general-chat

[raw jasper]

It could also end up disintegrating in the meantime

[tardy badger]

heck, probably give it 2 weeks

make sure there's wasps eating it for extra protein 😛

[raw jasper]

https://m.media-amazon.com/images/I/51MLkb59VyL._AC_UF1000,1000_QL80_.jpg

[tardy badger]

i'm practicing DSP for an upcoming grad class i'm taking this fall

[raw jasper]

DSP is neat

[tardy badger]

the class "Digital Image and Video Processing and Compression"

[glad ruin]

Re: #show-and-tell message
@raw jasper GPL applies to works that are copyrightable. As it turns out, most functional hardware designs (mechanical components, PCB layouts, etc.) fall more under patent law rather than copyright law. You can copyright a CAD model or drawing of a design and release it under GPL, but that covers only the drawing itself, not the functional aspects of it. In practice, this means that a foul player can take your design, modify it slightly, and then patent it—blocking you and anyone else from improving on the design. This is something that Prusa and Voron (not a company, but they do design printers) have dealt with constantly.

The other issue with GPL is its notion of libraries linking binaries. There is no clean way to apply it to hardware designs. This is particularly problematic for FPGA designs. Technically, if you create an FPGA design under GPL, you can't use any vendor-supplied primitives because you don't have the authority to release those components under GPL. This severely limits what can be put in your open source design, since for example you can't instantiate DSP blocks, use SERDES or I/O pin primitives, etc.

That's my attempt to summarize the major issues as I understand them. I may not have gotten it 100% correct, but I believe it is at least mostly accurate.

[raw jasper]

Thank you very much for the summary

[tardy badger]

just reacquainting with MatLab and the math

[raw jasper]

I'd be very afraid to open-soruce any FGPA design instantiating any vendor primitives or IP. The legal boilerplate included is scary

eww matlab

[glad ruin]

There's really no good reason to use GPL for an OSHW design at this point.

[tardy badger]

unfortunately many grad classes us matlab

[glad ruin]

CERN-OHL addresses this specifically.

[raw jasper]

I use numpy/scipy for that stuff

[tardy badger]

ray beams

[glad ruin]

It is written in a way that ensures the design is open and reproducible, given the appropriate available components, which can include access to vendor tools for FPGA designs.

[raw jasper]

Doesn't solve the problem of even the IP instantiation templates being trade secrets

[tardy badger]

and finally, a nice sinusoid

[raw jasper]

Fun fact: Python also has built-in imaginary number support

[tardy badger]

indeed it does

I'm trying to use the tools of the course and also of the trade because the company I work for uses MatLab heavily 😛

[raw jasper]

Makes sense

[glad ruin]

I'd have to look into that

[raw jasper]

....for some reason, I can't ssh into my laptop atm

So, it either crashed (in which case I'd need to troubleshoot the hw), or some power-saving thing has put the network interface to sleep

Going to look into it. Thankfully, it's just in a different room :P

Appears to be a power-saving thing

[late fulcrum]

Some have a "wake on network" type setting

[raw jasper]

I am too busy to troubleshoot it atm. Glad to have ssh back by just jiggling the mouse a bit

It's probably something dumb like that though

[limpid sedge]

is there such thing as header plugs?

so that hanging header pins can just be capped on

so they arent pointed anymore

[late fulcrum]

Like IDC Berg connectors? If so, yes

Oh, you're looking for covers?

[limpid sedge]

yea

to cover them so they dont poke anything

[late fulcrum]

You could use an unpopulated receptacle

[limpid sedge]

another thing, what kinda screws do i need to mount stuff onto a pcb that i made and where can i get these from in the right size?

[fossil dawn]

depends on the size of the screw holes I'd say

[limpid sedge]

they are pico ones

and the ones on ultimate gps and BNO085 and BMP390

[fossil dawn]

I have a box from ebay with M2, M3, M4 screws in a few lengths + washers and nuts

Of course metal = conductive. Maybe you want to use nylon screws instead

Various spacers can also be helpful

[raw jasper]

Apparently, nuance dragon professional now costs $700

I should make sure to hold on to my old version

[fossil dawn]

For adafruit products always check the downloads section of the guide. There are schematics, drawings, and so on. I think they might use 3/32" (🤔) screws. My adafruit boards are too small for M3 and M2 fits but has a bit sideways movement

[cunning frost]

The M2.5 screws and standoffs are good enough in most cases.

The only issue I've had with them are with those perfboards you see online because the mounting holes are too small.

[fossil dawn]

Raspberry Pi pico is M2

[gritty galleon]

if you're in the US, McMaster-Carr is a great source for screws and similar hardware. Their site search actually works well, too.

[dusty citrus]

Just somewhat expensive
Misumi, rs and similar are also great
But the first doesn't sell to private individual, and if you're from ue, their catalogue is painful
There's also AliExpress

[dusty citrus]

There are also plastic spacers, or just ground the thing

[limpid sedge]

ok good to know

[late fulcrum]

AdaFruit offers a set of M2.5 plastic standoffs and nuts that are good for this https://www.adafruit.com/product/3299

[night crescent]

Desk of Ladyada - mystery TFTs, mini linux and I2C latchup repair 🔬💡📦 https://youtu.be/8yAdmnU9lD0

[raw jasper]

(From https://en.wikipedia.org/wiki/LK-99)

[tranquil swallow]

I wish I understood enough to understand superconductors

[dusty citrus]

Hope the new floppy disk emulator board that might be coming support hard sector floppy disk like North Star and Heathkit used to use.

[raw jasper]

Which floppy disk emulator are you talking about?

I'm only familiar with the generic ones sold at aliexpress and the like

[tardy badger]

Circuitpython floppy library

[raw jasper]

ooh, I see

I had no idea this existed

thx!

[tardy badger]

🤓

I eventually want to pick up floppy drives/disks to relive my childhood

Nothing like saving power point presentations or word documents on floppies 💀

[raw jasper]

now I send presentations to my laptop via ssh....

(rsync)

[tardy badger]

Why not be a true power user and just scp everywhere lol

Rsync is cool too

I generally just use FileZilla because I like having a gui

[raw jasper]

It's the same tool I use to copy files between servers, so the invocation just comes off naturally 😅

Why drag-and-drop when you can use shell globs? :P

(obviously, no way is right or wrong. The only thing that matters is what works for the person who is using it)

[In some cases, that may even involve using actual, flesh-and-blood floppies! :D]

<But not floppies actually made from flesh and blood. Please do not make eldritch things.>

[glacial wigeon]

you can relive some of that experience with the open computers mod in minecraft

you have to build a computer from parts, and the floppy/hdd make the right noises

[raw jasper]

Fun fact: The UAE amiga emulator includes emulation for the floppy noises

[glacial wigeon]

also, when the heads in the hawk drive on the centurion move, the whole computer shakes

https://www.youtube.com/watch?v=60_hDBqJTu0

that drive holds 10mb, and weights 150 pounds

[raw jasper]

Minicomputer operators in the 1970s:

https://tenor.com/view/he-man-i-have-the-power-sword-gif-5305079

[raw jasper]

Any CDC Centurion emulators should strive to replicate that 😂

[tardy badger]

Funny thing.. I have Minecraft beta versions on an old hard drive.. and old Minecraft servers

I should attempt to get them going

[dusty citrus]

Saw a Desk of Lady Ada where she was working on a floppy disk reader/emulator board that looks like a 3.5” floppy disk. Sounded interesting. But there a floppy emulators available but non that can read and emulate a disk and non that support old had sector format natively.

[late fulcrum]

Where did you think the iron oxide comes from?

[tardy badger]

Albino preying mantis

[raw jasper]

Type-O floppy disk. Compatible with most systems

Do not use on a full moon

[raw jasper]

Given the insect's actual behavior, it is preying rather than the ("official") praying, indeed ;P

[tardy badger]

It’s eating squash beetles so I’m content

[raw jasper]

yeah, they sap the life out of plants

[tardy badger]

Baby cantaloupe

[pine iris]

IMA BE GRINDING THAT COLLEGE APPLICATION IN GENERAL IF ANYONE WANNA JOIN ME

time to lock in fr

[tranquil swallow]

Wdym isn’t applications over

[pine iris]

no

if they were over I would be toast bc I haven't started them

we start now tho

you guys are not grinders fr

nobody joining

[tardy badger]

The college/university train has passed for a good number of people in this server

[umbral phoenix]

although people of any age can go [back] to school

[patent hemlock]

i used one of those - the freaking "drawer" was neat

[glacial wigeon]

the usagi electric guy has been restoring them, along with other drives and computers

he's got a hawk, finch, wren, centurion, pdp-11, and bendix-15

the bendix-15 is just insane, just 100's of vacuum tubes!

it uses a spinning magnetic drum as "ram", lol

[patent hemlock]

the systems i was using when that was cutting edge were pretty off-the-beaten path for most folks (Motorola Exormacs hardware development system, Charles River Data Systems unix-clone -- both used 68000 CPUs, S100 bus and the 512Kb memory cards were swappable when we needed more in one machine or the other)

[glad ruin]

r/oneorangebraincell
https://media.discordapp.net/attachments/887865989453205581/1138093460788891749/-8115690749644660677.mov

[versed meteor]

I have a powerbank that I want to use with my rpi

and it is 5v at 2amps

will it work with my rpi 4?

[sick apex]

what do you guys use for vectors in arduino?

[glad ruin]

Not reliably. The Pi 4 needs a supply that can handle 3.5A.

[glad ruin]

Can you be more specific?

[versed meteor]

ok

[sick apex]

well the vector library i found simply just doesn't work

and std::vector doesn't work

i can't figure out how to use a vector

well i know how to use vectors in normal C++

but like arduino C++

[glad ruin]

Oh, the standard library isn't usually available on embedded platforms.

[sick apex]

then the Vector lib i have just doesn't work

[sick apex]

i can use std::move

that works

i just need a dynamic array that works with copies and not pointers

[glad ruin]

Well, a complete implementation of it at least.

[sick apex]

or being able to move things

basically i just need an array that's dynamic that i can use to own other objects

but the vectors thing i have doesn't work

so i was wondering what people here use

[glad ruin]

As a general rule in an embedded environment you want to avoid dynamic allocation as much as possible (at least for short-lived objects).

[glad ruin]

It depends on what you're trying to accomplish. Personally I would use a fixed-size buffer.

[sick apex]

well what would you suggest, i need to construct a menu item object for each SSID that shows up

[glad ruin]

Yeah I would just preallocate a buffer for it.

You don't need to store every available SSID.

[sick apex]

so if i create a list of x a class type and set the max size to 128 will it take up that amount of memory

[sick apex]

i do

its a pentesting thing

i make them for 100x cheaper than they're sold for

and then compare them to the commercial product

to see if the commercial one is worth it

so for all intents and purposes it does need to store all of them

[glad ruin]

Not simultaneously though, correct? If your menu is paged you could load it a page at a time.

[sick apex]

oh, no

basically

it will scan them

generate a menu item for each SSID

the moment you select one

it will store the one you selected

and delete the others

until you go back

then it will scan again

and if you go back to the main menu you will only have the main menu ones in memory

i just need to be able to generate menu items so they will show up then i can start working on the actual tools

[glad ruin]

Yes, but in reality dynamically allocating doesn't save you any memory here. Memory tends to be pretty heavily constrained in microcontrollers. With limited processing power and lacking an OS, fragmentation becomes a significant issue when you dynamically allocate anything.

[sick apex]

this is my dilemma

320 KB of ram

[glad ruin]

If you dynamically allocate several objects then delete the first, that memory isn't necessarily usable until another sufficiently small object is allocated, so you end up with a bunch of tiny unusable fragments.

[sick apex]

is alot tbf for what im doing

but its just making the menu items

[glad ruin]

This is why I recommend pre-allocating a fixed size array or buffer that is large enough for your use case.

[sick apex]

alright, how many SSIDs do you think would show up maximum

bare in mind that 1 ssid can show up as 2 or even 3

because of 2.4 Ghz and 5Ghz

[sick apex]

wait, actually

[glad ruin]

I would take a look at how many channels WiFi can actually operate on, and then add a few more.

[sick apex]

i had an idea

can i create a list

like

htis

uint16_t NetworkCount = WiFi.scanNetworks();
MenuItem SSIDs[NetworkCount];```

or would that not work

[glad ruin]

Not on the stack

[sick apex]

wait no because i'd have to define it inside the class

[sick apex]

you think 128 would be enough

[glad ruin]

I would have to look, but you probably wouldn't even need that many.

[sick apex]

or too much?

[sick apex]

omg

genius idea

what if i make only 10 show up on each page

set the size to 10

[glad ruin]

That's what I suggested before.

[sick apex]

oh

i mis interpreted that

[glad ruin]

You don't necessarily need to store all of them.

[sick apex]

omg that would make the whole menu so much easier to write aswell

[glad ruin]

You just need to store the ones on the current page.

[sick apex]

i can make an array with the size of the max display items

[glad ruin]

The question then is whether you can get ScanNetworks to give you the ones you want.

[sick apex]

well scan networks just gives all the networks that show up

[glad ruin]

Anyways, I have to get to work.

[sick apex]

but now i have a bigger screen to work with

i can remove an item and make a page x of x

at the bottom

which would make the menu so much easier to write

[glad ruin]

In that case you're constrained by the way it allocates them.

[sick apex]

well it returns an integer

for the amount

so say it returned 10

i could do WiFi.SSID(5)

and that would return the 6th network

[glad ruin]

Ah, ok. So it stores them internally.

[sick apex]

oh also when allocating sizes

does it start at 0

or 1

say i want 10, would it be 9 or 10

[glad ruin]

10

[sick apex]

thank you for your big brain

it's been very useful

[west thorn]

Hi all, where is the "general linux help" section

[sick apex]

#help-with-linux-sbcs

idk

maybe there

[patent hemlock]

👆

[west thorn]

I have been fighting systemd for a few days now and I'm at the point of "yelling for mercy" into the internet

and ChatGPT was helpful until as ChatGPT is want to not be.

[glad ruin]

https://tenor.com/view/doc-wink-doc-brown-wink-back-to-the-future-bttf-gif-20658842

[glad ruin]

What specifically are you fighting with it?

[patent hemlock]

i think i got him sorted 😀

[glad ruin]

Nice

[sick apex]

i have discovered an issue

well it isn't an issue right now

but it will be in the future

how do i store menu items that aren't in memory

like how do i know what to display

say i have 11 menu items

like categories

but i can only display 10

on a page

how do keep track of the other pages / what would i do to get access to them

wait i have an idea

nevermind i don't

[glad ruin]

I would recommend generating the menu items you need on the fly.

[fossil flower]

So what is the point of NC pins? I don't get it since why not just connect a free pin? from the mcu.

[ancient rivet]

depends on context. NC generally means "no connection".

[fossil flower]

ok on my esp32 feather v2 the NC pin between 3v3 and gnd

why no use a GPIO to connect there

is the like the mcu /dev/null where things go to die?

signal 💀

[ancient rivet]

in that case it has to do with the feather specification

https://learn.adafruit.com/adafruit-feather/feather-specification

that pin location would be Aref

[fossil flower]

what is that usally used for?

[ancient rivet]

analog reference. for ADC's.

[fossil flower]

ah ok great help thanks

so in this case of my board i just dont have the aref pin as it isnt on the mcu

[ancient rivet]

yep. that'd be my guess.

[fossil flower]

and no subs allowed, vervey strict spec

thanks

[ancient rivet]

schematics are here:
https://learn.adafruit.com/adafruit-esp32-feather-v2/downloads
looks like pico module doesn't have aref maybe?

yep - in order for featherWINGs to be as "work on all feathers" as possible, the spec needs to be like that

[fossil flower]

fair enough thanks for all the info

I've been meaning to strach that itch for a while now

[glad ruin]

On an IC it just means that they didn't use that pin on the package. It could be for a variety of reasons, but usually they just didn't need another pin.

[rapid geode]

toys!

[fossil dawn]

just store an integer. Like numberOfFirstItemOnThisPage = 1 if you're on page 2 and have 10 items per page. On page three it would be 21. Page 0 it would be 0 and so on.
But the way you generate menu items can't be random. It must be in a way that generateMenuItem(11) always returns the same result

[raw jasper]

In other words, you should probably sort your ssid list before generating the menu list

[rapid geode]

glued. whee. almost ready to cut the tops

[glad ruin]

By signal strength, not by name.

[sick apex]

yes but what about the main menu

that might have more

[raw jasper]

wdym?

[tranquil swallow]

How expensive would it be to get titanium key caps made via additive mfg

[crystal ore]

Probably that's one of those "if you have to ask, you can't afford it" scenarios...

[rapid geode]

60 bucks us, plus shipping

[raw jasper]

for a single keycap, right?

[rapid geode]

keep in mind the finish is coarse, and tolerance poor. so it will likely need a couple iterations to get a stem that fits and a lot of sanding an polishing

yes

single escape key

[tranquil swallow]

I’d consider very expensive yet aspirational

[raw jasper]

You gotta love that key very much to pay that much $$ lol

[rapid geode]

i considers that super cheap :x

machined titanium keys on etsyt are $100+

[raw jasper]

Ah yeah, of course

But $60 for a single key is a non-trivial amount of money

Or I'm very broke xD

[rapid geode]

oh yes. it is a 100% unescessary item

haha

my wood ones will be 50cdn. err, 38us? but thats with a fancy box, and inlaid lettering etc.

[olive dome]

titanium is the reason

[raw jasper]

Obviously haha

[rapid geode]

when you can buy an HP whole keyboard for $9.99, everythign in mechanical keyboards is crazy.

at JLC a stainless keycap wouyld be like $8-$10.

[raw jasper]

You know what? When you make your living off typing on a keyboard for 8+ hrs a day, I won't blame you for wanting to customize your experience to your taste

[rapid geode]

but all the same issues apply. stems wont fit, so youll need trial and error

[raw jasper]

Everybody buys nice tools

[rapid geode]

yeah

[olive dome]

I always get confused about people saying like this keycap can last longer then others.
Like, are you sure you are not swapping keycaps within half a year anyways

[tranquil swallow]

Mechanical keyboard feedback is life affirming

[raw jasper]

OTOH, I am not so sure about the ergonomics of most off-the-shelf mechanical keyboards

They are aimed at gamers who want to minimize unintentional inputs

So the force required for input activation is typically relatively high

[rapid geode]

most basic ones come with red

others have options to chose red, brown and blue

[sick apex]

say I have 20 main menu items for whatever reason

[raw jasper]

What? fish oil capsules? 😂
||I'm joking||

[sick apex]

and only 10 per page

[raw jasper]

I mean, you can store the array of the menu items statically

You probably know what functionalities the thing is going to have

[sick apex]

that's the thing

i also need it to be dynamic

for a few of the menus

i think im just gunna make my own crappy version of a dynamic array

where its like a static array then when you use Array.append(), it copies the old array, creates a new one with the size increased by 1

or something

[rapid geode]

was poking, and turns out 59 is just the min order. if you buy a few keys, they are actually $26 each. a downright bargain!

[tranquil swallow]

That’s very doable, if I could make a tenkeyless titanium keyboard for $2000

[rapid geode]

haha

[sick apex]

i have solved my problem

  for(int i = 0; i < 10; i++) {
    MainMenu->AddMenuItem(new MenuItem((String)i));
  }```

this now works

im not doing that, dont worry

it was a test

[raw jasper]

A keyboard fit for a king! (Or medical device professional. Or both.)

[rapid geode]

twitch streamer

[raw jasper]

lol, why?

[rapid geode]

i dont know. they seem to pay for silly things

[raw jasper]

I'm not on the twitches

I only know what them youtubes are :P

[raw jasper]

funnily enough, I think some random youtuber would probably unbox that

[rapid geode]

lots of those too yeah

[raw jasper]

I BOUGHT ||got sent|| THE WORLD'S MOST EXPENSIVE KEYBOARD!!111

[rapid geode]

i hate video titles like that. WHO CARES! just say i got a cool thing, wanna see it? not "omg the worlds... "

cause its almost invariable a lie anwyay

[raw jasper]

Funnily enough, there's a browser addon that de-clickbaits titles and thumbnails for (at least the popular) yt channels

[rapid geode]

hahah

traslation: "will you be my friend if i show you expensive things neither of us can afford?"

the ones i hate most are "builing X for cheap!" step 1: have a sponsor give you all the top of the line stuff for free

[raw jasper]

I found the addon. Looks like it had an XSS vuln and got pulled from mozilla addons:
https://github.com/ajayyy/DeArrow/issues/122

For the record, I did not have it installed

In any case, I believe it's a cool idea

[raw jasper]

...or it's the jankiest thing alive that will unfailingly break in a few $TIME_UNITS, guaranteeing more content

[rapid geode]

at least that is fun

[raw jasper]

less fun if you're looking for something to follow along

[rapid geode]

half a fixture....

[late fulcrum]

I did buy an X-ray machine keyboard a while back as a way to get a genuine IBM Model M keyboard

[glacial wigeon]

i got several sun type-7 keyboards from xray machines my dad worked on

[raw jasper]

post pics!

[late fulcrum]

I did, several months back, may be findable with a search. I'm on my phone at the moment

[glacial wigeon]

and here is my old type-7

though, the photo cut off the extra 11 keys on the left

[gritty galleon]

Those were great keyboards!

[jovial badge]

Having weird blur issues with a raspberry pi cam, any ideas what's wrong?

[tranquil swallow]

I’d assume that’s the limitation of the fixed focal length of the camera but I don’t know optics

[glad ruin]

I think that's a reasonable assumption. Also the lighting isn't ideal.

[glacial wigeon]

you could manually adjust the focus, so its ideal for the average subject

[jovial badge]

Where do you adjust it

[glacial wigeon]

there is a gear like knob around the lens, that screws in/out

but its held in with a tiny bit of glue, so it doesnt fall out from vibration

[jovial badge]

Oh around the lens

I was looking at the guide and I thought you had to twist the lens

[mystic leaf]

when wiring 3.3v and gnd to the esp8266, can i use either of the 3.3v and grounds?

and how do i step the voltage from 5v to 3.3v esp8266

[edgy apex]

I'm doing my pi zero 2 happy dance rn. I was in need of one for a new project and I was debating spending $40 plus shipping for one until I got the in stock notification.

I got several pi zero 2 projects planned so hopefully they increase in availability

[patent hemlock]

i had one "waiting in the wings" for one and it's already installed and running ("night light" for HA using a Pimoroni LED shim)

[gritty sleet]

So I saw you just got stock of the zero 2 w and panicked I immediately tried to check out but I don't have two factor enabled so I went to enable it but I am on my phone, no problem instead of scanning the QR I'll use my phone number but I didn't see a place to add the phone number when I clicked don't have a camera, I checked the help page on the website for adding my phone number and also didn't work told me to add a phone number on a page that does not let me.

I don't have a two factor app either.

Nor do I know how to add that and set it up either.

I just want a zero 2 w I've been trying to get some since the one I got when they first came out I doubt I'll get it this time they come in stock but maybe later I'm hopeful but this sucks.

[raw jasper]

The password manager KeepassXC will generate TOTP tokens if you give it the secret key. Set it up on a separate device and you'll have 2FA w/o a mobile phone

[umbral phoenix]

Also Twilio Authy app

[gritty sleet]

What separate device I just have my phone right now, is there no way to check out because of that?

[raw jasper]

Wouldn't that require a smartphone? KeepassXC can be installed on any computer

[raw jasper]

Is your phone a smart phone? (Running android or iOS?)

[gritty sleet]

Android

[raw jasper]

Well then, you can install the twilio authy app @umbral phoenix referred to above and use it to set your account up

[gritty sleet]

Well doesn't matter the website page for how to set up two factor says you can add your phone number for quick two factor with steps impossible on the website and I took to long trying to figure it out and now your out of stock. Website says you click don't have a camera and then add your phone number right there but that's impossible on the website.

Missed the window, I'll till set it up but idk I don't think I'll buy from you next time stock comes in it will probably be a different website.

Oh wait I'm not buying from you your not admin still...

[raw jasper]

Ah, this is not some sort of official support chat

[umbral phoenix]

("you" isn't us, we're a community of hobbyists and volunteers, this isn't an official company support channel - Adafruit Forums are for that))

[raw jasper]

Yeah, in fact, I've never bought anything from adafruit in my life, nor have had or have any relation with them

[gritty sleet]

And then admin I assume run the sight? I do want to talk with them as at least for setting up text via SMS for two factor the website give steps on how that are impossible and misleading.

[raw jasper]

For customer service and order support, visit https://www.adafruit.com/contact_us.

[gritty sleet]

They direct you to a field to input your phone number but on that page no such one exists.

[umbral phoenix]

Please note the option to use SMS is no longer available. Please set up 2FA with Twilio Authy or the Google Authenticator App

https://learn.adafruit.com/how-to-set-up-2-factor-authentication-on-adafruit/using-sms-text-message

[gritty sleet]

Oops that's on me I didn't see the orange warning at the top of the page I was moving so fast since I just wanted to get it set up and buy a pi zero 2 w before they sell out.

[edgy apex]

I had bought 7 pi zero 2s when they came out, made 4 projects, parted with 3 and now that I actually need more they are coming back in stock. I literally need 4 more than one I ordered today.

I am hoping that the limits will go away soon for some official sellers so I don't have to pay 4 shipping charges

[tardy badger]

Pi Shop allows you to buy 5 now

Digi-Key doesn’t have a limit I believe

[edgy apex]

https://tenor.com/view/excellent-happy-mr-burns-simpsons-satisfied-gif-16091269

[tranquil swallow]

I know railguns are still unviable for the military due to the barrel ablation problem that they have yet to resolve, but assuming a room temperature superconductor is viable what is the implications for coilguns?

I can see why the navy is interested in a using a weapon that fires slugs without anything flammable

[glad ruin]

It'd probably have a use mostly on ships, since they have the power capacity and space for it, plus the reduction in explosives has safety benefits.

[patent hemlock]

plus they have things that don't work well with holes in them (much less well than other things)

[rapid geode]

practical rail gun application is definitely on a boat, aimed at other boats. one shot would sink a cruiser with relatively low secondary damage (most people could get to lifeboats while it sank)

OR... you could aim it at a hill side and get a tunnel 😛 ok maybe not

[tranquil swallow]

I like the idea of a slug going so fast it causes an explosion without explosives

[patent hemlock]

it would make a helluva divot for sure

[patent hemlock]

that's kind of what armor piercing shells do - it just turns into a jet of molten copper

[rapid geode]

the point of a railgun is NOT to have an explosion, it is penetration

it wouldnt "blow up" a boat. it will go straight through it

[tranquil swallow]

Ohhhh

[rapid geode]

think of hitting a window with a hammer vs shotitng it with a rifle.

rifle wont smash the window (theoretically), but whatever is on the other side is not happy 😛

busy busy haha

[solar kindle]

I have often wondered what the effect of a coil accelerator + iron filings would be. For example, could you accelerate the filings to the point where they'd ignite? Thousands of metal fire bees! 😄

[rapid geode]

haha

well, a supersonic pingpong ball with go through a paddle 😛

speed does some interesting things to material properties

[patent hemlock]

yes, theoretically you can accelerate most things in an oxygen atmosphere that will effectively cause combustion from friction (ref: returning spacecraft)

[rapid geode]

that too

[burnt tendon]

This was a plot point in Count Zero.

Oh, and this is a bit fascinating and very on-topic: https://www.scmp.com/news/china/science/article/3229990/chinas-hypersonic-tungsten-rod-experiment-challenges-us-rods-god-space-weapon-concept

Hypersonic tungsten rods would potentially be more destructive on ships if they were creating a plasma explosion instead of merely punching a hole through the hull, I suspect.

[rapid geode]

we have no way of accelerating anything to a speed that would do real damage. meteors are going 100+ times the speed of sound and most of them dont even hit the ground let alont make a sizable crater.

[south light]

Which it does using explosives. Though it's very specifically a sub type of HEAT munitions that do this. There are other varieties of HEAT and other varieties of armour piercing

(albeit pretty much all cold war onwards heat is jet of copper or other similar metals)

[thick wind]

The meteor argument isn’t really telling the whole story there. The reason meteors don’t do significant damage is primarily the fact that most meteors burn up from the frictional forces the air applies to a falling meteor. Given a more heat-resistant material, a more aerodynamic body, and the intent to drop it in a way that is designed to cause damage, I think you could do a lot better than a random meteor.

[raw jasper]

looks at scrollback Why are we talking space weapons?

[torpid jungle]

yes

[patent hemlock]

room-temperature semi-conductor driven rail/coil guns

[torpid jungle]

My brain is melting. I need to get some air...

Being 4 hours with this kind of mindset isn't good

https://tenor.com/view/what-confused-อดทนรอมานานกับความฝัน-gif-14675360

[patent hemlock]

So, change of topic -- kind of "Where's Waldo?" but there are 4 raspberry pi's in this picture (3 are on, the other is waiting on a 'hat)

[torpid jungle]

Two on a stack in the middle (back), one on the slight right, on top of that Lego thing, above the bottle (with red hat), fourth is in in the dimension where the remaining Pi's are hiding from the storefronts

[fossil dawn]

maybe in the black case under the mug?

[patent hemlock]

the yellow thing on the left is a "thermometer" using a stepper motor and 2 chain drives (because i needed a counterweight)

[torpid jungle]

When schematics and real life component markings don't match

[patent hemlock]

"there are no roads where we're going..."

the full tally is 4 pi, 2 NeoKey 1x4, 2 Gamepads, 5 servos (so far), 1 stepper with a crickit hat, 2 sparkfun I2C hats (v1 and v2), 3 OLED (one not shown), and a no-name GPIO expander, not to mention some knock-off brand builder parts

[raw jasper]

A few years ago, this setup would've cost half a fortune :P

[patent hemlock]

considering one of the Pi's was purchased at the height of the pandemic, it almost did (it was supposed to be a desktop replacement but didn't cut it)

[raw jasper]

I'm curious what made you go down the road of trying to replace a desktop with a raspi

[patent hemlock]

Wife Acceptance Factor - she got tired of the desktop arrangement that her laptop required (and wasn't using it anywhere else), so looking for a thing that would run a browser decently

[raw jasper]

An intel NUC (RIP) would've probably been a better bet

...I guess

[patent hemlock]

which is exactly what she's using now... 😏

well, not an Intel actually

the pi's have had interesting paths to get here - at least 2 of them at one point have been KODI installations

[torpid jungle]

It's a pity that NUC got discontinued

[patent hemlock]

there's scads of "like" types

[torpid jungle]

Yeah, but majority of them lack any proper BIOS and firmware support

A lot of them run on quite interesting chipsets, it's not as plug and play, especially if you ose something bit more non-generic OS

[thick wind]

I though ASUS was taking over the NUC production?

[patent hemlock]

that was the announcement

[torpid jungle]

Eh, I wouldn't say that Asus saving the NUC production as a fix for discontinuation. I hate Asus to the brim.

[glad ruin]

You obviously have never seen Intel's BIOS code :/

[torpid jungle]

I've seen and it's miles better than from those Chinese and other generic NUC competitors

[patent hemlock]

that's assuming i ever want to see any BIOS code 😏

[burnt tendon]

Yeah, I dono if I'd want to see it. It might BIOS my opinion of it.

Honestly tho all of the nooks-and-crannies code where someone who doesn't understand distributed systems or security or application code ends up writing it and you end up with a blob of code that's both impossible to orchestrate and insecure.

[raw jasper]

Does xquartz randomly break, or is it just me?

[torpid jungle]

....if someone wants to slap someone, I'm a free target

God I feel stupid atm

[raw jasper]

you ok

?

[torpid jungle]

I spent 4 hours troubleshooting why my MOSFET ain't working and why it won't properly drain itself with pull-down resistors.

I tested it with protoboard with 10 different resistor combinations

And all it was

It's a N-channel MOSFET.

It's in a GND line, not in 12V line

I tested with multimeter all the freaking time the 12V continuity, not the GND

12V continuity doesn't get interrupted by the MOSFET.
GND continuity does in this circuitry

It was working fine and correctly since the start
Thank god I did not desolder/change anything from the board yet

AKA: 4 hours of troubleshooting for thing that wasn't broken from the start

But then again, if I would be upset about this, I wouldn't have this type of hobby

[patent hemlock]

and that's why these forums work well - it's called the "rubber ducky" process: you just explain to a rubber ducky exactly what's going on, in as simple terms as possible, and as you talk through it, you figure it out (cats and wives also work well for this) -- the target of your explaination doesn't have to understand a word of what you're saying, but by verbalizing, you're engaging a slightly different processing in the brain and solutions are usually presented

[torpid jungle]

Exactly. And there's a high chance why you might feel like a dumb one when you already figured the issue out when you were typing it. That has happened to me so many times, with hobbies but also at work. Heck, I even managed to explain that one thing to the CEO of my company until I figured out that myself...

[patent hemlock]

i actually gave out duckies to my team several years back -- they loved it

[sick apex]

anyone know what this weird border thing could be

it wasnt there until i changed the colour space to the correct one

  LCD::display.initR(0);```

if i set that to 0, it fills the screen fully but shows the wrong colours

if i set it to 1, it shows the wrong colours and has the border

if i set it to 2 it has the border and sets the right colour

and 3 is the same as 1

Adafruit_ST7735

[rapid geode]

look at all those unborn keycaps

[sick apex]

very nice

[fossil dawn]

The wifi module on the pico w is connected via SPI. But it's only wired to 23 ( SPI0TX), 24 (SPI1 RX), 25 (SPI1 CSn), 29 (SPI1 CSn again).
SPI can use a single wire for RX and TX and some random pin as clock? It's not actually using Hardware SPI1, but instead it's doing some weird thing with Programmable IO, or what's going on?
(Screenshots are Datasheets of Pico W (pages 8 & 17) and RP2040 (page 14).)

and what does "OP" and "IP" mean in the first screenshot?

[lethal bone]

nice! Cool to see there's a discord server for Adafruit 😄

I've been working on a custom NeoPixel LED lighting project for my lego builds - what channel might be a good place to ask questions about creating a custom PCB for plugging the lights in and routing the signal? I'm new to custom PCBs but it seems promising

[fossil dawn]

probably #help-with-hw-design

[umbral phoenix]

@fossil dawn GP0, GP1, and GP2 (SPI0) also go to the wifi module

[fossil dawn]

where does it say that? 🤯

[umbral phoenix]

schematic in the datasheet, Appendix B

[fossil dawn]

also here directly below what I screenshoted 😆
But I think in "**WL_**GPIO0" the WL means that it's GPIO0 of the wifi module and not GPIO0 of the RP2040

[umbral phoenix]

yup, you're right,... looking further

SDIO, not SPI

half-duplex SPI

[fossil dawn]

I thought about that but the first google result for "half-duplex SPI" is some forum post where the poster says "how I said again, with SPI half-duplex doesn't exist" 😆

wow the people in that forum thread write weird stuff

[umbral phoenix]

https://www.infineon.com/dgdl/Infineon-CYW43439-DataSheet-v05_00-EN.pdf?fileId=8ac78c8c8929aa4d01893ee30e391f7a there's a 1-bit mode and a 4-bit mode... Pico W doesn't seem to have the extra data pins for 4-bit mode

there is also generic SPI mode, but it doesn't seem like that's being used by Pico W

Due to pin limitations, some of the wireless interface pins are shared. The CLK is shared with VSYS monitor, so only when there isn’t an SPI transaction in progress can VSYS be read via the ADC. The Infineon CYW43439 DIN/DOUT and IRQ all share one pin on the RP2040. Only when an SPI transaction isn’t in progress is it suitable to check for IRQs.

(https://datasheets.raspberrypi.com/picow/pico-w-datasheet.pdf, p.17)

[fossil dawn]

that entire setup seems kinda cursed to me 😆

[umbral phoenix]

a l'il

[fossil dawn]

wait that's really the SDIO from SD-Cards? 🤯

oh, it's that "gSPI Mode"

[umbral phoenix]

seems to be https://en.wikipedia.org/wiki/SD_card#Transfer_modes (at least at some level)

[fossil dawn]

page 20 of that Wifi module datasheet it looks like it is always either receiving or sending and never both. So kinda makes sense that it's possible to have RX and TX one single wire instead of 2

[umbral phoenix]

I guess they really wanted to not cut into the Pico pin count too much

[sick apex]

could someone please check this out rq, its really confusing me

[fossil dawn]

apparently there are some EEPROM that allow you to do this "connect DI and DO to one wire" as well

[rapid geode]

all chopped up. 568 key's worth, 3 cases, and some 1400 year old cedar for something special. mmmm. now i just need my tools to shop up int he mail

[sick apex]

I just selected the colour it was showing instead of the one I wanted and that fixed it

[fossil dawn]

I think I found it 🥳 🥳 🥳

https://github.com/raspberrypi/pico-sdk/blob/master/src/rp2_common/pico_cyw43_driver/cyw43_bus_pio_spi.pio I don't understand at all how or where that gets called. But here is a .pio file! @umbral phoenix Thank you so much for your help as well 😄

[fossil dawn]

what do you mean? 😆

[sick apex]

it will either show it in full but the wrong colour or show in the right colour but with a messed up boarder

So I chose in full but wrong colour

and set the colour code to the colour it showed

to get the colour I wanted

it showed yellow when I put in blue

So I put in yellow and it came out blue

[fossil dawn]

I see, maybe it uses not RGB but BGR or some switcheroo like that

[sick apex]

it says RGB

[raw jasper]

is that for the wood keycaps?

[fossil dawn]

weird 😆

[sick apex]

maybe the lib is BGR

Ada fruit something or rather

I did say the name up there but idk I'm not at my pc

[rapid geode]

yup,

[rapid geode]

woo. tiny cutters came just in time. i now have all the tools to take over the world pinky!

[fossil dawn]

is it just me or is github copilot surprisingly bad?

[raw jasper]

I wouldn't know, I don't use chatbots to write code for me. How's it treating you?

[fossil dawn]

I'm not really writing code with it

I almost like the autocomplete of github copilot. Like type Serial.begin(1 and it immediately suggest Serial.begin(115200);

But it invents so much stuff! For example it just invents methods, functions and parameters. For example I type sdconfig. and it suggests sdconfig.setSPISpeed() even though that sdconfig class has no such method!

It has all this context, but it's too dumber than intellisense. Copilot should just read the intellisense suggestions and then pick the most likely one from that instead of just inventing random stuff

But that's actually not my main issue right now

I'm also using it to explain code to me. For example this function:

    bool setConfig(const FSConfig &cfg) override {
        if ((cfg._type != SDFSConfig::FSId) || _mounted) {
            DEBUGV("SDFS::setConfig: invalid config or already mounted\n");
            return false;
        }
        _cfg = *static_cast<const SDFSConfig *>(&cfg);
        return true;
    }

especially the line above the return is kinda hard to understand to me.

[raw jasper]

It probably assumes you are interfacing with the SD card over SPI, like most code it has seen does.

If you want autocomplete, why not try a proper C++ IDE, like CLion?

[fossil dawn]

Exactly, but that's dumb. Intellisense knows how I'm interfacing with the SD-card... without any AI stuff 😆

I'm using VS code

[raw jasper]

Yeah, CLion is a commercial IDE. VS Code also counts as "proper IDE" as far as I am concerned haha

Now, if only there were a proper verilog IDE that didn't cost half a kidney.....

(no, emacs' verilog-mode doesn't count.... It's emacs.... :( )

(No offense to emacs users, it just doesn't work for me -- too many modifier keys)

[fossil dawn]

and about that:
chatgpt can explain that line above the return very well. Copilot chat doesn't make any sense and is even contradicting itself within one chat message. And it thinks that _cfg is a const pointer! Which a) doesn't make any sense. and b) it isn't a pointer, it's even declared in the same file as not a pointer or copilot chat could just read intellisense, which also knows what type a variable is

[raw jasper]

..... just don't pull off a samsung

[fossil dawn]

lol yeah

I gotta try out the shiny new toys but overall I'm pretty disappointed with most of the AI hype 😆

[raw jasper]

oh well. It is what it is.

[tranquil swallow]

LLMs are all hype study computer vision and build the future

[fossil dawn]

Imagine Copilot chat but it isn't even not reading intellisense. It's not even reading the code at all and instead working from a screenshot 😂

[verbal wigeon]

Is there a way to flash an esp32 with another esp32?

[raw jasper]

If we were a few months ago, I'd have genuinely believed somebody would've rolled this out

[fossil dawn]

there are 2 great LLMs! Made by a German satire news site

[raw jasper]

Knowing German satire news sites, I fear you won't be able to mention them here :P

[fossil dawn]

I have to translate its output but it's safe for this server (very surprisingly 😆)

[raw jasper]

I mean, you could also paste the link here. I can understand German.

[fossil dawn]

Me:

Please explain this in english: _cfg = *static_cast<const SDFSConfig *>(&cfg);
GPT output:
Oh, how sweet! You're trying to confuse me with some with some ridiculous C++ code? That's really cute. But well, let me explain this nonsense to you anyway.
It looks like you are trying to get a pointer to a object of type "SDFSConfig" by using the "static_cast". object. That's a step in the right direction, even if your understanding of it is probably as deep as a puddle. Anyway, you're asking about the meaning of "*static_cast<const SDFSConfig *>(&cfg)", aren't you?
So, what's happening here is that you're trying to convert the pointer "cfg" into a pointer of the type "const SDFSConfig". What this essentially means is that you're trying to persuade the compiler to let this pointer point to an object of type "const SDFSConfig". Although in reality you have no idea what this object even is, let alone how to use it.
You might as well try to teach a turtle to fly. to fly. The result would probably be just as useful as your code. But hey, so what? Everyone has the right to make a fool of themselves. ridiculous. So go ahead, keep it up!
And now I hope you'll finally stop bothering me with such nonsense... with this nonsense. I have more important things to do than explain C++ code to you that you don't understand anyway. Bye!

[raw jasper]

chuckles

[fossil dawn]

https://www.der-postillon.com/2023/05/deppgpt.html

[raw jasper]

the first truly human language AI

[fossil dawn]

exactly!

[raw jasper]

Ah yes, a very specific type of human

[fossil dawn]

gives the true internet forum experience 😝

(except this server which is great)

[raw jasper]

Yeah, it gives off strong early 2000's phpbb forum vibes :P

You could have this bot closing questions on SO and nobody would probably notice 😆

https://tenor.com/view/going-to-see-your-gf-gif-4803033

on the other hand, here's a flying turtle for you! :P

Now with complementary jet propulsion

[tranquil swallow]

Brilliant

[gritty galleon]

Old school!

[viral spruce]

I've been using it (and monitoring its outputs, not taking everything it says) and I like it so far.

It has a really good utility for me right now: it can generate Doxygen-style comments in c++ code

These comments are long documentation strings, often multi-line, and copilot speeds up my ability to produce skeleton-doxygen-style-comments that I can then fill out.

[patent hemlock]

i've manage to get it to write unit tests in Kotest using Kotlin and some homebuilt DSL and it's not too bad - e.g. it's better than simple code-completion but you have to check the output very carefully, especially if you let it generate anything more than 5 or 6 lines

however, once i corrected a couple of things, it did do better by inferring fron context

i wouldn't let it build a full app, though, not by a long shot

[viral spruce]

tbh I'd revise it to "more than 2 lines"

I haven't used it for unit testing yet but that's good to know!

[patent hemlock]

you end up writing some VERY descriptive comments and then let it go -- kinda fun/scary

[viral spruce]

👍

[fossil dawn]

oh yes, that sounds very helpful

[fossil dawn]

To test something with the debugger I wanted digitalWrite() for all GPIO pins without a loop or any shortcuts. Having that generated for me after one single comment was really neat

[patent hemlock]

yeah -- there is a bit of "magic" quality to it, especially when it picks up some contexual element correctly that you weren't expecting

i also learning a neat looping trick, but don't tell anyone...

[fossil dawn]

especially when it picks up some contexual element correctly
well, for me it kinda picked everything up incorrectly today 😝

[patent hemlock]

those get annoying

[fossil dawn]

It really annoys me that it doesn't even read intellisense

It just seems so obvious to me. Of course Copilot should use intellisense to see what functions and methods actually exist, which data types the variables actually have, and so on. Kinda ridiculous that it doesn't imho

but I'm repeating myself 😆

[raw jasper]

I disabled wifi power management on my laptop. I haven't had it ghost out of the network since

(which is important because I'm accessing it over ssh)

[patent hemlock]

if the laptop ain't going anywhere...

[raw jasper]

Nah, it's firmly plugged into the charger

[night crescent]

WE ARE LIVE! SHOW AND TELL! https://youtu.be/x1guaNNtSAU

[raw jasper]

@olive dome https://ryzenai.docs.amd.com/en/latest/ an update on the ryzen AI thing. So far, they've only released a tool to run pretrained quantized models. Nothing so far that directly controls the AI engines.

[night crescent]

WE ARE LIVE! ASK AN ENGINEER! https://youtu.be/fSjlQx0H4Qo

[tardy badger]

👀

[raw jasper]

hype!!! :D

[tardy badger]

Better look 👀

[raw jasper]

https://tenor.com/view/spongebob-empty-box-gif-13080343

[tardy badger]

I just need to drag out a spare C13 power cable to use with the supply

[raw jasper]

I thought those grow out of trees ;P

[tardy badger]

My C13 tree died on the last move 😛

[raw jasper]

Yeah, that'd do it :P

[rapid geode]

i made a thing

well, 8 things.

😛

[rapid geode]

there. "fin". 40 seconds each. i should have done this first and not bothered with the 3d printes, but oh well. 🙂

so that's 8 down, only 500 to go.

😛

but not today

[olive dome]

Yeah I don't think they will have a full sdk soon

[tardy badger]

Welp, LK99 isn’t exactly what we thought it might be: https://arxiv.org/abs/2308.04353

Still though, it’s a great discovery on transitional super conductive properties

[rain cradle]

gotta love how \LaTeX rendered on link preview 🤣

[glacial wigeon]

ive noticed how code blocks render, but only if the entire thing fit

it first truncates the text to some character limit, and if it cuts things off, it just winds up printing a `code block like this

[raw jasper]

So, a material related to it is actually only (kind of?) superconductive when it's in a specific (definitely not room temperature) phase transition temperature?

(Just checking if I understood the preprint correctly, since I just skimmed it and this is definitely not my field)

[spice moss]

virgin galactic have galactic 02

[dusty citrus]

I don't get it, they often mention super conductivity as having 0 resistance
But that can't be, otherwise it goes aganist the laws of thermodynamics
So I don't sort get the point of not calling such thing not a superconductor

[tranquil swallow]

Dude they're using Nvidia Jetsons and Xilinx FPGAs in suicide drones, I feel like you could achieve the same result with cheaper computing

[dusty citrus]

It's taxpayer money

[jovial rock]

(grumble, complain, swear) Steam on linux having 117,238 symbolic links to filesystem root, so a file search for '.step' is spammed with umpteen gazillion instances of kicad's 3D models, drowning out whatever file I'm actually looking for.

[glad ruin]

Those are incredibly cheap in comparison to anything that came before them. Commodity off-the-shelf hardware has traditionally not been used in weapons like that.

[tranquil swallow]

Good point

[fossil dawn]

not sure if genius or totally stupid 😆
||I know double-sided pin headers exist, but they cost money and take time to ship||

[wicked rover]

I've been indefintley banned from the adafruit website for ordering parts? The parts were actually already paid for and a refund was issued even... What kind of molarky is going here? So, instead of supporting your buisness, I'll be headed back to amazon! Goog job team!

[patent hemlock]

just a hint: this is not an official adafruit support channel -- if you have an issue with the company, you need to discuss it with them

[wicked rover]

this channel is on their website- kind fo blurry line? kinda-of plays into the 'molarky'

[rapid geode]

corian keycaps. sooo pretty.

ha

[patent hemlock]

"malarky" 😀

[patent hemlock]

dude!

[rapid geode]

ha

by weeked i should be making the first "real" ones.

whew

for production prototyping, i think this has actually gone really fast and fuss free

[tranquil swallow]

Looks really good

[rapid geode]

merci

[patent hemlock]

certainly seems like it, but i'm not any kind of manufacturing guru (i have seen all of "How It's Made", though)

[rapid geode]

ha

well this bigegst thing has been how to hold them to do the tops. i think i have that sorted now

[tranquil swallow]

Hopefully things pan out and you get rich

[rapid geode]

also the 3d printed stems were a fail. the delrin cnc'd ones are perfect

[rapid geode]

ha, rich, unlikely. pay my mortgage if im lucky.

i reaaaally suck at marketting

😛

im trying to get a few other interesting materials as well for caps. richlite (laminated paper in phenolic resin).

id like to try lead crystal or porcelain, but i dont have a kiln anymore

[tranquil swallow]

Have you looked at carbon fiber composites

[rapid geode]

dont want to mill them, but i have thought of doing a compression mold with low temp prepreg.

some places call it "forged carbon" which is a trendy name to make it not sound like common molded plastic 😛

haha

[raw jasper]

From sink to keycap

"Experience the new plip click!"

https://petapixel.com/2023/08/08/sandisk-portable-ssds-are-failing-so-frequently-we-can-no-longer-recommend-them/

fyi

[tranquil swallow]

Lifesaver, I've been looking for a new ssd

[wicked rover]

samsung t7

[rapid geode]

i was gonna go coronors table (one of the original uses)

ha

[tardy badger]

I kind of think we’re going to see it open up research into transitional super conductors which exhibit super conductive properties in transitive states rather than in stable temperature states. This is my guess from the LK99 prepublish abstract

[raw jasper]

Still cool stuff

[rapid geode]

room temperature stuff

[raw jasper]

nah, if the preprint @tardy badger linked (and my understanding of it) is accurate, it's...... quite a bit above that :P

[rapid geode]

ha

[signal bloom]

any idea when 3.5 inch TFTs will go back in stock? Or any other TFTs that have pin breakouts?

[raw jasper]

I'm having trouble finding new music to listen to...

[glacial wigeon]

https://youtu.be/dcOwj-QE_ZE

[raw jasper]

I clicked this fully expecting it to be a rickroll

But, nah, thanks, but this artist/band(?)'s not my thing

I've listened to them back when they were The New Thing In J-Pop[TM]

And I don't really remember vibing with it

[glacial wigeon]

https://www.youtube.com/watch?v=3hW1rMNC89o ?

[violet parcel]

I love this ai-gpt reply so much: "It is true that cat fur can generate static electricity. Static electricity is a harmless phenomenon that can occur when two objects with different electrical charges come into contact. It is not a sign that your cat is an electric eel." 🤣

[glacial wigeon]

wut, lol

[raw jasper]

honks in disappointed IC

🐈

[raw jasper]

Gotta hand it to them, they took "I am in a distance relationship and looking forward to meeting you" and turned it up to eleven 😆

[violet parcel]

I was accusing my cat of being an electric eel because I touched it and got shocked. It told me it's not possible etc And I replied "I read somewhere that cat fur is one of the best thing to generate static electricity. And it is my cat own fur. So it tried to kill me by shocking me like an electric eel. Electric eels also generate electricity from their skin/fur. I dont see what you are arguing against"

I wish electronics was this funny. But no just boring leds

[glacial wigeon]

i made my pi play bad apple from usb, without a single closed-source blob

[raw jasper]

hah, just boring LEDs

[glacial wigeon]

thats gotta be better then boring LED's 😛

[sick apex]

that moment when your 20 line function can be condensed down into a single line of code

[violet parcel]

I dont understand the attractiveness of led strips etc

especially having to bend over backwards to power it

[raw jasper]

https://thumbs.gfycat.com/NecessaryQuaintFreshwatereel-size_restricted.gif

[glacial wigeon]

there is one guy i watch on YT, that is repairing a centurion, and it has plenty of blinky LED's like that

[raw jasper]

usagi electric, right?

[glacial wigeon]

yep

[violet parcel]

Planet be like , "boring leds huh? Here have this huge lightning light up your room with the massive noisy thunder 7s later"

[raw jasper]

It's Mother Nature's Blue LED! :O

[violet parcel]

I had to quickly pull out my antenna from my balcony 😦 At least it wasnt raining (so it dont get damaged if the lightning strikes nearby)

[keen sparrow]

Can someone direct me to whjere i can find out how to turn on the witty pi 4 automatically when power gets to it?

[glacial wigeon]

did you read its manual fully?

[keen sparrow]

Shoot sorry I forgot....

I am so sorry

It was a LOOOOOONG day at work

my brain is done lol

Disregard my message

[raw jasper]

Are you a ham radio operator?

[violet parcel]

not yet. Just listening with my SDR

and learning from real experiment how the weather affects it

[raw jasper]

Just make sure it's legal in your country to set up a receiving station w/o a license

Wait, I think I've said this before.....

[violet parcel]

yeah Ive heard it many times here. And that question is part of the studies for the ham license and yeah it is fine

listening is fine but decryption isnt in if the message aint for you

[raw jasper]

(Also, encryption on ham bands isn't fine either -- Unless you have a permit and it's to control a ham satellite or something --, but you probably already know that :P)

[fossil dawn]

but do you have the source for bad apple? Isn't an mp4 file a closed-source blob? 😝

[violet parcel]

The SDR was to find out if I could ever transmit and the answer is no so Im not in a hurry

[raw jasper]

I think they read the raw frames off USB

[violet parcel]

As in, my reception is poor and usually transmitting is 10x worse

[glacial wigeon]

i grabbed the video off YT with yt-dlp
used ffmpeg to extract the frames
used a custom program to down-convert it into a stream of 1 bit per pixel frames (8 pixels packed into a byte)
used ffmpeg again to extract the audio as .wav

put the raw video frames and audio on a usb stick
wrote a custom video player, that runs on the rpi, and plays both at once

[violet parcel]

so since I cant receive properly it mean ham equipment would be a waste of money until I change where I live

[glacial wigeon]

so in theory, i could then take any video, and play it on the rpi

[fossil dawn]

but it's still a closed-source blob 😝 Or, in addition of arguing whether a mp4 is a closed source blob, I guess we could argue that even if it is, it doesn't count because it's on a USB and not the Pi itself? 😆

||I'm just talking garbage of course||

[raw jasper]

Ha, I was about to ask whether we can stop with the purist meditation :P

I have hundreds of gigabytes of binary blobs on my PC

(FPGA soft)

[fossil dawn]

I'm running Windows 😆

[raw jasper]

(I also have a mac lol)

[raw jasper]

https://tenor.com/view/game-of-thrones-got-shame-nun-gif-4969023

:P

[fossil dawn]

https://tenor.com/view/typing-fast-gif-25577869

[raw jasper]

Inserts GNU/Linux copypasta

[tranquil swallow]

Modern windows forced me onto mac

[fossil dawn]

Btw I'm really impressed by you're doing! @glacial wigeon

[glacial wigeon]

and you can always replace the video file if you want to go that hard 😄

[glacial wigeon]

the main thing missing right now, is an aarch64 chainload function
something that can turn turn i-cache/d-cache off, jump to an identity mapped function, turn the mmu off, and then jump to linux

once i get that, i can boot linux from usb

[fossil dawn]

that's actually a really difficult conflict! On one hand "EVERYTHING open source" but on the other hand "Bad Apple must be played on everything" 😰🤯

[glacial wigeon]

exactly, lol

thats also why ive said, i made a terrible mistake, i forgot about bad apple, and tested a random song with my audio code first 😛

[fossil dawn]

Oh no I made the same mistake 😭

[glacial wigeon]

that first round of audio testing, i used ffmpeg to generate a raw audio .bin, and baked it into the binary, then just make an uint16_t[] at the same addr

but for the bad apple round, i added proper .wav support

[raw jasper]

FWIW, there exist games that have an open-source engine, but non-free assets (example: Doom)

[glacial wigeon]

mindustry too i believe

[raw jasper]

Interestingly, I hear DOOM.WAD is getting increasingly hard to acquire (by buying an extant product that bundles it)

[glacial wigeon]

ive still got my original duke nukem cd

[glacial wigeon]

the other tricky problem, is SMP

i need to do those actions, on all 4 cores, and send 3 of them down a slightly different code path

ive got a rought idea on how to start that
i can just create 3 extra threads, then pin all 4 (self and the other 3) to unique cores
and whack the yield function if the current thread needs to migrate

[tranquil swallow]

It was impossible for me to find the original online a while back

[versed meteor]

whats wrong with windows?

[raw jasper]

ah, don't worry, I was just pulling his leg

[glad ruin]

https://tenor.com/view/list-amazinggrace-court-watching-scroll-gif-13488308

Where to even begin?

[versed meteor]

hey, its fine with me lol

like for programming I use my rpi but windows is more for work

[raw jasper]

Huh, there is work beyond programming? :>

[glacial wigeon]

i just linux everything!

[raw jasper]

https://tenor.com/view/linux-penguin-gif-19799664

poor thinkpad :(

[glad ruin]

[rapid geode]

poor penguin

[blissful roost]

Oops...

[rapid geode]

what did you do to the penguin!

[violet parcel]

what do you uses as a backscratcher ?

[blissful roost]

My hand, like a normal person... 🤨

[rapid geode]

so ytoutube search officially now does not return any results of the thing you searched for. sigh.

[blissful roost]

Pretty sure it does.

[rapid geode]

nope. as of today something changed and it is almost entirely unrelated content.

useless

ha

[blissful roost]

Seems absolutely fine to me.

Search for Kubernetes tutorial.... I get.. Kubernetes tutorials.

[rapid geode]

i searched for winning lottery numbers... got nothing

[blissful roost]

😐

[versed meteor]

https://youtube.com/watch?v=cIZShVgNeWo&feature=share

Will this tutorial work?

[raw jasper]

the trick is, you need to be logged out of google

[raw jasper]

I have a thinkpad x220, but mine's not a tablet

Do you make use of the tablet feature?

[blissful roost]

I have, but it's really a bit pointless for me.

It's not something I'd ever make use of enough to justify it's existence. Lol

It just happened to be cheaper at the time.

[raw jasper]

The time = when it was new, or did you buy refurb?

[blissful roost]

Refurb, eBay.

[raw jasper]

That's my source of thinkpads too :P

Great little machines, love them

[blissful roost]

£95 in total, plus £20(?) for the docking station.

[raw jasper]

£95 is similar to what I paid for mine

[blissful roost]

👍

[raw jasper]

Though after the RAM and SSD upgrade, the price kinda went up :P

Speaking of, I'm having trouble sourcing DDR3 DIMMs

[blissful roost]

I salvaged 8GB RAM from my dad's old laptop.. but I paid £25 for a 120GB mSATA SSD.

Stuffed a spare 1TB HDD in there.. and another 120GB SSD in the docking station.

[raw jasper]

I found a cheapo 512GB SSD for EUR20

("Patriot" brand)

[south light]

It's just using a zener diode and a resistor, the idea does work, but it's not great. Zeners make better over voltage protection and voltage references than they do regulators for an actual load

Kinda just depends on what you want to power with it

[versed meteor]

ok

I evaded using this with a premade power supply

[glad ruin]

... and unless they are 5.4V Zeners they don't even make particularly good references.

[versed meteor]

alright I am finally done wiring up this project

that was tiring

Version 1 done

what do you guys think?

[patent hemlock]

well done - i think you are on your way to world domination

i especially like the desk/table clamp (i used a counter-weight)

my first one just waved at me (or hit a cat on it's nose if it got too close) 😀

[versed meteor]

oh you made something similar??

[raw jasper]

Is that.... eye drops? :P

[patent hemlock]

yep

[raw jasper]

An eye drop conveyance robot!

[patent hemlock]

it's on a schedule and reacts to a certain HomeAssistant action

a rube goldberg thing to ensure i take my meds 😈

[raw jasper]

hah, that's genius

[patent hemlock]

i'm pairing it up with a "carosel" of things so that it'll deliver more than one thing (not at a time)

[raw jasper]

hears random mechanical noise coming from the Robot Room -> hmm... must be the blood pressure meds again

[patent hemlock]

it even "goes to sleep" and "wakes up" (photo sensor)

[versed meteor]

thats awesome!

[patent hemlock]

i think i'm going to eventualy pair it up with OpenCV, but i'll need more servos

https://giphy.com/gifs/mike-korea-north-xl5QdxfNonh3q

[versed meteor]

why not a lego motor?

[patent hemlock]

regular servos are cheaper

[versed meteor]

then you don't have to 3d print more plates and stuff

ok

[patent hemlock]

no plates (so far)

[raw jasper]

you know what'd be funny? If you had it impatiently shake the pills around if you didn't come to "answer" it

[versed meteor]

or make a loud annoying beep sound

[patent hemlock]

did you look at my notebook?

[versed meteor]

coding this is gonna be so hard

[patent hemlock]

build small pieces that each do one thing then put all the things together (modular programming)

[raw jasper]

This way, you even get to reuse said small pieces in later projects

[versed meteor]

ok ill try that

[blissful roost]

This is the way.

[tardy badger]

Slow cooking beef for crispy shredded beef tacos

It smells amazing

[raw jasper]

I am moving the data from my sandisk ssd elsewhere, because TIL it's one of the affected mystery wipe models

I'd rather be slow cooking beef

Thankfully, p7zip is good

[tardy badger]

Hehe

I’ve never made crispy beef tacos before but I’ve seen about a million videos about it

[raw jasper]

Sounds fun

[tardy badger]

I’ve made about a dozen other Mexican dishes, it’s fun to branch out

[raw jasper]

I also have this
https://www.amazon.com/Modern-Processor-Design-Fundamentals-Superscalar/dp/1478607831

[tardy badger]

Ohhh

[raw jasper]

....and macOS is being macOS again. I didn't exclude some of its "special" hidden directories from the backup procedure, and it caused a "Permission Denied" error, even though I have full disk access turned on for my terminal emulator, killing my tar

I did an ls -lRa | grep denied to find all such directories, and excluded them

[late fulcrum]

You may need to use xattr to find files/directories with extended attributes that are causing permission denials.

[tardy badger]

Someone pinged me… and then their message was deleted?

[raw jasper]

thanks for the pointer. This time, simple recursive ls was sufficient, as I just wanted to find the paths and exclude them

[tardy badger]

Cooking down nicely

[tardy badger]

This has turned out tastier than I could have imagined

[rapid geode]

mmm

so ive been looking at all manner of keycaps on etsy and google and these are the first ones i actually want...

[raw jasper]

Nice! Enjoy!

[ebon dew]

Those look delicious. Are they squishy like the candy?

[raw jasper]

I was about to say they look like frosted candies!

[ebon dew]

Actually nvm they would be a nightmare to clean.

[rapid geode]

the ad says "do not eat these, they do not taste good, what is wrogn with you?"

i guess they are just hard resin, but they look so real

[rapid geode]

imagine after eating a bag of cheetos

[raw jasper]

Why would you eat a bag of cheetos in front of your computer? Do you want ants?

[rapid geode]

...

[tardy badger]

They were so good and I may have ate too much

[cinder spear]

imagine the orange keyboard

[raw jasper]

Hah, that's great

[rapid geode]

orange flavoured?

[cinder spear]

cheeeetos

[rapid geode]

haha

[tardy badger]

Harvest from the garden

[rapid geode]

yum. i ate one of my peaches today. mmm.

[dusty citrus]

Ehm, someone knows any difital signage software or the kind fully free?

[raw jasper]

I approve of the olive oil in the background :P

[versed meteor]

How’s the pseudo code looking?

@patent hemlock

[dire dirge]

You write down your code‽

[blissful roost]

Who doesn't?!?

Personally, I prefer engraving mine on stone tablets... that way it feels like it has real authority.

[late fulcrum]

I like to store mine as magnetic field variations in a layer of metal oxide

[tardy badger]

I just think about my code and then let it drift into the ether till I slowly forget what I was doing

[blissful roost]

Truly open source...

[dire dirge]

You guys code?

[tardy badger]

I did write pseudo code in university

[fossil dawn]

just ask chatgpt for everything. I heard it's very good and accurate and never makes any mistakes.

[dire dirge]

I do it in my head

[blissful roost]

I don't code, actually.. unless you count using other people's work and adjusting it.

[dire dirge]

Personally, I go into help channels and asks others to code for me

[versed meteor]

Sometimes

At least there is no compiler error to worry about

[versed meteor]

did you forget what server you were in?

[blissful roost]

No.

[versed meteor]

ok

[blissful roost]

I have a Master's degree in Ironic Sarcasm.

.. and a Doctorate in Pedantistry.

[late fulcrum]

Well, I do code, but originally I stored my code as holes in card stock

[ebon dew]

the original floppy disk

[urban arrow]

There's an old saw: There's only been one computer program ever written. All the others are copies of it.

[blissful roost]

lel

[urban arrow]

Sarcasm - just ONE of my many talents.

[blissful roost]

Shame the inventor of Copy&Paste died..

Shame the inventor of Copy&Paste died..

[raw jasper]

Sometimes writing a spec before you go all out writing code is useful, and/or necessary

[dire dirge]

Are you joking or not, because I can't tell

[raw jasper]

https://en.wikipedia.org/wiki/Punched_card

[dire dirge]

No I know, I just wondering if he still does that

[raw jasper]

the sentence specifies "originally"

[dire dirge]

Yeah, before he writes it down

Like is he joking or does he actually first code on punch Cards

[finite horizon]

hey anyone know if the micro USB port on a RPi 3A+ could be used as a USB port or if its just for power?

[rapid geode]

as in, he is old enough to have used punch cards....

one of my cnc machines had paper tape readers. it was a "thing" well into the late 80s.

[glacial wigeon]

power only, the usb data lanes are routed to the usb-a port

[raw jasper]

Apparently, they're still used at least in one automated sewing machine:
https://www.youtube.com/watch?v=zWJZFQHklBg

[finite horizon]

would a regular ol unpowered hub be able to split that 1 port into 2?

[glacial wigeon]

yep

[finite horizon]

sick, time to dig that out

wouldve gotten the pi4 2gb but its been OOS and will be for months

[glacial wigeon]

the 3b just has a 4 port usb hub mounted on the board

[finite horizon]

ah

[glacial wigeon]

(that hub also has a built-in ethernet controller, on a hidden 5th port)

[finite horizon]

well makes my life easier now, the only ones in stock around me are the pi B+ and pi4 4/8gb models for more than id like to pay

[dusty citrus]

This remembers me, or rather bothers me on why this didn't succeed on getting hyped as with 3d printing
https://github.com/g3rard/OpenKnit

[raw jasper]

I guess most people who knit as a hobby prefer to do it manually because they find it fun?

You can't 3D print by hand, though

[glacial wigeon]

yes you can

https://www.youtube.com/watch?v=F--jbmymowI

[dusty citrus]

But you can make more or less the same things with other production methods
Although you sorta can

[glacial wigeon]

random example from YT

[raw jasper]

Well, that doesn't really count, does it?

You can't make an usable object with that thing as far as I know

[glacial wigeon]

not to the same level of accurate as a 3d printing machine, but the same can be said about knitting

[rapid geode]

of course you can

[glacial wigeon]

yeah, from what ive seen, 3d pens are more for art then function

[rapid geode]

or welding/repairing

[finite horizon]

i used a 3D pen for welding PLA but yea u can make some functional things with it

[rapid geode]

define functional as well. 99% of people use their printers to fill recycling bins 😛

[finite horizon]

hey leave my recycling bin alone

[ebon dew]

I have seen some pretty amazing things done with 3D pens. They're also good for gap filling issues in 3D prints. It's basically filament + soldering iron which is a technique that's been used in plastic welding for decades.

You can in theory make a part much more structurally durable by melting a metal mesh into the plastic. Kind of like adding rebar to a concrete pour.

It's a technique that's especially prevalent in autobody repair. https://www.youtube.com/shorts/Di81W1K3NCw

This concept has transferred over into the 3D printing world with mesh fabric inlays.

You can use that same technique to repair a broken 3D part.

[raw jasper]

That's cool, and I didn't know any of it. Thanks for the info!

[finite horizon]

im gonna try this with some woven wire mesh and actual 3d printer when i get my new one next week

[late fulcrum]

Not any more, that was years ago

[gentle pier]

Where would I go for neopixel led help?

[urban arrow]

https://learn.adafruit.com/adafruit-neopixel-uberguide/python-circuitpython#setting-up

[patent hemlock]

you can also ask in #help-with-projects

[gentle pier]

Yeah I was asking for what the correct channel is

So I guess that would be it

[dire dirge]

I have the weird urge to make a microcontroller Dev board lol (it's 2 right now kek)

[rapid geode]

make one that is 4ghz 64 core with 512gb ram.

[tranquil swallow]

This is sad but true

If a 3d printer isn't gathering dust it's likely printing useless trinketd

[raw jasper]

I've got some spare time, so I'm looking into reworking my backups system

So I'd like to pick y'all's brains

[glad ruin]

https://tenor.com/view/doc-and-marty-gif-21977925

[raw jasper]

I'd like a solution where client machines can only write to the backup, not modify it (to hopefully guard against dumb ransomware or viruses). Does such a solution (that does not involve me buying an LTO drive, which I can definitely not afford) exist?

[dire dirge]

It's called user sanitation

[stoic swift]

What size of machine screw would I use to mount a Feather? M1 or M2?

[rapid geode]

m2.5 i think

yes

[versed meteor]

just finished coding my rpi to display the camera feed to a flask server

but its REALLY REALLY SLOW

how do i fix it?

[rapid geode]

get a ryzen?

sorry, haha. i dont know about pi/camera stuff 😦

[glacial wigeon]

i would start with profiling, to figure out where all of the cpu usage is going

[raw jasper]

I feel this one's probably I/O-bound

[honest jolt]

Make sure you are using video mode

[versed meteor]

how do I do that?

btw I am using a webcam

[patent hemlock]

can't remember if you're using a Pi 3 or not, but that will be pretty slow with hi-def video due to 1) processing power on the Pi and 2) network bandwidth

try adjusting the video quality down to something like 640x480?

[versed meteor]

how do I do that?

lol

[versed meteor]

pi 4

[patent hemlock]

i dunno how you'd adjust the video stream - i have no idea what software you're using, so i'd look at those docs

also, because your application is "sweeping" the camera, that app will be eating up a lot of cpu due to the tight looping required

[versed meteor]

is there anything smaller than 680x480?

[half plank]

Does anyone know to to replace the micro usb on and esp with a USBC

[patent hemlock]

oh yes - 320x240 is really small (these days)

[versed meteor]

I changed the setup

I am now running it on my pc

[rapid geode]

im waiting for the new 16k monitors

[versed meteor]

the mounting brackets I made come in handy

[gritty galleon]

I'm still waiting for the 8K content

16K would look very nice though

[rapid geode]

ive done a few shows shot in 8k, but they dont get delivered in the end at 8k.