

[violet parcel]

where's the electronics? 😄

[rapid geode]

you havent seen the new pizza pi micro controller?

[tardy badger]

I used an electric oven lol

[violet parcel]

*chip-shaped salami

[whole jacinth]

heh, maybe got an 8-bit PID controller in there

[tardy badger]

Probably does, it’s a newer oven

[violet parcel]

You guys ever wake up after the weekend on mondays and feel like going back to sleep for 500 years without aging and being woken like in the 37s episode ?

Almost every monday here then I know I have to go to work etc and I give up after 10 mins 😦

and then on the weekend I'm like EXCUSE ME WAKE UP U HAVE ELECTRONICS TO DO

Also I'm so sick of clear plastic boxes, been looking for opaque ones for months now as a prototyping enclosure 😦

staples used to sell opaque pencil box but now they are all clear....

[crystal ore]

"Oh thank goodness the revival succeeded! We've got a bit of trouble with a very legacy system, and you were listed as an embedded engineer. Tell me, do you know what a P-I-C is?"

[violet parcel]

I mean I had surgery when I was 6yo and to this day I still don't believe they made me sleep for 10 hours. Part of me still suspect they just manually winded the clock in the room because it fell like a couple of seconds to me

so I doubt I'd believe something that told me I slept for 500 years 🤣

[rapid geode]

sadly they dont seem to. theres a guy on youtube (alex) that mae a PID pizza oven from a regular one.

[swift ferry]

I'd like to 3D print a case for my NeoKey 1x4 QT board. Does anyone know of a model for one?

[rapid geode]

learn to model your own 🙂

(sorry, dont know anything about that board)

[swift ferry]

Ha, I'm just trying to save some time.

[tardy badger]

Adafruit publishes all their models on GitHub that they use on 3D Hangouts

https://github.com/adafruit/Adafruit_CAD_Parts

There’s a chance what your looking for is in there

https://github.com/adafruit/Adafruit_CAD_Parts/tree/main/4980 NeoKey 1x4 QT

[rapid geode]

Sooo, PCBway has seemingly cheap metal 3d printing. anyone every try them?

[ebon dew]

no but it did catch my eye. some of the 3d printing stuff china is doing lately is tempting. chrome plated 3D parts, tempting.

[rapid geode]

small aluminium and stainless parts a $5-$20 (min order seems to be $45 so you need multiples for best value)

my bike frame idea is still a bit too much, but nowhere near as crazy as the other suppliers

[burnt tendon]

Iiiinteresting

[rapid geode]

indeed

im redesigning one one my products for printing now to see if it is viable

[blissful roost]

Waiting on delivery update for motherboard and RAM be like 😐

[rapid geode]

mmm new toys

hehe

so, it is $115cdn for 10 bike derailleur hangers 3d printed and bead blasted and shipped in 2 weeks.

vs $50cdn for one off the shelf cnc one

very interesting.....

[blissful roost]

Got my CPU yesterday, cooler today.

PSU should arrive on Tuesday.

[rapid geode]

a6000?

[blissful roost]

Ryzen 5600x

[rapid geode]

ah nice

[blissful roost]

😁

[rapid geode]

i read gpu

ha

[blissful roost]

If I could afford, I'd get a Strix 3060 Ti.

[rapid geode]

are the prices sane yet?

[blissful roost]

Nah

[rapid geode]

i think i saw 3070 tis for $800cdn

which is better than it was, but still like double what im willing to spend

apparently we got a buch of A6000 cards at the office.

no idea why.

ha

for the price you could buy a nice used car

anyhow. back to pondering metal printing.

its almost worth spending the $115 just to see how they turn out

surface finish, tolerances etc

this little thing

[blissful roost]

I don't even know what that is. Lol

[rapid geode]

quadro equivelant of the 3090

$$$$$$$$$

ha

[blissful roost]

Ahh

Not something I'd need to look at. 🙂

Yay! Delivered. 😁

[rapid geode]

noone should be looking at them. i have no idea whey they would buy them

Motor adaptor for a brother CNC mill. 86mm square. $136cdn for 2 of them printed in aluminium, including shipping. assuming they actually come out to size and dont need re machining, that is less money that it cost me the cnc mill them from solid.

hmmmmmm

haha

[tardy badger]

It’s snowing and I’m here for it

[edgy apex]

I am looking for some advice. My friend recently started working for a food pantry a few towns over. I showed him all of the pi things I made for our pantry: freezer/fridge alarms, number machine, number sign, packing station. He wants me to show his boss tomorrow what I showed him and they might want "my help" but I don't think my friend understands exactly what I did/how long it took nor is he capable of running systems like ours never mind debugging them if something goes wrong. I don't want to say that but I do want to convey to him that even if I could reproduce our systems for them, he would be in way over his head.

[crystal ore]

I'd say you're right to be worried. Everyone is used to consumer electronics, so if they see something working, they assume that it is flawless, should cost $29 at Best Buy and come with a lifetime warranty from its manufacturer, i.e. you.

Maybe spin it like, "Oh yeah they let me play around with some experiments at the pantry. If you know of an electronics hacker that wants to try the same sort of stuff at yours, I'll be happy to give him a pointer or two."

[drowsy bramble]

what's the best place to ask about items arriving damaged in an order?

[edgy apex]

I think something like that regarding the diy nature of everything as well as mention it took me several months to setup Salesforce and another couple months for the ordering system plus the chip shortage which affects all the hardware I used.

[fair summit]

an Adafruit order? Write to [e-mail], and include your order info.

[rapid geode]

its 22c here and too hot for demolition work

[crystal ore]

Salesforce integration? Oh good god, yes, run away from any talk of "helping out"...

[blissful roost]

@rapid geode Got everything bar the PSU now. 😁

[edgy apex]

So tomorrow my focus is being as technical as possible, talking about time involved as well as all of the services involved. I don't want to and I'm not going to duplicate the systems for non technical people but I want them to come to that conclusion based on how I explain everything. I am thinking of releasing the code for the numbering/ordering system we have been using for 2+ years (pi number machine and pi number sign) and just say here's the GitHub link, have at it

[night crescent]

Desk of Ladyada - Teensy Tester Redesigned to RP2040 Pico https://youtu.be/iSWNARXhVM0

[stable vapor]

Does anyone remember the name of a GitHub library or project that allowed you to matrix a ton of 7 segment displays together? Can’t find the name.

[late fulcrum]

Like this one? https://www.hackster.io/news/a-336-digit-7-segment-matrix-display-15504a9fff11

[stable vapor]

Yes, think this might be it https://github.com/combs/PythonIS31FL3733 but I thought there was a larger project working on them

[static flare]

for a second I thought those 7 seg displays were like the minitron ones I have laying around, but alas

[late fulcrum]

Minitrons are really cool!

[static flare]

they are!

I don't exactly have a use for mine yet but I'll find one!

[late fulcrum]

I'm thinking some sort of weird art project

[tardy badger]

Happy Diwali 🪔 to the folks here that celebrate

[static flare]

weird art def could work!

[tardy badger]

I love that all art is weird because humans are weird. The gangly apex species that decided we liked to keep that image in our brain on any medium we could find

It’s also interesting that if it wasn’t weird to do, we probably wouldn’t have done it

[rapid geode]

and then we fight to own it

... or throw mashed potatoes on it

[tardy badger]

Today is a great reminder that if it’s snowed real good and the roads are icy, it won’t matter if you’re truck is 4 wheel drive, it’ll be no wheel drive when you try to stop on that sheet of ice you’re speeding on.

[late fulcrum]

But if you're driving a hovercraft, it doesn't matter, as you're already used to no traction.

[tardy badger]

I doubt anyone here where I am is driving a hovercraft to work lol

Looks like a lot of the accidents near me this morning were single vehicle ones. It’s a shame really. It seems like more than ever, people are willing to sacrifice their own safety and the safety of others to get somewhere 2 minutes faster…

[edgy apex]

Turns out I was worried for nothing, My friend and his boss are basically interested in comparing notes and collaborating with us. They brought us a box of bananas, we gave them a tour of the pantry and explained our process/systems then chatted for about an hour. I am going to go tour their new facility soon, check out the software they use and I might make some refrigeration alarms for them.

[tardy badger]

Me when I figure out what’s the problem with my code:

[wispy heron]

Relatable

I spent like four hours troubleshooting my neopixel+propmaker code before I realized I wasn’t setting the enable pin. Even though I knew to set it and had set it in all of my previous code.

[tardy badger]

My issue is I was pulling in artifacts that I didn’t need anymore. And I forgot to remove the line that added them to my preferred repositories file.. gotta love it.. Apache Ivy package management for the win

🤦🏻‍♂️

[versed iron]

Replicated, Thanks. Now I need to find where to embed that tiny doom screen. 🙂

[sick adder]

Awesome! I hope you won't waste any fine Belgian chocolates in your quest.

[warped carbon]

oh hi!! I did indeed make a bigger one too, https://hackaday.io/project/181483-7200-segment-1152-digit-7-seg-display

[warped carbon]

my library is pretty simple, in order to run lots of controllers I just instantiate it multiple times and my application carves up the data. This project had 48 controllers on 3 i2c buses on a single pi4.

[warped carbon]

the is31fl37* devices are lovely! props to adafruit for having some great boards incorporating them. https://www.adafruit.com/?q=is31fl37&sort=BestMatch

[hard mica]

Nethlack?

[stable vapor]

Hi Chris! Love your work! Thank you for the link!

[misty lava]

If anyone has any myoware muscle sensor boards I will pay good money for them. They are desperately needed. Or if anyone knows what I'm talking about and has any alternatives that they know of please let me know!! Thank you.

[wary herald]

Hi. I know I haven't been as active as I was on this server, but I saw one of your Twitter posts on another unrelated server, and I just wanted to stop by and say that your products reach farther than the electronics world, and that I'm just suffering from burnout from having this as my hobby and my job at the same time 😄 . I'm not dead, and hope to return when I regain my passion.

[torn condor]

Hi! I have searched for a while but I can't find what I'm looking for so I will ask here... I'm looking for a project that made water in to a mist. There was some kind of speaker that operated at a special frequency so the water reacted to it.
Does anyone know what I'm talking about or was this project just a dream?

[solar kindle]

Something like this? https://www.amazon.com/Fountain-Ultrasonic-Aluminum-Humidifier-Halloween/dp/B07Q3TXYMW

DIY version: https://www.youtube.com/watch?v=aKhPj7uFD0Y

[warped carbon]

this artist made a pixel grid out of those ultrasonic mist elements (scroll down) https://www.pacegallery.com/exhibitions/rafael-lozano-hemmer-common-measures/

[thick wind]

I was on hackaday reading blog posts as usual, when a post on tiny tape out popped up. Interested, I looked into it somewhat and found @tardy badger as one of the design contributors. Was wondering how you would rate the experience? As someone already in the process of studying FPGA design, is #2 something worth being on the lookout for?

[tardy badger]

It was a very easy experience all things considered. There are two routes you can go, design with the Wokwi editor or submit an HDL design in the form of Verilog, or any of the supported HDLs for tiny tapeout

I personally think the excitement factor is a big part of what makes it worth while

[thick wind]

Is it a nice PCB though? 100 bucks is about as much as a nice FPGA dev board, and that’s probably the bigger drawback for me.

[tardy badger]

The PCB comes with an 8-dip, button, seven segment display, and headers for the 8 inputs and outputs. It’s also a BGA chip so most of the cost of that board is likely the PCB. I just did the $25 for the design to be included. $100 wasn’t really enough for me for something that had tons of designs on it.

I just liked the idea of having my design fabricated

[thick wind]

Ohhhh, that’s an option I’d consider

[tardy badger]

Just adds a line to my resume: “chip designer”

Lol.

[rapid geode]

adds pasta to their resume

not as a skill, but a demand

[stable vapor]

Has anyone tried getting a job in a different city or state or country? And how did you go about it/tricks to do it? Could I message you? I want to get out of my city and move to any major city but I’m mainly looking at Brooklyn or Boston.

[crystal ore]

That's fairly common I think. You just apply to jobs in the city you want to live in, and be prepared to move if you get one. Larger companies sometimes will even help you with relocation expenses.

[tardy badger]

What kind of work do you currently do?

If you’re doing embedded engineering or related (like software eng) FormLabs is hiring for their Somerville office in Massachusetts

[rapid geode]

apply for job, then request moving. it happens a lot with skilled jobs. i did one job where they paid flight and a months hotel to bring me there.

[stable vapor]

Full stack web dev but I’d ideally like to work with Arduinos and physical buttons and sensors. I applied the UX prototyped job at Formlabs after seeing it on CreativeApplications.net but haven’t received a reply and don’t know who to follow up with. I’ll keep looking there though, it seems cool.

[stable vapor]

Oh wow, that’s pretty sweet

[stable vapor]

Thank you

[rapid geode]

my industry is always short of peope, so 90% of our new hires come from other cities or countries

[tardy badger]

Gotcha, do you have a LinkedIn profile?

You can set your profile to show recruiters your interested in new roles

[stable vapor]

I do, https://www.linkedin.com/in/edwardcdeaveriv . I’ll add UX to the roles I’m interested in.

[tardy badger]

If I see any roles, I’ll tag you in them on LinkedIn. I have a large number of recruiters in my network

[stable vapor]

Thank you so much!

[frigid tiger]

That sounds like exciting work

[tardy badger]

I would have jumped on it but I’m not looking to move right now as I’ve done a lot of moving lately. And the economy is kind of up in the air. Going to stick with my somewhat more stable job

[stray wind]

@stable vapor My housemate recently applied to a company close to us, and all the interviews were virtual anyway. You'll find that to be the case with a lot of companies, at least for initial interviews. So initially it doesn't matter where you are, apply wherever you'd like to end up. I would suggest finding out for sure that the jobs you're applying for aren't fully remote, because that defeats your purpose. Many places will fly you out for any subsequent in-person interviews, if they include those as part of their process. As stated, some companies will pay for you to move. Others, however, won't, so you might want to be prepared to cover the cost of moving if you successfully find work.

[burnt tendon]

Yeah my place of employment interviews virtually and hires people to work remotely as our SOP these days.

[late fulcrum]

Nice. I've heard of some companies (such as Verisign) that are almost entirely virtual.

[rapid geode]

half our staff works at home now. its just the new normal

[stray wind]

My housemate's job is 4 days home, 1 day in the office. First WFH for him in any capacity. He's.... slowly getting used to it.

[modest knot]

does anybody know if a mosfet or any transistor of any sort that will accept any range from 1v all through to about 90v at the gate, to allow 3.3v to pass from drain to source? not sure about current rating yet. but needs to be capable of high switching frequency too..

[rapid geode]

i havent seem my office since march 2020

i assume i still have a desk cause the computer still works

haha

[thick wind]

Rather than a transistor, an optocoupler may be better suited for you application?

[modest knot]

Can they switch at MHz frequency?

[dusty citrus]

I was flown for an interview once and I’m not even a wfh trade.

[thick wind]

Oh that is tough. They exist, but definitely something to look for specifically.

Why the large voltage range?

[blissful roost]

I would love a fully remote job right now..

Sadly, my current role doesn't offer any flexibility there.

[thick wind]

This doesn’t seem to be a single-IC job, you may have to divide this into a voltage limiter circuit and a transistor/comparator.

[thick wind]

Ugh, that feel when I miss product pick of the week the one time a product on my list goes up on sale...

I'm so sad.

[late fulcrum]

I've gotten used to it, and just wait for discount codes to float along

[crystal jolt]

@thin canopy Hi!

Thanks for offering help.

[wooden valley]

Im looking for an electronics project that is 60 dollars or less and includes all the required tools

[rapid geode]

anything more specific you want it to do?

[wooden valley]

I just want something fun and functional to build my expertise

[tardy badger]

Do you have a soldering iron?

There are some cool soldering kits that Adafruit sells that are like 3D puzzles

[dusty citrus]

Logic probe was one I did in college. It was cool

[wooden valley]

I do but its very bad like very bad

I cant get a job yet so I have a small budget

[wooden valley]

yea but I have no idea how to use that lol

[tardy badger]

Gotcha, maybe this https://www.adafruit.com/product/5100

[dusty citrus]

I just did a terminal board from Adafruit. That was good

[tardy badger]

You can put it together and make a cool macro keypad for your computer

Like programmed shortcuts or combo key presses

And a $5 add on kit to make it more refined looking https://www.adafruit.com/product/5103

[wooden valley]

I already made something similar with a raspberry pi pico

[tardy badger]

Oh gotcha

[wooden valley]

the other one was made way more jank and had a 3d printed case

[tardy badger]

Makes sense. You might look on https://learn.adafruit.com at the guides there

They usually tell you everything you need for them. And you have a 3D printer it sounds like, so lots of opportunities

[winged finch]

Can you pay with multiple gift cards?

[tardy badger]

on Adafruit's website?

[winged finch]

Yeah

Work gave me a bunch of gift cards

and they always end up with a some cents left on them because most online portals don't let you stack the way you could IRL

[tardy badger]

you might contact support to see if there is a way to combine remaining balances.

[winged finch]

I'll give that a go, thanks

[ebon dew]

Can never go wrong with a macropad, great suggestion skerr.

Got one for my brother as a birthday gift, he loves it.

[hollow blaze]

Can anyone help me find a library to use the INA226 module? I could only find a single one on Github and I'm not getting accurate results from it.

[tardy badger]

Arduino or circuitpython?

[hollow blaze]

RaspberriPi 4b, the libarary I'm using isn't using circuitpython I didnt' think.

[tardy badger]

Blinka would allow you to use the circuitpython library for it

[hollow blaze]

Do you mind elaborating via PM?

[tardy badger]

No need to do PM, check out this guide https://learn.adafruit.com/adafruit-ina260-current-voltage-power-sensor-breakout/python-circuitpython

[hollow blaze]

How do you know my INA226 will work with this 260 Sensor's library?

[tardy badger]

Oh whoops, dyscalculia kicking in, hold on

https://github.com/e71828/pi_ina226

Try this

[hollow blaze]

That is the one I'm using and getting errant (I think) results.

[tardy badger]

I’m not really sure what a good result/value would be

[hollow blaze]

multimeter is showing .3mohms while my ina226 is reports .105mohms consistently.

volts

my multimeter shows the .1mv on the V- and V+ terminals directly. So i guess the INA226 isn't "wrong"

idk where my over .2mv's are going over this jumper wire because it measures .3mv on the other side.

[crystal ore]

I'd be a little skeptical of multimeters accurately measuring down into the sub-millivolt range. All sorts of factors like how hard the probe is pressed on the wire could matter.

[hollow blaze]

I appreciate it, I found that to be true. But I've used a couple and the math checks out for around .3mv and I'm getting that on a few tools.

Everything excect the INA226 terminals.

Do I need to desolder the buildin shunt resistor if I"m using an external one?

[hollow blaze]

The answer to that last bit was yes, that was it.

[dusty citrus]

Seems like if you go that low you’d jump into a cheap scope for accuracy.

If I recall all my school work that was measuring milli anything was done on a scope.

[dusty citrus]

I don't know it should be winter but it feels like spring/bordeline summer

[visual echo]

would anyone be interested to help me on a little side project tonight ?

[tardy badger]

Usually better to share what you’re working on and any questions you have. If you’re looking for long term help, you can post on https://adafruit.com/jobs

It’s free

[visual echo]

@tardy badger its an old project but I just started coding about 2 weeks ago so I'm lost on a few things I cant seem to find the exact pin outs online and the coding to me is different of what I have been learning.https://github.com/pomeroyb/PortalGun so what id like is to hire someone to make the code a copy paste and a basic wiring diagram.

[tardy badger]

Gotcha, yeah the Adafruit jobs board would probably be the best place to post for that kind of work

[visual echo]

@tardy badger thanks ill give it a shot

[night crescent]

WE ARE LIVE! SHOW AND TELL! https://youtu.be/nZCcg9PP5iE

[night crescent]

ASK AN ENGINEER 10/26/2022 LIVE! https://youtu.be/xVAy6AmXvWI

[static flare]

ooh the scorpio looks cool and potentially useful

[wooden valley]

Instead of doing an electronics project Im gonna save for a flipper zero

[static flare]

How much are they?

[past palm]

they are going for about $800.00 on ebay right now. LOL

Used

Wish I had got a hand full of them when they came out. there are 2 listed 1 open box for $1250.00 and another pre-owned $1053 + $33 shipping. Crazy

[static flare]

welp

I do love the amber look of them

[past palm]

I have some amber PLA. I can print you some. LOL

[static flare]

oh i meant the screen

[late fulcrum]

Another way to get an absolutely awesome looking orange screen is with an orange phosphor CRT. Jan Wüsten has some suitable 3JP12 tubes for €110.

[wooden valley]

New stock soon

[static flare]

Ooh, I'll look into that

[wooden valley]

The device do be really cool tho

Kindq just want the ir remote function

[static flare]

and it's all in German, I think

[static flare]

You can do IR much simpler, depending on your needs

[wooden valley]

Yea but can it open a tesla charging port

Plus for the price it wont be easy to make something as portable

[static flare]

I wouldn't know, I've never worked with IR before

[wooden valley]

Me neither i just know how easy it is to control with a flipper

[static flare]

Oh it's round

[late fulcrum]

There are rectangular orange phosphor CRTs, but most of them were larger ones for old style "amber screen" computer monitors. That 3" round screen one is really long, since it's electrostatic deflection, even a 13" monitor screen tube is shorter, as those use magnetic deflection.

[static flare]

I'd love to get my hands on an old amber CRT monitor, I only really have monochrome white CRTs

[late fulcrum]

I have a couple of old Atari (made by Goldstar) SM124 amber monochrome monitors, but it would be expensive to ship them.

[static flare]

As are most CRTs, sadly

[late fulcrum]

Yeah. My last CRT TV weighed 200kg. There are some adorable little CRTs used for viewfinders, flood beam displays, and miniature instruments, that I think would look great in handheld props.

[shadow siren]

You mean that CRT weighed 1961.33 Newtons but massed 200kg....

[late fulcrum]

The entire TV was 200kg, but yes, the majority of that was the CRT.

It weighed ... 440 pounds.

[astral portal]

Same they also have a discord: https://flipperzero.one/discord

The flipper zero looks AMAZING for the price of $179 from the website

[main lodge]

👀 Is this one of you? 🤣 https://twitter.com/CrazyTalkAl/status/1584645790286643201

Crazy Talk Al 🇺🇦 (@CrazyTalkAl)

When you tell your dad you want to be a Transformer for Halloween.

Likes

4337

Retweets

727

Twitter · Oct 24, 2022, 8:39 PM

[astral portal]

No?

[wooden valley]

169$

[wooden valley]

yes Ik

[sly igloo]

Hello chat

[astral portal]

Nice

[frigid tiger]

what would you use the flipper zero for

[tardy badger]

Wrecking havoc on gas price signs and turning off restaurant Tv menus

Ya know, normal things lol

[edgy apex]

I like to use my flipper to open handicap doors for unsuspecting victims

[rapid geode]

O_o

open peoples garage doors?

(i dont know what a flipper is but i assume its some sort of IR remote device)

[tardy badger]

RF hijacking tool

[rapid geode]

ah

[shadow siren]

Anyone watch Adrian's Digital Basement. He just put a video out where he almost tossed a 47 year old 6502 https://youtu.be/ewtRCdwbTEw

[topaz jay]

Just found this awesome video about making mechanical circuits! https://youtu.be/QrkiJZKJfpY

[covert spire]

I have seen that video posted on so many servers, lol

I think there's a common trend among servers I'm in, lol

[topaz jay]

Sorry if this has already been posted here before. I'm not following the channel too closely. Just got childishly excited about this!

[covert spire]

Oh, I don't know about here, I meant others

And it was others who posted it, lol

[wispy heron]

My partners just now said my birthday present is get stuff from adafruit. Aw yeah, time to go on a shopping spree, can finally empty out some of my wishlists!

[stable vapor]

Has anyone seen any servo/motor setup that can flip the pages of a book?

[dusty citrus]

istr a TV spot showing a vacuum in a tube for that.

[violet parcel]

in an uncontrolled way yes on plastic table fan with the grill remove and the fan gets too close

[rapid geode]

alrighty, im framing out this room this weekend, so nows the time to fill it with adafruit trickery, haha. any ideas beyond the obvious lighting and fireplace controls? i want to redo the fire leds with neopixels too.

[static flare]

congrats!

[midnight tree]

Any Phillies fans here? 🔴 ⚾

[rapid geode]

no. no one is a phillies fan. not even their mascot.

[midnight tree]

I was gonna send this to actual Phillies fans but wow. Check it, my brother made it: https://youtu.be/NCFrg90tA_k

clears throat
🎵**"No one likes us, no one likes us
No one likes us, we don't care
We're from Philly, f###ing Philly
No one likes us, we don't care"**🎵

[rapid geode]

hehehe

[dusty citrus]

[dusty citrus]

I see that on ultralibrarian you can request footprints/3d models/symbol under payment

but do they make those themselves or source them from some third party?
if it's some third party, is it possible to join in?

[late fulcrum]

That's an interesting thought. Those symbols have to come from somewhere, and making them can be kind of fun (I've even written software to generate footprints for some parts).

[gusty chasm]

Hi everyone,

I'm new to Python programming and I'm trying to create some simple Circuit Python animations, like a dot moving on the OLED display or an analog clock.

I'm using ESP32-s2 mcu and the 0.96 Inch I2C/IIC 4pin 128x64 OLED Display Module.

Can anyone help me with the code ideas? I would really appreciate it.

[dusty citrus]

I think that they probably outsource Labor
but the problem is that similar industries aren't that open about it
like you can work under ikea or an isp as an independent individual, but joining them is like super hidden

idk why, I mean they would have all interests to have competition and ence cheaper labour, don't they?

[late fulcrum]

Yeah, I don't know if they have some employees cranking them out, or they're using freelancers or what.

I suppose it depends on their business model: often the labor cost is less important than convenience.

[crystal ore]

Welcome! This is probably better asked in #help-with-circuitpython, where the real experts hang out. 😁

[jovial badge]

Anyone know what these outlets are?

Do they connect to regular outlets? The block on top can spin and my multimeter says they're 24 volts

[late fulcrum]

Those are doorbell transformers

[whole jacinth]

you might not want to spin them. they're likely hardwired to 120VAC, and spinning them might damage the insulation on those 120V wires

[rapid geode]

doorbell and possible also thermostat

1 for each

[whole jacinth]

in my experience, thermostat transformers are usually located on or near the furnace/AC unit

[ebon dew]

that's horrible, they should not be plugged into outlets. transformers... plugged into... outlets. there's no way.

[late fulcrum]

I doubt they're plugged into outlets, just hardwired into electrical boxes. Although wall warts have been around for ages, they generally don't look like that.

[ebon dew]

they shouldn't be sitting out in the open like that either with exposed wiring. lower voltage yes but still it's a transformer.

[late fulcrum]

Perhaps not, but thermostats and doorbells were generally wired that way for years. Many phone transformers had screw terminals as well, but sometimes had a cover over them or were facing the wall so were less exposed.

[ebon dew]

yes yes we've moved on from all of that... like 30 years ago.

[late fulcrum]

As may be, but I doubt all the old wiring has been retrofitted. There's still knob and tube wiring in use today.

[rapid geode]

normally they have a cover box. but it probably broke off 50 years ago

[rapid geode]

my house still has remnants of ceramic knob and tube wiring. they did some real dumb things in the old days 😛

the "new" wiring is cloth and paper wrapped copper

luckily hey missed the aluminium wiring generation

this is what passes for a foundation in my house as well. a little concrete block and some clay bricks to hold up the joists. i guess it could be a lot worse

[dusty citrus]

at least housing was affordable

[rapid geode]

my house was welfare housing. $12 a month in 1945

now... not so much

haha

[tardy badger]

Who needs to order things on reels when you can print one in 4 hours

[dusty citrus]

that glass confused me

[tardy badger]

Why?

I do the antithetical thing of printing PLA on the shiny side of the tempered glass plate lol

It’s antithetical because most everything I’ve read says “ya, don’t do that”

[wooden valley]

ts100 or pinecell

and where can I find the ts100

[tardy badger]

Their website should have a shop listing

https://pine64.com/product/pinecil-smart-mini-portable-soldering-iron/

[wooden valley]

yea but the pinecell website has 20 dollar shipping to my house

[tardy badger]

Might try Amazon

[wooden valley]

they dont have it there

[wooden valley]

can I power the pinecil witha 20 watt usbc c brick
or do I need something more powerful?

[dapper wraith]

any USB-C power supply that supports PD (Power Delivery) that is same or more than minimum Volt/amps listed (PD65W-20V recommended, but PD45W will work on V1).
From the pine64 wiki https://wiki.pine64.org/wiki/Pinecil_Power_Supplies

[solar kindle]

I was considering getting one of these and strapping it to a 3D pantograph (along with an endoscope) to use for precision soldering.

[tardy badger]

That would be fascinating to see

[solar kindle]

Or possibly a complete disaster.😆

[tardy badger]

Lol

[tribal lodge]

Hi, Can i short EN to GND (turning off the 5v output current) while im charging the battery? i dont want to let my pi sit doing nothing wasting power

Its a powerboost 1000c

[night crescent]

Desk of Ladyada - EYESPI 2.8" TFT revision & Scorpio revisit https://youtu.be/iGL1YvRAKok

[hoary lynx]

does adafruit have an hx711 board?

[late fulcrum]

AdaFruit offers an NAU7802 board for use with strain gauges, if you prefer the HX711 chip in particular, SparkFun offers a board with it.

[hoary lynx]

I'll look at the adafruit one. I really like the adafruit stuff Would the nau use a different lib then the hx711 ? I already have a functional lib for using the board on circuit python

[late fulcrum]

I assume the different chip would require a different library, but I don't know for sure

[late fulcrum]

I got this amazing shot of our neon jack-o-lantern along with the moon and couldn't resist

[tardy badger]

This looks super cool

[tidal flare]

[hoary lynx]

They look very similar but having a stemma qt connector is definitely nice. Its also about 1/3 the price

Not sure why I would want to use the sparkfun one

I'm connected to an nrf52, it doesnt seem to have a stemma qt connector on it

[median viper]

Hello guys

Anything cool going on?

I haven't checked or been in here for a few months

[dusty citrus]

I’ve been here for months. Negative ghost rider. Same bat day.

[median viper]

What do you guys think of the use of "Rust" language for embedded systems?

[tardy badger]

Seems to be popular though I’ve not personally used it

[crystal ore]

Promising, but still not widely supported, and there's a bit of a learning curve to the language.

A good blog series about it: http://cliffle.com/p/dangerust/

[median viper]

great article

[bold frost]

Does anyone know if transfer functions exist of ToF-sensors?

[late fulcrum]

I would expect it to be largely linear, but you could graph it fairly easily if it's not already out there.

[tardy badger]

Living the copy-paste life at work

Updating to new library versions and needing to paste a lot of () onto overloaded variable name setter/getter variables

[crystal ore]

That's one thing that Python was clever about with its property decorator... You can swap out a plain variable for a getter/setter function down the road without any changes needed in client code.

[tardy badger]

Yeah

This method for getting/setting variables in C++ is new to me. I thought you needed formal getX() and setX() but you can just use an Impl and make overloaded plain name variable functions that return a reference to the Impl member variable and you can change it by just saying x() = val or val = x()

You don’t need the Impl, but it makes it less likely you’ll have dramatic API changes down the road

The interesting things you learn

[crystal ore]

I see how that would be useful on the getter side, but the setter is a little more questionable. How would you implement classic setter extra behavior like bounds checks, or triggering an action based on the value?

[tardy badger]

I’d imagine you’d implement the logic while setting. I’m certain there are ways to achieve what you are asking.

[crystal ore]

Well, it just seems like the setter function has to finish executing and return its reference before it even sees the value being assigned to it.

Or maybe it returns some object that then overrides the assignment operator?

[tardy badger]

Right, you could implement the logic in the return I’d guess

It might be tricky

I’m not very familiar with how flexible it is in that regard. Hopefully I’ll learn more over time and be able to answer it more precisely

At least in the case of translating between different message standards where you know that the incoming message will be in a specific format, it works like a charm

[dusty citrus]

I hate kicad, doesn't exist anything free or really cheap that has an interface like a cad or rhino?

[crystal ore]

If you're looking for better 3D mechanical CAD integration, you might try Fusion 360.

[dusty citrus]

what I hate is drafting
like you need to play with grid precision to make straight lines or unstraight lines, which also by consequence precision is gone, unless you don't access to sub menus which are equally slow
arrays are dumb

a work that I could do on rhino in 2 minutes, on kicad it takes an hour

or then auto routing it doesn't exist by default so you need plugins, or navigate on thousands of plugins or sub programs to have basic functions

[crystal ore]

Fusion wouldn't be any better there, I expect.

[rapid geode]

freeform software is fast, but (usually) has no parametric revision ability, constraints or precision

rhino is horrid btw 🙂

haha

but i guess its cheap. im surprised its still made.

[dusty citrus]

rhino is the best cad imo
not parametric by default, but grasshopper is
also it's dirty cheap, and perpetual licensing

[rapid geode]

rhino is NOT cad. its a freeform nurbs modeller, and among the worst available

art departments used to use rhino a lot, but they have now latched onto sketchup sadly.

[dusty citrus]

I think that you're wrong, but I might be as well, would you dare to explain?

[rapid geode]

Hmm, i guess it has some degree of CAD features now. it never used to

(ive used it since v1 on and off)

[dusty citrus]

v1? 1998? 24 years have passed! I wasn't even born

[rapid geode]

.....

"since"

[dusty citrus]

since rhino 5 (when I started using it) it already had plenty of cad functions
but anyway it doesn't matter

any alternative to kicad for drafting that doesn't suck so bad?

[rapid geode]

none that dont cost money

[dusty citrus]

how much money?

I mean just state some naming

[rapid geode]

well, autocad is $1500/y which seems to be about standard now

fusion 360 is a mechanical engineering software. kinda replaced CAD drafting but not really useful for straight 2d drafting

[dusty citrus]

which autocad? I'm pretty sure that autodesk has like 10 different software under the same naming

[crystal ore]

If you happen to be in school you can get an educational Altium license.

[rapid geode]

autocad is just one thing. theyre used to be an LT version, i dont know if it still exists

LT is $600cdn a year

barf

haha

[dusty citrus]

so the 2d/3d package?
but how it differs from rhino?

I mean if I can draft from any cad package, how can I output any useful format for PCB manufacturing?
I'm somewhat new to this, so idk

[rapid geode]

pcbs.. ah. thats a totally different thing

fusion 360 includes eagle

[crystal ore]

You really want to use a proper ECAD tool for PCBs. They will perform a lot of design checks to make sure your board works, will know about parts and pinouts, etc.

[rapid geode]

hm. free fusion no longer has eagle?

[crystal ore]

It should, but I haven't checked recently.

[rapid geode]

i dont see it in the menus

loading up my paid one...

[dusty citrus]

altium student was like 3 months?
I tried easyeda but was like worse than kicad, it didn't allow batch placing

[tardy badger]

Altium student is a 6 month license

You can renew it as long as you can verify you’re a student

Anyway, you’d be hard pressed to find an ECAD program that didn’t have grid parameters that needed to be adjusted during the design process. It’s a nuance you come to live with

[late fulcrum]

Yup, KiCAD is open source, so you can modify it to act any way you like.

[dusty citrus]

yeah I won't do that

[tardy badger]

I believe in Eagle there’s a keyboard shortcut to disable grid snap

Or you can set default grid value really small if you don’t want large grids

[rapid geode]

ah i found it. you need to start a new electronics design

so free fusion has eagle. some people like it, other hate it with a passion. haha

but... free

[tardy badger]

https://www.autodesk.com/products/eagle/free-download

[rapid geode]

oh they still do stand alone?

[tardy badger]

You have to Google search the download to get the Eagle stand alone software

[dusty citrus]

the problem with free fusion is that I can't download it
for whatever reason it gets stuck to a page, like a button doesn't work

[tardy badger]

They want you to use fusion360

[rapid geode]

yeah

O-o

[tardy badger]

I hate ecad in fusion360

It’s horrible

I only use it to get 3D views of my boards

[rapid geode]

ha

i dont design circuit boards, so i dont know.

[tardy badger]

I’ve thought about going to KiCAD but I’m lazy

I’m milking an student license of eagle so until they tell me no, I’ll keep using it

[rapid geode]

what about the jlcpcb app? is that tied only to their service? ive hears its pretty useful

[tardy badger]

EasyEDA?

[rapid geode]

yeah

[tardy badger]

Seems good enough to get started

[dusty citrus]

no it's bad really bad

[rapid geode]

ha

[tardy badger]

I’ve seen people design decently complex designs on it; bad is a matter of opinion

[dusty citrus]

the only good thing are libraries if I remember correctly
but you can't do any batch thing
so you'll stuck at placing everything one by one, wasting hours

[rapid geode]

this is a person that likes rhino, so their option is questionable 😛

[tardy badger]

Everyone has their preferences as to what they are comfortable with. Plenty of people start on EasyEDA to get their feet wet with design and move on to KiCAD et al.

[rapid geode]

runs

[tardy badger]

Not meeting your needs or preferences doesn’t make it bad software, just not a good fit.

And that’s okay

[rapid geode]

i guess depends the type of boards you want to mek

[tardy badger]

It’s not for everyone

[rapid geode]

an arduino, or a gtx4090

[tardy badger]

I’m also not exactly sure what you mean by batch placement

[dusty citrus]

yeah you're right
but I can still think that's bad for me

[tardy badger]

Like placing groups of parts at the same time?

[late fulcrum]

I'm still using Eagle to get as much out of my $1400 license as I can, although I did get an email from Autocad recently telling me they will no longer create new license files for it, I can run it on this computer for as long as I want. Since new computers wouldn't be able to run it anyway, I'll stick with my original plan of using Eagle as long as I can (on this computer), and switching to KiCAD when I have to upgrade my computer.

[dusty citrus]

yes, or routing stuff at the same time

[rapid geode]

you dont want the new eagle?

[tardy badger]

Eagle offers design blocks which can be pre-routed blocks of components

[late fulcrum]

I have a strong personal bias against subscription based software of certain kinds, so I'll use Eagle and Photoshop as long as I can with my paid-up license, then switch to something else when I can't use them any more. For some software types (for example, the software that drives my vinyl cutter), I'm okay with subscription based software, but for PCB and photo editing, I'm not.

[dusty citrus]

tomorrow I'll try eagle, see if I can run again altium, and try another bunch of random software from the net

maybe I'll find something that I'll like thanks

[rapid geode]

even if the subscription is free?

i do agree though

i mean they just keep removing features from fusion

[late fulcrum]

I am not aware of a free subscription to Eagle that includes a full feature set.

[rapid geode]

oh, i see, yeah limited

[dusty citrus]

yeah, and the few stuff that were perpetual they are killing them, or get sold to corporates that will kill it
clipstudio has become a subscription plan
and so did redshift
ans now zbrush probably wil end in the same way
thanks maxon

[late fulcrum]

Yeah, it's all a cash grab, and I refuse to play that game.

[rapid geode]

everything is subscripton... also redshift is horrid

😛

[dusty citrus]

btw I heard that adobe wants to make you pay for colours

[dusty citrus]

it's the fastest rendering software :-P

[tardy badger]

No Pantone wants you to pay for colors

[rapid geode]

not even close

[tardy badger]

If you only do digital design, then you don’t need to use Pantone colors

[late fulcrum]

Heh, I wrote the fastest rendering software back in the day. It was horrible too, but it was certainly fast.

[rapid geode]

povray ftw

[tardy badger]

Pantone colors are for print media. Which I only learned after seeing people complain about Pantone’s subscription money grab

[rapid geode]

the pantone thing doesnt bug me, but my friend does packaging design and its all pantone

[dusty citrus]

oh christ
discovering things

[rapid geode]

tv doesnt need pantone luckily

[tardy badger]

I haven’t opened photoshop elements 2018 since the update

[late fulcrum]

Heh, I have a sneaking fondness for Povray.

[rapid geode]

ha

[dusty citrus]

nah

[rapid geode]

brazil was the best

but, arnold is the mainstream for tv/movies right now

we used redshift for the expanse season 5 and 6 but have abandoned it

4 days renders.. nope, no thanks

(season 1-4 was vray, which we have banned from the studio)

[late fulcrum]

I used to do some sign work, and people thought I was nuts. They'd ask if I could identify the typeface and color and I'd glance at it and say "Cooper Black, Pantone 286", and I'd be right. But I haven't worked in that field for a while now.

[rapid geode]

ha

colour is a nightmare generally

we mostly gave up on calibration etc, and just view on a single reference screen

[dusty citrus]

gpu support is still bad isn't it?
on cpu pretty great but slow
redshift works best with houdini
their mantra stock engine is weird, but usually slow af

[late fulcrum]

Someone wanted to know the Pantone color of the TARDIS, and while there is an "official" one, the TARDIS props themselves have been a range of colors over the years, and pretty much any dark blue is close enough.

[rapid geode]

redshift we used out of maya. houdini if we do render out of (usually only fx and sims) it is arnold or mantra

redshift is mostly dead to use though. way too slow

[dusty citrus]

are we talking to the same redshift, aren't we?
first gpu rendering (biased)?
it's the fastest in my experience

[late fulcrum]

We used to do all the pre-renders on SGI (which was super fast, but Gouraud shading really looks bad these days), and the real renders on farms of Sun/SPARC machines.

[rapid geode]

(the reason it is slow is because you are limited to what fits in your 12 or 24gb ram, and out scenese need 128-512gb to render)

[rapid geode]

first? ha, not even close. 50th maybe

in any case, yes, same redshift, same slowness.

everyone wants magic, but there is none

arnold brute force always wins out.

because it just works

render once 🙂

arnold:

🙂

[dusty citrus]

not the gpu support though
(last time that I tried it)
then maya changed policies and then I'm forced to use that garbage of blender

[rapid geode]

gpu is usually not used

not cost effective

thats also part of why we abandoned redshift

400 RTX6000's is not cheap

[dusty citrus]

oh so you work in a studio?
well different scale of things

[rapid geode]

yes, massive scale, ha

theres some redshift

problem child. ha. 8k renders didn't help.

iray. Now THAT is a fast renderer.

[dusty citrus]

I remember that
but now it's not supported anymore, pitable

[rapid geode]

adesk cancelled the contract yeah

same goes for mental ray.

[dusty citrus]

anyway I don't like the trend of stuff being bought by corporates, and then killed
maxon will kill too zbrush in one way or another

[rapid geode]

nah

[dusty citrus]

but hey there's blender the industry standard /s

[rapid geode]

....

ha

brazil render https://www.youtube.com/watch?v=1Z8XJ9HD0Yw

man that movie has bad acting

😛

trying to think of what other rendered ive used on real work

no povray.

haha

[sick adder]

Can anyone ID these chips, especially the top one? It's an ancient IBM keyboard so 8341 and 8333 are probably date codes. "SA 765229" brings up parts sellers who say they have it in stock, but not what it is 🤣 SA 765229 is probably some kind of quad or hex open collector transceiver. I'm interested in finding out if there's an official spec for its input high voltage minimum.

pinout matches 74xx07 from what I can see

[static flare]

what keyboard is it? might be easier to look that way

[sick adder]

original IBM PC 83-key keyboard

[static flare]

top chip is a 7417

bottom chip is a 7474

[thick wind]

Not the exact info you’re looking for, but might this help? http://www.kbdbabel.org/schematic/kbdbabel_doc_ibmpc_kbd.pdf

[static flare]

Hex buffer and dual edge d-flip flop apparently

[sick adder]

ooh I believe you @static flare -- how did you figure it out from the markings?

[dusty citrus]

what does this notation mean? "2X" number

[static flare]

I did not haha

[thick wind]

Probably another feature that uses those same dimensions

[static flare]

i used the schematic @thick wind posted, but I found it before it was posted

[sick adder]

that schematic says 7407 in one place and 7417 in another hmm

[dusty citrus]

makes sense, there's another piece that's the same, thanks

[thick wind]

I found it on my work pc pretty quickly, but had a hard time passing the link to my phone hehe

[sick adder]

both seem to be non-inverting open collector

[static flare]

both serve the same purpose, but one is a higher voltage i think?

the reference datasheet on Wikipedia for both chips leads to the same place

[sick adder]

yes! 7407 goes to 30V while 7417 goes to 15V output voltage

[thick wind]

When in doubt, reference the lower spec…?

[sick adder]

ding ding etc

Thank you all for the help!

[static flare]

Love being helpful :3

[dusty citrus]

I'd wish discovering such comunities before, previous ones were really unfriendly

[thick wind]

Bottom is a TI, but can’t put my finger on the top logo…

[static flare]

National Semiconductors

[sick adder]

older version of their logo, it's different today

[static flare]

I have a whole bunch of their 4164 chips from a similar vintage who use that logo

[sick adder]

I love old stuff, just don't know enough about it 🙂

[static flare]

I mean, ultimately, I just have a lot of vintage 4164 chips

[thick wind]

Ffff that’s what it was, Ty that would’ve bothered me for a while

[static flare]

Valid! I collect older stuff so I know a fair bit, so always feel free to ask if you need any more help :3

[sick adder]

aw thanks!

[static flare]

It's fun how companies like IBM liked to obfuscate their vintage chips instead of just... epoxy blob

I sound sarcastic, but obfuscation is better than blob

[sick adder]

why yes you did sound sarcastic

does the slash indicate open collector? I'm not familiar with the symbol.

but I know the device is open collector so it's a guess

[static flare]

I'm not either to be entirely honest

[sick adder]

not the notation wikipedia suggests:

⎐ for a pin that outputs low-Z L or hi-Z H (or ⎑ with an internal pull-up resistor)
⎏ for a pin that outputs hi-Z L or low-Z H (or ⎒ with an internal pull-down resistor)

[static flare]

dependencies are fun

[sick adder]

yet another symbol, which doesn't clarify open drain vs open collector

IBM PC XT to USB adapter with QT Py rp2040 .. since the rp2040 is not 5v tolerant, it is using pull down resistors to form a resistive divider at the qtpy inputs. Together with IBM's pull up resistors of 2k, this makes the high voltage ~2.6v which is in spec for the qtpy and in spec for the 7404/7414's return signal to the keyboard controller IC. (of course I also ran it for days without the resistors and the rp2040 was fine)