general-chat

[rapid geode]

im pleased that greenish peaches that fall off the tree will ripen in a bad in a week or so

[raw jasper]

I wonder what overripe cucumbers taste like...

[rapid geode]

bitter apparently

[tardy badger]

Yeah, there’s a chemical compound named after cucumber that gives it a bitter taste

cucurbitacin

[raw jasper]

I guess it makes evolutionary sense; If the cucumber's seeds cannot survive the digestive tract, it would make sense for there to be selective pressure for the development of a substance that would discourage eating

[tardy badger]

Stressed cucumbers also produce a lot

[ebon dew]

This is fine 🔥

[raw jasper]

The plant stress pathway is interesting

And yeah, part of it all is the production of defensive substances, including those that would make it bitter

and/or (more) poisonous

[rapid geode]

it is punishment for all the florida man stories.

actually looks like cuba is going to have a very bad time :/

[tardy badger]

California is having a bad time

[rapid geode]

eep

oh thats the hilary one in the news

[tardy badger]

Ojai, CA has basically been rumbling since a 5.1 quake hit as Hilary was coming in

With 2.5 magnitude tremors pretty consistently

[raw jasper]

Giving human names to storms has always weirded me out

[rapid geode]

i told them not to put a city there.. but do they listen?

[tardy badger]

I’m wondering if Hilary is causing tremors by the wind hitting so many tall buildings

[glad ruin]

I don't think the physics would work there.

[rapid geode]

it gets weirder caUSE female named storms have more damage because people take them elss seriously

[glad ruin]

California is just on a massive fault line.

[rapid geode]

yeah just coincidence to be at the same time

[raw jasper]

Earthquakes are just as, if not more destructive, and we aren't naming them (which makes sense)

[rapid geode]

wind is in relative terms insignificant to tectonic motion

[glad ruin]

The upside is that a lot of buildings on the west coast are built to withstand earthquakes without too much damage.

[glad ruin]

Earthquakes can't be predicted far enough ahead to come up with a name.

[raw jasper]

I mean, noting would prevent them from naming them after the fact

(nothing in my comment implied that we can predict earthquakes, although that would be a nice thing to have if we ever figure it out)

[glad ruin]

"Without too much damage" meaning that the building will probably not have to be torn down, but it will of course still need significant repairs.

[rapid geode]

you also can have many earthquakes within hours or minutes.

strom names are given well in advance

on as rotating schedule (male/female)

[glad ruin]

Yeah, well that's what happens when you've got two massive rocks "sliding" together. They .

[tardy badger]

All earthquakes are named Kyle so it makes no sense to announce that on the news

[rapid geode]

ha

[raw jasper]

Using the vibrating frog to describe tectonic collision dynamics probably marked a new high in discord emoji discourse

[glad ruin]

That's not a frog

[raw jasper]

looks like some sort of cartoon toad to me

[glad ruin]

Cat

[rapid geode]

cat?

[raw jasper]

nvm, it's got the :3

[raw jasper]

It's got Big Zoomies

fun fact: The Japanese word for "frog" is a homophone to the word "to return home"

[rapid geode]

apparently i cant spell

hahaha

[tardy badger]

I saw someone making fun of Alex Jones in a Reddit feed about hermaphroditic squash flowers, and basically changed “frogs” to zucchini in his favorite rate about putting chemicals in the water

[olive dome]

tropical cyclone naming is for warning the public, so you can make public easier to discuss/understand.

Fun fact: sometimes the naming can be reused, if it wasn't causing much damage

[tardy badger]

If they do enough damage, they get the old sports hall of fame treatment

[rapid geode]

ha

[raw jasper]

There truly is a subreddit for everything

[rapid geode]

reddit is a scary place

[tardy badger]

I stick to the tame parts of Reddit

I don’t have a formal account

[raw jasper]

I like peeking into /r/FPGA

[rapid geode]

like the LTT subredit this week?

runs

[raw jasper]

Don't have an account either

[tardy badger]

Just casually browsing

[raw jasper]

Yeah, let's not discuss LTT

[raw jasper]

I don't have a reddit account either. I also didn't have a twitter account when it was a thing

[tardy badger]

I have a Xitter? account still

[rapid geode]

i dont go on reddit much. i have been looking there the last wek or so on the mech keyboards sub to see whats going on

i deleted elontube

and facespace

[tardy badger]

I realize that if you go by the Xi pronunciation from Chinese that Xitter probably sounds bad lol

But honestly it’s apt for what it is now

[rapid geode]

ha

[raw jasper]

facespace xD

[rapid geode]

i like that he removed peopels ability to block.

[raw jasper]

Apparently he couldn't do that

[tardy badger]

Posts are Xeets, and reposts are ReXeets

[rapid geode]

cause that was the problem. being able to block all the horrible people

[raw jasper]

Because that'd get X delisted from the playstore/apple appstore

[tardy badger]

I blocked the twitter surveys profile just 30 minutes ago

[rapid geode]

at this point i feel he is deliberately killing it for some reason.

[tardy badger]

Seems likely

Who wouldn’t want a 46b write off

[rapid geode]

only about 12b left im told. hahga.

its gone down a lot

[tardy badger]

Lol

[rapid geode]

but, why. so weird.

anyhow

back to happy thoughts, like, uh..

hmm

nope, i got nothing

230 keycap stems done

[raw jasper]

You can make the wood keyboard of your dreams

[rapid geode]

ha

should end up with 450-470 i think (all the material i have)

i have wood for 564 laid out

[raw jasper]

That'd be enough for, like, 3.5 keyboards?

(No, I did not do the math)

[rapid geode]

i also have 80 brass and 80 aluminium stem blanks, but im not doing those yet

60% keyboard needs 71 stems

[raw jasper]

So, when are you gonna post a listing to your little shoppe of horrors? >:P

[rapid geode]

but im not doing full sets

in a week or so i hope.

we'll see

[raw jasper]

Do they smell of wood?

[raw jasper]

Hopefully you get lots of sales! :)

[rapid geode]

the cedar ones smell amazing

but they will get infused with resin so probably wont smell when finished

that will be a very expensive one too. the wood is 1400 years old. if i do a full alpha numeric set, with ebony for the other keys, and a cedar case, it will be well over $2000 i think. i have no idea if anyone in their right mind would buy that.

luckily keyboard people arent in their right mind

[late fulcrum]

What kind of cedar? Red cedar? Incense cedar? Something else?

[rapid geode]

western redcedar from haida gwaii

off cut form a totem pole haha

i had lots but the only bit left is enough for 2 alpha numeric sets and 2 cases.

[tardy badger]

There’s a type of Fir tree that wreaks of cat urine. It’s a White Fir, though due to the constraints of language of this server I can share the name it’s commonly referred to as.

[rapid geode]

furpy?

:x

[late fulcrum]

I would think it's bad luck to cut wood from a totem pole

[rapid geode]

new totem pole being made at the time by my neighbour. 5 ft diam tree. i grabbed a little wedge of scrap

mostly it was cracked and unusable

[late fulcrum]

Ah, that's fine, in fact it's re-use of scrap, which is to the good

[rapid geode]

he used a lot fo the scrap for bbqing salmon haha

he then took a mold of it (all 36 ft) and cast it in stainless steel

there used to be photos online but i dont see any. the customer died, so maybe its all blocked for some reason?

cost like $2m to cast. insane. haha

" smaller" bear they cast too

there it is

haha

now imagine a bunch of little keycaps at the bottom

[ebon dew]

umm sir are you aware there's a stork on top of your head? i feel like there's a story behind that one.

[rapid geode]

its called the hat, soo

im gonna stop at 400. ill do the rest in the morning. too noisy now

theres not much left. 50-60 or so

i am getting about 100 per $5 peice of delrin. so, 5 cents each. plus about $2 in machine/labour time.

could be worse

haha

[ebon dew]

That's pretty awesome. Seriously. Congratulations. I wish my 3D printer would spit parts out that fast.

[rapid geode]

well the printed nylon oens were about 15 cents. but they were too flexy and deformed after a few inserts

the glue is fairly expensive for this. id probably put "assembly" as $1 for time and cost of the 3m primer and glue. the wood is $50 cents for the basic ones. up to $4 for the fancy ones.

the milling of each cap is about $10. then engravinging, which is variable. $6-$12. depends on complexity, wood type and amount of colours

soo, 20 for the basic key, and then packing and fees. add up haha. ill be more money than the chinese wood ones for $25cdn, but they will be MUCh nicer

ill still be less than the cast resin artisan caps too. those are 40-70usd which is crazy

especially for a what is often a 45 cent resin 3d print and a fairly basic pain job (

some are clearly a lot more finish work

i may try a few of those one day using my delrin stems

[fierce prawn]

Just finished adding github style heatmap to my notes

this one shown is to show what date have notes

[fierce prawn]

@late fulcrum You know discord have the pronounce things right?

[late fulcrum]

I do not understand your question

[raw jasper]

I think they meant s/pronounce/pronouns; Discord recently added a "profile pronouns" feature. Which... IMO, kinda defeats the point, because you have to click to see the person's profile to actually see the pronouns

[late fulcrum]

Ah, I didn't know about that feature. I was wondering if it were an emoji pun feature (which would be fun but bewildering) or some text to speech feature (which seems to me like it would have limited usefulness).

[raw jasper]

FWIW, Discord does have TTS

[late fulcrum]

I didn't know about that either! I'm a pretty basic Discord user, and treat it pretty much like IRC

[raw jasper]

I have no idea how it's supposed to work or what the option does, but it's there

(Found it when turning on "reduced motion" to be able to have animated GIFs only play on hover)

[late fulcrum]

It's weird, some things I'll dive in and tweak/configure/customize every little detail, and others I'll just use however it comes out of the box.

[raw jasper]

Thing is, some animated GIFs and stickers can be really obnoxious, to a motion sickness-inducing amount, and discord plays them over and over. I'd rather have some agency over that.

IRC never had this issue because it did not render images

:P

[tranquil swallow]

discord killing every irc chat I used was tragic

[raw jasper]

To be honest, discord is objectively worse in almost every respect beside providing scrollback without having to visit a log website

[glacial wigeon]

i just never close my irc client

boom, i am my own log website

[raw jasper]

ah yes, the bouncer solution

[glacial wigeon]

i have 6.7gig of irc logs

[raw jasper]

I remember people either did that or used VPSes

[glacial wigeon]

going back to at least 2015

[late fulcrum]

I may look at that hover option, as I dislike anything triggering my motion sensitive vision (those GIF ads are one of the original reasons I joined the adblockers)

[glacial wigeon]

clever@c2d /media/videos/4tb/dcc $ du -h ~/irclogs/ | sort -hr
6.7G    /home/clever/irclogs/
2.9G    /home/clever/irclogs/freenode
2.2G    /home/clever/irclogs/rizon
560M    /home/clever/irclogs/libera
412M    /home/clever/irclogs/oftc
160M    /home/clever/irclogs/esper
94M     /home/clever/irclogs/mozilla
...

[late fulcrum]

I do remember the IRC client had low memory and CPU usage. Electron apps (such as Discord) do not.

[glacial wigeon]

my native discord window is using at least 100mb of ram

irssi is using 19mb

[raw jasper]

FYI

I do not have the discord "app" installed on my computer. I just use the website. One browser engine being loaded is more than enough

[late fulcrum]

I abuse my browsers hard enough that having the app in a separate process is useful to me (as long as my ancient computer can keep up, which is usually)

[raw jasper]

Also, there is an OS-wide option similar to this, which also disables or reduces the intensity of OS animations. Discord tends to respect that, but firefox itself does not, and will happily play animated GIFs on websites instantiating them with an image tag, without any additional logic to account for it

[raw jasper]

My browser shenanigans have been reduced to having noscript + ublock origin installed.

[late fulcrum]

I vaguely remember Firefox had its own setting for that, but it was one of those obscure ones you had to access via by name in a developer menu, like render.process.animate.git.runloop or somesuch. And that may no longer be true.

[raw jasper]

There used to be a setting, but its name has probably been changed, and I don't encounter animated GIFs in non-SoMe contexts often enough for it to be worth chasing

[late fulcrum]

I used to have a bunch of silly extensions installed, but they kept having issues, so I ditched most of 'em.

[raw jasper]

FWIW, These are mine

[late fulcrum]

That looks reasonable. Didn't know about Tree Style Tab, that could be useful to me.

[raw jasper]

tree style tab is neat if you have the habit of spawning hundreds of tabs

[late fulcrum]

I have that habit

[raw jasper]

Then give it a try! :D

[glacial wigeon]

what if you have a habbit of spawning more?

enough that just closing one tab makes chrome hang...... lol

[glacial wigeon]

let me get my count

oh, its that fun bug again

this will take an hour

[fierce prawn]

i just open and close as needed
why you all never close tabs

[glacial wigeon]

if you look REALLY closely, youll see the are you sure you want to close this tab popup

when chrome is animating that popup, it stupidly iterates over the tab list

with as many tabs as i have, that pegs the cpu, and slows the animation down

[late fulcrum]

We close 'em all the time. We also open 'em all the time. I was the kid the librarian would get happily annoyed at because I had two dozen card catalog drawers open at once.

[glacial wigeon]

bugs like this, are why i run the native discord client

[raw jasper]

I've never had this issue with firefox

[static flare]

cause I might need them

[fierce prawn]

just bookmark them

[late fulcrum]

Just found a site where it would implement a scroll bug if I refused to accept cookies. Closed that tab.

[glacial wigeon]

50% of my cpu is just going into aura::WindowTracker::Add()

[static flare]

Oh, I have hundreds of bookmarks

[glacial wigeon]

20% info __memmove_avx_unaligned_erms()

[raw jasper]

I found out yesterday that websites can send a beacon when you close the tab, thereby tracking season session time

That's... creepy

[blissful roost]

Ohh, there's all sorts of beacons.

Especially relating to video content.

[late fulcrum]

Bookmarks can be annoying when links rot.

[glacial wigeon]

chrome is now begging for attention, yet refusing to take any input, lol

[raw jasper]

I wish there was an extension that auto-archived everything I visited and made it full-text searchable

[late fulcrum]

My loathing for ECMAscript has never diminished

[glacial wigeon]

session buddy sorta does that

vimium has a search you can more quickly access

just hit T in any tab, and you can search the titles of all tabs

[raw jasper]

1. It's chrome-only.
2. 🙅

[glacial wigeon]

vimium adds a number of hotkeys to chrome

[raw jasper]

I am not reading a ToS for a browser extension runs

[glacial wigeon]

x to close the current tab
T to search all tabs
t to open a new tab
there is one to click links via the keyboard

[fierce prawn]

i am not using any extension
but my trusty note app obsidian

[glacial wigeon]

ok, i got gmail to close, now i can count my tabs

brace yourself

[fierce prawn]

ERMMMMM
WTTTTF

[fossil dawn]

there are even add-ons for that add-on. For example a search bar that quickly searches the tabs by name and a way to save tabs in their tree-shape as bookmark and reopen them back to their tree shape

[blissful roost]

I have 5 tabs, across 2 browsers. 😛

[raw jasper]

So... um... Do you have, like, 128GB of RAM or something?

[glacial wigeon]

64gig, but i ran it like this on 8, lol

but not all tabs are using ram

[raw jasper]

OTOH, chrome suspends tabs

[glacial wigeon]

only on startup

[raw jasper]

Firefox does not

[fierce prawn]

yes

and it sucks

Sometimes it supends code.dev tabs while I got search for result on stackoverflow

[late fulcrum]

I don't even know what "suspends tabs" means in this context.

[glacial wigeon]

ive never had that happen

[raw jasper]

It unloads the tab for memory and reloads the tab from the web when clicking it again

[fierce prawn]

i had while reading a long anwser

[raw jasper]

You might have disabled it; I think there's a setting for it?

[late fulcrum]

That's bizarre. I can kinda understand why it would swap things out, but weird.

[raw jasper]

IDK, I only have Chrome installed for those grumpy websites that refuse to work with firefox

[glacial wigeon]

it must be some option i dont have enabled

[raw jasper]

AFAIK it's by default
https://arstechnica.com/gadgets/2023/02/chrome-110-will-automatically-discard-background-tabs-heres-how-to-stop-it/

[fierce prawn]

it actually restart the github web vscode and let it connect all again
then i forgot the anwser and go to stackoverflow then the loop happens again

so i hate that

[late fulcrum]

One of many reasons I avoid web based development environments

[glacial wigeon]

now youve done it, lol

[fierce prawn]

well i don't want to clone a whole repo down just for a quick docs pull request

[glacial wigeon]

i opened chrome://discards to see what it did
Trace/breakpoint trap (core dumped)

the master process died, and all windows closed 😛

[raw jasper]

wow

[glacial wigeon]

(gdb) bt
#0  0x0000560eb0203cf6 in partition_alloc::internal::OnNoMemoryInternal(unsigned long) ()
#1  0x0000560eb0203d09 in partition_alloc::TerminateBecauseOutOfMemory(unsigned long) ()
#2  0x0000560eb0203d19 in partition_alloc::internal::OnNoMemory(unsigned long) ()
#3  0x0000560eb0203e20 in partition_alloc::internal::SetSystemPagesAccessInternal(unsigned long, unsigned long, partition_alloc::PageAccessibilityConfiguration) ()

[fierce prawn]

you can disable per origin

[fierce prawn]

but it will enable back auto

[glacial wigeon]

for my chrome, the only time tabs suspend, is when restoring them after an exit/crash

only the tabs that have focus load into memory

but thats still one tab for each of 60 windows

and youtube vids auto-play on focus

[fierce prawn]

Whats the diffrence

[glacial wigeon]

oh, and another super anoying thing

i told me window manager, no focus theft

chrome steals focus while starting 😛

its impossible to type in any window, until chrome has re-opened all 60 windows

[fierce prawn]

wow

just open chrome
minimize it

then open it when its finished

[glacial wigeon]

you cant

every time it spawns a new window, that window takes focus, and isnt minimized

and it doesnt paint either, so you can barely see that your typing into chrome

[fierce prawn]

I can do it with keyboard shortcut

Win + M

[glacial wigeon]

that typed a m

[fierce prawn]

Oh your on linux
I missed your Window Manager line

[glacial wigeon]

chrome fully resumed, i'm now baraged by youtube videos

[fierce prawn]

hmm
i once restart chrome on a window of 100+ yt videos and it doesn't lag

[glacial wigeon]

~16 youtube videos playing at once

[fierce prawn]

shoot
no wonder why

[glacial wigeon]

the youtube videos arent the problem

[fierce prawn]

what is the problem

[glacial wigeon]

its that chrome stores the tabs in a std::vector i think

adding/inserting/removing elements, requires memcpy() every element

and with 12k tabs...

[fierce prawn]

oh yeah copying memory every 12k tabs
Hammers your ram hard

i think you should consider closing tabs every shutdown

@glacial wigeon

[blissful roost]

Or just working more efficiently...

[glacial wigeon]

^

[fierce prawn]

bookmark them with timestamps

[glacial wigeon]

bookmarks are where tabs go to die 😛

also, ive tried, it would take a week to bookmark and close every tab

[fierce prawn]

just close them every time after use

[glacial wigeon]

have you seen my house? lol

its as big of a mess as my chrome profile!

i tried chrome://discards in a second profile with fewer tabs

it just doesnt load

that second profile only has 2428 tabs

[fierce prawn]

Login back your google account and use the journeys in the history tabs
it record what tab i recently browse and after all that

[glacial wigeon]

that second chrome profile logs me out every hour

[fierce prawn]

what? How?

[blissful roost]

That's not very... clever.... 😛

...sorry

[glacial wigeon]

the whole google sync mess

[fierce prawn]

mine always work

[glacial wigeon]

are you using chromium or chrome?

[fierce prawn]

chrome

[glacial wigeon]

thats why

google got upset that people are forking chrome, and leeching off google's sync database

so they banned all non-official builds

[fierce prawn]

oh

[glacial wigeon]

you must create api keys in the google console, and set env vars, to let a non-official build in

and for some reason, a g-suites account doesnt work 100%

[fierce prawn]

does your personal account work though

[glacial wigeon]

also, if you spawn chrome without setting those env vars, it deletes your google acct from the browser, and you have to login again

yes

[fierce prawn]

so your personal acc google sync work on chromium
but not the g-suites account?

[glacial wigeon]

the g-suites one will only stay logged in for a few minutes

it can sync during that time

but then it gets booted out

and i have to re-enter the pw constantly

[fierce prawn]

but the personal one?

[glacial wigeon]

the personal one stays logged in for months

and only boots me if i spawn chrome without those magic env vars with api keys

[fierce prawn]

so you always launch with thoose?

[glacial wigeon]

yes

but the personal api keys, lack access to the g-suite account

so i have to launch each chrome profile with the right env vars

[fierce prawn]

you can prebuilt that in

[glacial wigeon]

i could, but that doesnt solve the issue that my personal and g-suite acct need different keys

so i would have to build chrome twice, and use the right build for each

and if you use the wrong keys, chrome deletes every trace of the google acct

and i think due to security settings on the g-suite acct, that includes all tabs/bookmarks

it gives a popup telling you why

then it closes that window, so you cant read it 😛

need a screen recorder to even catch it

[fierce prawn]

is chrome canary chromium
no right?

[glacial wigeon]

?

[fierce prawn]

Is chrome canary the same as chromium

[glacial wigeon]

dont know

[fierce prawn]

apprantly its the same except it comes with the api key from google

sad life

[stoic swift]

Any recommendations for a desktop power supply I can use for little micro controller projects?

[glad ruin]

That's a pretty broad question. What will you be connecting to the microcontroller?

[raw jasper]

Weird thing that happened to me: Had an old thinkpad that consistently rebooted after 2 days of uptime. Forced Intel ME unconfiguration. Hasn't rebooted since

Intel ME was never configured (at least not by me, but it was an used device; I remember unconfiguring it, but I did update its firmware recently), but, I guess that somehow helped? 👻

[thick wind]

Do your microcontroller projects have any particular power requirements? Are you looking for something more like a bench top power supply or a wall wart?

[glad ruin]

ME is cursed. Take it from someone who has worked at Intel on firmware.

[stoic swift]

Umm I was thinking bench top, controlling leds and stepper motors, small kinds of projects

I google'd Amazon and course there are tons, just want to find a trusted brand that had good quality and not a cheap knockoff

[glad ruin]

So, you'll want something that can do 12V. Preferably 24.

[raw jasper]

The only reason why I decided to try, nay, why I even thought of unconfiguring ME was because I've read reports of systems with neutered MEs rebooting

[glad ruin]

In that case I recommend getting a used HP/Agilent/Keysight supply. Rigol is another decent option, though as a general rule I don't recommend getting test equipment on Amazon.

I said used, which is far cheaper. I guess I should ask what price range you are looking for though.

[stoic swift]

What about this : https://www.amazon.com/Variable-Quick-Charge-Adjustable-Switching-Adjustment/dp/B0C1SHSPPJ/ref=sr_1_18

[raw jasper]

Sorry, I missed the word :)

[glad ruin]

I'd be dubious. Their 30V 10A power rating is very high for what that thing is. Also it's single channel. Dual would be preferable.

Looks like their readout is inaccurate as well.

[raw jasper]

It looks nice though, in an "aftermarket car stereo" kind of way :>

[fossil dawn]

baby steps I can kinda reproduce my issue with half the amount of code

[glad ruin]

@stoic swift do you actually need a variable supply? Another option might be to just get a hefty 12 or 24V MeanWell or one of the ATX supply mod kits.

[stoic swift]

I don't need variable I think, I just want to power the board and any supporting components.

I've been using a battery holder that holds 3xAAA 😄

I do happen to have one of these as well that I've never really used : BBCIII BREADBOARD POWER SUPPLY KIT: https://breadboardcompanion.com/products

Showing my age with that no doubt 🙂

Ahh so something like this then : https://www.youtube.com/watch?v=n_A-jkpjpcM&ab_channel=DroneBotWorkshop

[glad ruin]

Yeah honestly I'd recommend an ATX supply.
https://hackaday.com/2022/08/18/a-particularly-polished-atx-bench-power-supply/

[stoic swift]

Whoa! That looks gorgeous! 😄

[glad ruin]

https://hackaday.com/2022/04/27/diy-bench-psu-looks-like-a-million-bucks-but-is-easy-on-the-budget/

[stoic swift]

I have a new Bambu X1C so this looks like a great path.

[glad ruin]

https://hackaday.com/2010/12/09/atx-psu-turned-into-an-adjustable-voltage-bench-supply/

[fossil dawn]

I really want to do something like that too. But I've heard that there are issues with (electrical) noise or something 🤔

I've also thought if you could add a USB car charger (random example link https://www.amazon.com/SONRU-Charger-Adapter-Ambient-iPhone/dp/B0BBM76HRW ) to get a lot of USB charging power. They're just 12V to USB, right?

[thick wind]

I once thought of possibly using a usb pd device as a variable power supply. Combine a pine power with https://hackaday.com/2021/01/16/usb-c-programmable-power-supply-for-any-project/ and add some buttons and encoders to control the output negotiated from the usb c supply.

Then I looked at the atx supply and decided it wasn’t worth the cost and time…for now.

[raw jasper]

ha. This reads almost like a light novel title: "That time I made a DIY Bench PSU that looks like a million bucks but is easy on the budget"

[fossil dawn]

are you actually using an ATX PSU as regular desktop PSU?

[thick wind]

No not yet. I set aside an old atx for that purpose, but never got around to building it.

Turns out having access to actual bench top PSUs at work really reduces the motivation to make my own…

[fossil dawn]

heh 😄 the endless list of projects...

Same with me actually. I have an old ATX PSU and I soldered on an XT60 and used it a bit with a LiPo charger but I never got around to building it into a nice box and add some more features like the links above. And for LiPo charging I switched to an old laptop PSU because turns out I only need 60W and it's way more convenient than the big ATX with its bunch of wires without a box

[stoic swift]

This might work too : https://www.adafruit.com/product/4880

Or https://learn.adafruit.com/adjustable-breadboard-power-supply-kit

[raw jasper]

Apparently, nintendo is switching the voice actor for Mario

[rapid geode]

no one like chris prat?

i thought he was fin. better than a somewhat inappropriate fake italian accent

[south light]

I lost another tooth from bike cassette today

Twice in a week

I've never done that before this week

Thankfully got a spare cassette somewhere

[rapid geode]

get titanium cassette

[raw jasper]

oh, it wasn't Chris Pratt in the games :)

[rapid geode]

oooh

you mean they are finally removing the old game voice

good

haha

[raw jasper]

Apparently, they were re-recording it

It was the same person since super mario 64

(I imagine using the n64 samples would sound crunchy at this point)

In any case, I imagine, whoever the new VA is, will have to mimic Charles Martinet's (the former VA) voice for brand continuity reasons anyway

[rapid geode]

unless they want to go the movie way and mimic pratt

lose the accent

[raw jasper]

People have been theorizing that the the new actor has been featured in the newest game's preview trailer. If that's true, they'll be going for pretty much the same voice:
https://www.youtube.com/watch?v=JStAYvbeSHc

[rapid geode]

ah

[weary fiber]

Sunday's "National Cinema Day" and most theatres are doing $4 tickets to celebrate... so I'm DOING Barbenheimer

[raw jasper]

Are they putting them back-to-back? 😆

[edgy apex]

its gonna be a long cinema day

[weary fiber]

Yeah it's gonna be like 6 hours of movie

but it's barbenheimer

[raw jasper]

You'll literally enter in the day and leave in the night

I wonder how much of a whiplash watching the Important War Personality And Physicist Biopic Movie right after the Mattel Popular Doll Tie-In Movie actually is

(I haven't watched either of them)

[late fulcrum]

I've seen both of them, and they are (no surprise) very different films. However, they also both have excellent cinematography.

[raw jasper]

they are (no surprise) very different films
I...... can imagine that :P

Speaking of, it's been a looooooong time since I last watched a movie. Any suggestions (that won't scar me for life?)

[tranquil swallow]

Dune part 1

[late fulcrum]

Spiderman: No Way Home

[raw jasper]

Nah, I'd prefer to read the book. Speaking of, it's a good reminder to finally look into reading it

[raw jasper]

I'm surprised to see a superhero movie suggested! My impression of them was that they were formulaic "Guy Punches Things While Undertaking A Variation Of The Hero's Journey" movies

[glad ruin]

Your impression is (mostly) correct.

That being said if you want superhero movies that are not formulaic I recommend the Christopher Nolan Dark Knight trilogy.

[raw jasper]

That sounds like an interesting proposition

[patent hemlock]

the last one ain;t that good especially after Heath Ledger

[ebon dew]

To Have & Have Not, classic.

https://tenor.com/view/savmink-gif-21169728

[patent hemlock]

somethine kind of recent but is retro and twisty, try Atomic Blonde

[raw jasper]

I haven't heard of any of those

[patent hemlock]

and one that i think is totally under rated is The Man from UNCLE (no, seriously)

[ebon dew]

also, can never go wrong with Sneakers.

[patent hemlock]

oh yes!!!!!

[ebon dew]

Temple Grandin loved the Man from UNCLE. Temple Grandin also a great movie.

[glad ruin]

I thought it was pretty good. Maybe not as good as the second, but I liked it better than the first.

[rapid geode]

yes, no, maybe?

[tranquil swallow]

What tool do I need to observe the signals sent from the phone to drive the haptic motor

[slim shard]

I'll venture "oscilloscope"

[rapid geode]

the ol silly scope

[late fulcrum]

That and Black Panther were a couple of the standout movies for me in the past few years, even though they are superhero movies.

[raw jasper]

Interesting. Thanks for the suggestions!

[late fulcrum]

The Spiderman movie to me is an exploration of "what if", and storytelling. Black Panther is a complex and layered film. At first glance, it may appear to be a superhero origin story, but if you're paying attention, you'll see fascinating views of coming to understand things have shades of meaning, people you disagree with may have valid points, personal growth, and women quietly running things while the men puff up their chests and carry on.

[fossil dawn]

"Can I not reproduce the bug anymore or did I fix it?" is a very special kind of anxiety

[late fulcrum]

😬 I know that dismal feeling all too well!

[fossil dawn]

and it's kinda hilarious. 3 days of debugging, reading documentation and code and the fix might again be changing a single line of code

[raw jasper]

that's hardware for you

:P

[glacial wigeon]

ive had a bug fire only on the arm core, but not on the vpu core

and then after i added code to deal with it on the arm, it began firing on the vpu, lol

[raw jasper]

(the oddly excited chip emoji is really handy for these kinds of situations 😆 )

[raw jasper]

So, kind of a silly thought; Would it be possible to write a routine to test ("fuzz") your system with constrained randomized data?

(Known inputs are better too if you want to do regression testing, but sometimes fuzzing can help uncover new issues)

[fossil dawn]

I don't think that's really necessary. The issue occurs before any data is written to I2S

[raw jasper]

I was talking about inputs, not outputs

Like, your system most probably takes some input data, does some stuff to it, and outputs to somewhere

[fossil dawn]

right now it takes a wav file from an SD-card and plays it to I2S

currently there are zero user interaction, sensors, etc

[raw jasper]

Well, you could replace your sample input function with a random function

(Disconnect the speaker first xD)

[fossil dawn]

yes that would actually be a decent idea

Previously I played a sine wave and that worked really well. This bug only showed itself once I added the SD-card

With my "hopefully fix" I couldn't reprocude the bug yet!!! It all seems to work well! 😄

[glacial wigeon]

i need to generate some sine .wav's and figure out what is wrong with my audio driver

[fossil dawn]

But I don't (yet) really understand why that fixes it. So it's still kinda sus

[glacial wigeon]

i wonder, are there any CLI utils to generate a 60 second .wav with a single pure sine of a set freq?

[raw jasper]

sox?

Probably?

It's the kitchen sink of audio things

Yup, right on the money:
https://stackoverflow.com/questions/24236678/can-i-use-sox-to-generate-audio

[glacial wigeon]

[nix-shell:~/apps/rpi/lk-overlay]$ cat dev/audio/Makefile
SAMPLERATE := 48000

sine-500hz.wav:
        sox -n -r $(SAMPLERATE) $@ synth 3 sine 500

now i need some string manipulation functions in make....

[raw jasper]

This is never the start of something good...

[glacial wigeon]

i want to extract the 500 from sine-500hz.wav

i suppose i could use grep....

[nix-shell:~/apps/rpi/lk-overlay]$ echo sine-500hz.wav | egrep -o '[0-9]*'
500

[limpid sedge]

how to do i calibrate BNo085?

https://www.youtube.com/watch?v=Bw0WuAyGsnY

is it the same procedure as the video for 055?

[glacial wigeon]

[nix-shell:~/apps/rpi/lk-overlay]$ make -C dev/audio/ sine-1000hz.wav
make: Entering directory '/home/clever/apps/rpi/lk-overlay/dev/audio'
sox -n -r 48000 sine-1000hz.wav synth 3 sine 1000
make: Leaving directory '/home/clever/apps/rpi/lk-overlay/dev/audio'

make can now auto-set the freq...

[raw jasper]

tbh, I'd write a python script to parse the filename and call that from make

[glacial wigeon]

[nix-shell:~/apps/rpi/lk-overlay]$ make -C dev/audio
make: Entering directory '/home/clever/apps/rpi/lk-overlay/dev/audio'
sox -n -r 48000 sine-5000hz.wav synth 3 sine 5000
sox -n -r 48000 sine-10000hz.wav synth 3 sine 10000
sox -n -r 48000 sine-15000hz.wav synth 3 sine 15000
make: Leaving directory '/home/clever/apps/rpi/lk-overlay/dev/audio'

[nix-shell:~/apps/rpi/lk-overlay]$ cat dev/audio/Makefile
SAMPLERATE := 48000

all: sine-1000hz.wav sine-5000hz.wav sine-10000hz.wav sine-15000hz.wav

sine-%hz.wav:
        sox -n -r $(SAMPLERATE) $@ synth 3 sine $(shell echo $@ | egrep -o '[0-9]*')

but why involve python, when you just need to extract 5 digits?

[raw jasper]

Well, you may want to make your format more complicated later on

[glacial wigeon]

yeah

[raw jasper]

And string manipulation from shell is always iffy as far as I'm concerned

[glacial wigeon]

now, i need to get those files onto a usb stick....

'sine-10000hz.wav' -> '/mnt/sine-10000hz.wav'
'sine-1000hz.wav' -> '/mnt/sine-1000hz.wav'
'sine-15000hz.wav' -> '/mnt/sine-15000hz.wav'
'sine-5000hz.wav' -> '/mnt/sine-5000hz.wav'
'sine-500hz.wav' -> '/mnt/sine-500hz.wav'

ehh, lets raise them to 120sec first

if (open_file("/bad-apple/sine-500hz.wav", &audio, &audio_bytes)) goto unmount;

and modify my demo to load that file instead

bits per sample: 32
data begins at offset 0x50
5760000 samples in total
ASSERT FAILED at (app/bad-apple/bad-apple.c:275): bits == 16

dang, sox has too many bits per sample!

[raw jasper]

Looks like that's tunable
https://sox.sourceforge.net/sox.html

[glacial wigeon]

yep, i found -b 16 in the --help

now it claims its clipping

sox WARN dither: dither clipped 90062 samples; decrease volume?

[raw jasper]

Well, look for a volume option in the man?

[glacial wigeon]

and vol 0.5 causes errors:

sox FAIL vol: usage: GAIN [TYPE [LIMITERGAIN]]
        (default TYPE=amplitude: 1 is constant, < 0 change phase;
        TYPE=power 1 is constant; TYPE=dB: 0 is constant, +6 doubles ampl.)
        The peak limiter has a gain much less than 1 (e.g. 0.05 or 0.02) and
        is only used on peaks (to prevent clipping); default is no limiter.

ah, because it wants dB not float

hmmm, thats not making it happy....

to google!

ah, there is also a -v 0.9

doesnt help, still claims clipping

and even at 10%, its still ear-splitting

[raw jasper]

oh. :(

I guess you could script audacity instead?

It has its own scripting language (nyquist), and maybe a python iface

[glacial wigeon]

sox -n -r 48000 temp.wav synth 120 sine 1000
sox -v 0.2 temp.wav -r 48000 -b 16 sine-1000hz.wav

that worked

http://billposer.org/Linguistics/Computation/SoxTutorial.html mentioned that -v affects the input file

but synth lacks an input file

[raw jasper]

ooh ic

[glacial wigeon]

ooooo, thats a problem

its not producing a tone, its chirping!

[patent hemlock]

not necessarily -- there's awk sed grep etc.

[glacial wigeon]

it almost sounds like an alarm clock, lol

[raw jasper]

Yeah, but then you take their outputs and put them into shell variables and do God knows what with them

And everything ends up in this sloppy gooey mess that shell scripting always ends up in

[patent hemlock]

mostly eval 😈

[glacial wigeon]

ok, so the primary tone i'm getting, is 48khz sawtooth

but that cant be what i'm hearing

and my scope is too good for this, heh

i need more low-pass

[blissful roost]

Did you calibrate it for proper range though..? Don't want the MOA being too far out at distance. 😉

[glacial wigeon]

no calibration, just blasting a 1khz sine into the PWM peripheral

[blissful roost]

Well, that's no good... can't snipe the bad guys with that. 😛

[glacial wigeon]

and its coming out like an alarm clock, turning on&off at a 50% duty cycle

[raw jasper]

Is there a way to tune that?

[glacial wigeon]

changing the size of the dma buffer, does not change that pulsing

let me check some numbers...

[raw jasper]

ah, nvm, I thought that was what sox outputted :P

[glacial wigeon]

na, sox made a nice pure tone

my audio driver then turned it into a 50% duty cycle chirp

with a 16kb buffer, i can hold 4096 samples (32bits always)
but its in stereo mode, so 2048 samples

at 48khz, thats ~23 loops of the buffer per second

if i raise it to 64kb, its 5 loops per second, and no change to the chirping

whoa

it hit the end of the file, and stopped writing to the ringbuffer

the sound didnt change....

ok, i have a recording of it in discord, now, will discord let me download it, lol

https://cdn.discordapp.com/attachments/925048523379081296/1143555068566704138/voice-message.ogg

oh, does pwm have any irq's....

dont think so

bits 4/5/9/10 are active in the pwm status
4/5 mean gaps occured (buffer underflow?)
9/10 mean its active

so, if i clear those when they occur, and then check again...

yep, they are repeatedly occuring, so the hw FIFO isnt being kept full

while checking dma config, i noticed the dma is at the lowest priority

but fixing that didnt help

[glacial wigeon]

ok, interesting

there is a flag to repeat the last PWM sample when the fifo runs dry, that drastically changes the tone

which implies i'm dropping a lot of samples

switched to a spectrum analyzer on my phone, and i can see that 5khz produces a ~2500hz tone, when i allow repeating on underflow

[fossil dawn]

(It's really reassuring to read that I'm not the only person struggling with audio 😄 )

[glacial wigeon]

doh

i had a /2 in the wrong place

so i was only writing half the samples out of every batch

[fossil dawn]

lmao

I had basically the same bug at one point

[glacial wigeon]

that should have only been skipping input samples

so it doesnt explain the pulsing on the output

but its now a pure tone

but its still got a click on ringbuffer wrap, and the status register claims underflow

[lusty fossil]

If you put the AC on in your car and you put the temperature setting at about the halfway point or really anywhere below Max, that uses less energy than the Mac setting right? This seems very obvious but someone wants strenuously told me that it doesn't matter where you set the AC it always ruins your gas mileage or your range the same. I am more than the average level of familiar with thermodynamics so this doesn't really strike true to me but I've never looked into it.

[thick wind]

Considering only the AC unit, that is a very understandable point of confusion. In the perspective of the car, however, the AC unit is one of many parts of the car that is controlled by the serpentine belt, whose speed is directly proportional to the RPM of the motor. Hence, regardless of whether your car AC is maxed out, half power, or even off, the gas used is tied only to the rotational speed of the motor, which is only affected by how much you push on the gas pedal.

The biggest impact to gas mileage, from my understanding, is the acceleration efficiency, braking, and idling of the vehicle being driven.

[glacial wigeon]

but there tends also also be an electromagnetic clutch in that pulley, that can disconnect the AC pump

and it may be turning on&off, to maintain the pressure or set point

[lusty fossil]

This is along the lines of what I was thinking, there would have to be a PID of some kind in there otherwise he dumping excess cool and wasting energy.

Process control over PID I guess, you'd have PID either way.

[glacial wigeon]

ive seen some restaurant AC systems, have zero control links between the 2 ends

the unit on the roof just keeps the output at some PSI level
and the pump turns on when the PSI gets low, and off when PSI is high

the unit in the walk in fridge/freezer, then just uses liquid coolant as needed, with its own control loop

[patent hemlock]

the A/C compressor clutch is controlled by the A/C setting - whether or not that has a noticable effect on gas mileage was apparently tackled by the Mythbusters

[glacial wigeon]

another complication, is that a house AC unit, tends to recirculate the air, so it can turn off once it gets cool enough

but car's tend to have that turned off

[patent hemlock]

when i lived in TX I sure as heck made sure recirc was on -- no point in trying to cool down 100 degrees F when you managed to get the car temp below 90

[glacial wigeon]

depends on the region i guess

i'm in canada

[patent hemlock]

tbh, i don't think regionality is going to have much to do with it in the future -- everywhere is gonna be 🥵

[glacial wigeon]

i'm seeing a number of sidebands when playing a pure 10khz tone...

about 177hz apart i think

[dusty citrus]

You know global warming is a conspiracy, why else banks would give loans? /s

Time to build astronaut like suits with ac in it

[fossil dawn]

what app is that?

[glacial wigeon]

https://play.google.com/store/apps/details?id=org.intoorbit.spectrum

[glad ruin]

Oh that's a fun app

[fossil dawn]

looks interesting and maybe helpful for my project. Thank you 😄

[glacial wigeon]

it definitely helps confirm the freq of these pure tones i'm playing

i can instantly see when a bug turns 10khz into 5khz

ok, thats interesting

when i double the samplerate, and play every sample twice, the freq changes

4x oversampling, causes a nearly 1khz shift in the output!!

samplerate: 48000, range: 256
ref: 432000000, target: 73728000, divisor(f): 5.859375, divisor(fixed): 0x5dc0
actual rate: 86400000, 56250

because my clock divider isnt dividing right

i asked for 737mhz, i got 864mhz

> 432000000/5
86400000

because i forgot to turn the MASH filter back on

it was limited to integer division

[glad ruin]

Somebody say M*A*S*H?

[glacial wigeon]

M*A*S*H

with a MASH filter of 1, i now get 10002Hz

[glacial wigeon]

oh, interesting
i get those same peaks when i play the sample of my desktop, over an optical cable, into the same sound bar

[glacial wigeon]

rate: 48000
bytes per 2 samples: 4
10516411 samples in total
playing 8192 bytes per chunk, 42666 uSec each
buffer holds 1024 total samples
512 L+R pairs
10666 uSec per full wrap

  if (read_time > 1100) printf("read time: %d uSec\n", read_time);
  if (play_time > 42000) printf("play time: %d uSec\n", play_time);

every 8kb read, is completing in under 1.1ms, so it never printed a time
it must complete within 10.666ms, to prevent an underflow of the ringbuffer

the full read gets 42.666ms of audio data
and feeding that data to the ringbuffer never takes >42ms

because it spent an extra 1.1ms just reading the data, that got eaten out of its 10.666ms budget
and it quickly re-filled 1.1ms of the buffer, before playback blocked

sounds reasonably tuned, and not having underflow on the software side

played audio for 219125298 uSec
10518014 estimated samples played

an error of only 1603 samples

[raw jasper]

https://tenor.com/view/sad-rainy-weather-downpour-gif-12077926

Nah, some places are gonna be ^

But much of the western world is indeed gonna be 🥵 / 🏜️

[ebon dew]

Definitely going to be wet in TX today

Looks like Gert & Emily fizzled out but Harold popped up last night into TX.

[rapid geode]

soggy

[glacial wigeon]

static inline void arch_spin_lock(spin_lock_t *lock) {
    *lock = 1;
}   

🤦‍♂️

2 years after writing that code, i discovered, i'm missing the spin part of spin-locks, lol

it hasnt been a problem, because i'm in single-core mode, and i turn irq's off before getting the lock

so the lock itself is useless, the irq-disable is doing all the work!

[late fulcrum]

The little spring-loaded scissors in my AdaFruit "Midnight Hacker" version of a Leatherman Squirt broke, so I sent it to Leatherman for repair. They simply replaced it with a generic Squirt. I wish I'd known they'd do that, I would have just kept the scissorless Midnight Hacker. I'd just buy another one, but they're discontinued. https://www.adafruit.com/product/36

[ebon dew]

That's not OK. Contact them again and ask where your tool is and want it back?

I sent my grandpa's zippo from the 1960's to Zippo to repair. They repaired and sent it back. When Zippo says they'll repair it they will actually repair it.

[edgy apex]

repair != replace, thats just not cool

[late fulcrum]

Zippo is famous for that. They took out full page ads explaining how they repaired peoples' beloved heirlooms.

[edgy apex]

I made some new trinkets for my friend. He runs a computer repair shop and sometimes comes across mangled USB ports that can temporarily cause problems if they short so I made a USB "plug" that fits into the broken port so nothing bad happens and no one accidentally plugs something in.

[ebon dew]

neat idea, nicely done!

[edgy apex]

There were a bunch on thinigiverse but they all assumed the port was intact. Mine replicated the metal part of the USB plug so it will work if it's broken or not.

[rapid geode]

this looks normal....

[raw jasper]

Yeah, that's unacceptable. If they can't repair it, they should ask and offer to send it back

[glad ruin]

They do repair bigger ones.

I wonder though if sometimes they get yours, replace it, then repair and resell the original as refurbished.

(Still a scummy practice, but it makes sense why they would do it since they can essentially sell the same product twice)

[rapid geode]

rainbow!

[ebon dew]

nice selection

[rapid geode]

those will probably be the standard woods (that dont cost extra)

[ebon dew]

can you make an entire keyboard out of delrin keys 🧐 would it be so slippery you'd end up typing giberrish? 😆

[rapid geode]

you can buy POM keycaps

they ar moulded though

not cncd

they seem to be about $100 a set and have no engraving

or type of any sort

i guess cause you cant print them

[ebon dew]

eh i'll just use a q-tip to spread a thin layer of vaseline on my keys to see how it might work.

[rapid geode]

haha

[ebon dew]

pretty

[raw jasper]

The kitchen sink keyboard 😆

[rapid geode]

thats corian

i can definitely do a set of thems

but the cost is horrific

haha

$1500 for 60%

[raw jasper]

Sounds like something a True Sink Enthusiast would pay!

:P

[rapid geode]

(engraved)

[ebon dew]

yeah or flat hard ceramic keycaps. try typing on that with long nails.

[rapid geode]

ha

ive seen ceramic. was thinking of asking my friend if she can do porcelain

her skill is super thin and delicate porcelain

[ebon dew]

i lovvbvee meewyy newww keybooads

[rapid geode]

corian feels really ncie.

smooth and soft

[fossil dawn]

amazon sellers just write total garbage on their produc pages, or what am I missing? POM Keycaps out of PBT? Blank keycaps that are doubleshot? 🤔 😆

[raw jasper]

Oh the joys of Markov Chains

:3

[rapid geode]

POM is delrin

ohk i see, pic labeld wrong

ha

[ebon dew]

there's a delicate balance between soft and easy to clean

[raw jasper]

washes keyboard with bleach

[rapid geode]

corian is very easy to clean. what i meabn by soft is feel, not actual harness.

[raw jasper]

I mean, it's for countertops and sinks

[rapid geode]

yeah

pop key off, put in dishwasher..

ha

[ebon dew]

there used to be some membrane keyboards that would advertise they're dishwasher safe

[raw jasper]

https://firelogic.net/wp-content/uploads/2022/08/keyboards-in-washer.png

o_O

[rapid geode]

most keyboards can go in the dishwasher, as long as you dry them before plugigng back in

[raw jasper]

https://m.media-amazon.com/images/I/61RFw+dy7iL._AC_UF1000,1000_QL80_.jpg

[south light]

legitimately I have put a keyboard in a dishwasher before

I then rinsed it off thoroughly with IPA and left it somewhere warm and ventillated to dry

[raw jasper]

@fossil dawn
https://www.bleepingcomputer.com/news/security/scraped-data-of-26-million-duolingo-users-released-on-hacking-forum/
FYI

[fossil dawn]

rip

worth only $2.13
😆

Duolingos API and backend is a total mess

[tranquil swallow]

Their frontend is a mess too

[fossil dawn]

true

[tardy badger]

At least one on an 80 day streak working towards learning Japanese lol

[tardy badger]

Amazing work by the Indian Space Agency. The work of all their engineers, scientists, staff, etc.. landed a spacecraft on the moon this morning 😃

ISRO (Indian Space Research Organization) is the proper name

[tardy badger]

I should also note that they are the first country to land on the lunar South Pole

A huge accomplishment

[patent hemlock]

indeed!

[tender heron]

Yeah, it's really exciting. There's a lot to explore there and the research will help with planning additional manned missions to the moon.

It'll be huge if it can discover ice

[limpid sedge]

hi so im trying to power my raspi pico with a battery pack, and ive tried 3 different ones. all three of them will power it for a few seconds, like 10-15, and then shut off automatically. Why is this? All of these banks power raspberry pi zero with no issue.

[glacial wigeon]

smart battery banks will detect when the "phone" is done charging (drawing very little current) and turn off

the problem is that the pico uses far less power, compared to a zero

so the bank thinks your done charging

either find a dumber battery bank, or slap some high power loads on it

[limpid sedge]

how to do these?

[glacial wigeon]

https://www.amazon.com/Beside-Table-Lamp-Bedroom-Nightstand/dp/B0BZXNSW5K/ref=sr_1_5?crid=2IQJCSH9BEVRM&keywords=usb+lamp&qid=1692803908&sprefix=usb+lamp%2Caps%2C202&sr=8-5

something like this will waste some power, and might keep it on

[limpid sedge]

but i need to fit it into a confined area ...

[glacial wigeon]

ah wait, thats a 120vac lamp, bad result, lol

[limpid sedge]

lol

[glacial wigeon]

just a power resistor across the 5v could do

[limpid sedge]

what strength resistor? and across the 5V?

[glacial wigeon]

lets say we want to waste 0.2A, on a 5v source
ohms law says R=V/I
so a 25 ohm resistor across your 5v supply, will burn 200mA

which is 1 watt

so you need a resistor rated for 1W of load, and 25 ohms

[limpid sedge]

25ohms, connect where?

[glacial wigeon]

and it will put out 1W of heat

between 5v and gnd

[limpid sedge]

pico doesnt have 5v

[glacial wigeon]

it has a pin connected to the 5v of the usb

[limpid sedge]

?

which pin

[glacial wigeon]

VBUS i believe

a larger resistance like 50ohms, would waste 100mA

not sure how much the battery bank would need to stay on

[limpid sedge]

so a 25ohms resistor across the vbus and gnd should sovle it

maybe 50ohms

whats the color coordinations for 25 and 50?

[glacial wigeon]

https://www.digikey.ca/en/resources/conversion-calculators/conversion-calculator-resistor-color-code

red, green black == 25 ohm
green black black == 50 ohm

[limpid sedge]

ok, lets hopoe i have one of those ...

what way to read the colors?

[glacial wigeon]

whenever i'm not sure, i just test the resistor with a digital multi-meter

[limpid sedge]

oh

well i cant do that

ima check what i have RQ

any of these resistors work?

these are the only ones i have

[fossil dawn]

Resistors in series add up. so 10+10 = 20

[limpid sedge]

so 3 10ohm work?

also on a breadboard, how to do series?

[limpid sedge]

so if i put them next to each other

in a linear operations?

it will work

[glacial wigeon]

2 100ohm's in parallel would act like a 50ohm

[fossil dawn]

but no idea what power rating they are 🤔

[glacial wigeon]

and then youll get 100mA

[limpid sedge]

does that work?

[fossil dawn]

https://www.digikey.de/en/resources/conversion-calculators/conversion-calculator-parallel-and-series-resistor heh digikey has everything

[limpid sedge]

alright cool!

brown black black

3 of them

[limpid sedge]

just tried that

burned up the resistor

in 3 seconds

vbus to ground

[glacial wigeon]

that would be 1/4th of a watt per resistor
are those resistors rated for 1/4th of a watt?

[limpid sedge]

how to know?

idk, it just burned up and s tarted smelling i n 3-5 seconds

[glacial wigeon]

read the packaging or product description

[limpid sedge]

came with a random kit i had

no package

just a bag

[glacial wigeon]

check the product page for the kit

[weary fiber]

I wanna learn analog circuits more, but frequency-domain analysis & differential equations suck butt

(should be good at both as a junior in uni)

[late fulcrum]

I play with analog circuits a lot and rarely need either of those. Mostly, just simple arithmetic to figure out gains, feedback, voltage divider ratios, etc.

[patent hemlock]

since i'd mentioned my "stupid" multi-pi, multi-servo Rotomatic thing retriever (with "nag" function) a week or so ago - here 'tis #show-and-tell message

[raw jasper]

Do you have any resources to recommend for picking up analog circuit design?

(My instincts tell me the well-known "Art of Electronics" book probably is good, but I'm curious what your take on this question is)

[late fulcrum]

The Art of Electronics is the 800 pound gorilla. All the information is in there, but it's rather a lot to take in. Learning The Art of Electronics is useful too, but it's more of a hands-on, lab-based approach, and you'd have to round up the various equipment to do the projects (it's basically the lab notes for a course). Unfortunately, I don't have any go-to references to point to. The Forrest W. Mims books are good, and various articles (like "Transistors 101" on the AdaFruit learning site). I picked up the basics from an electronics learning toy (Lectron), that is unfortunately no longer made (there are others out there, like the old style "101 in one" electronics kits, Snap Circuits, Gakken, Brick R Knowledge, etc.). These days, I generally suggest getting some basic parts (resistors, capacitors, diodes, transistors, an op-amp or two, maybe some LEDs, potentiometers, switches, etc.) and a solderless breadboard and build some stuff. You'll also need some sort of power supply (a 9V battery or USB charger is enough to get started), and probably a voltmeter (even a cheap one is entirely suitable for learning). For me, building simple circuits to get the feel of how the components and concepts actually work was the most effective way to learn.

[patent hemlock]

as a recent "learner" myself, I second the above recommendation -- i personally got one of those pretty cheap raspberry pi "learn electronics" kits and got the basics (it's not necessarily where my interests lie, so i'm not building circuits, but it's been horribly useful in understanding when things go a bit sideways)

(pun intended)

[raw jasper]

||I will probably just end up using spice. Less money to burn on components||

[tranquil swallow]

All you need is like $5000 to get everything you need

[late fulcrum]

Spice lets you try stuff and see traces on an oscilloscope basically for free, but I don't find it as fast or interactive as just plugging components in and watching what they do. Discharging a small capacitor through an earphone is an effective way to perceive the charge on it, the equivalent experience in Spice is just a scope showing an exponential decay, which (to me) doesn't bring the same intuitive understanding. However, everybody learns differently so what works for me may well not work for someone else.

[late fulcrum]

Less than 1% of that to get started.

[dusty citrus]

Unfortunately all edas/simulators seems to be stuck at the 90s . But building toolsets it's also a pain

Everyone has a different approach and that's fine, the op shouldn't suck up on the best thing it's all marketing.
In my opinion it's beat starting with a project, without overthinking

[late fulcrum]

I was helping someone debug the MightyOhm Geiger counter kit, in particular the high voltage power supply. I intentionally did a sloppy build of the same circuit on a breadboard to see how tolerant it is to construction technique. Turns out it's a pretty reliable circuit, even in this form (the problem turned out to be a more basic mistake). I like the instant gratification of building stuff like this. Some projects move on to perfboard or custom PCBs, but I can do a lot of debugging/testing/optimization quickly this way before I commit to spending time, money, and effort constructing a fancier version.

[raw jasper]

Why is ⚛️ in the same background as the religious symbols?

Is there an atomic religion?

(This is a serious question)

[raw jasper]

On the one hand, I agree, but, on the other hand, using spice will give me background I can use for things like characterizing "challenging" paths in a (digital) chip, so it's more worth it to me than buying a bunch of components I might not even get around to using.

Plus, to do analog justice, I'd need to get myself an oscilloscope anyway, which adds a startup cost of at least EUR300; No cheap vacuum tube oscilloscopes around here :P

[tranquil swallow]

Raspberry Pi 4 exacted a heavy toll on my wallet

[raw jasper]

bought from a scalper?

[late fulcrum]

Good point, the goals influence how to experiment as well as personal preferences.

[tranquil swallow]

Worse, an authorized reseller

[glacial wigeon]

RPF tends to make them a non-authorized reseller, if they charge too much

but only if its for the bare pi itself

a kit including other parts, can have whatever markup they want, because RPF cant decide how much the book or keyboard is worth

[south light]

i havent seen a single authorised reseller charge over RRP (pre taxes)

[south light]

Actually, they do decide there too

The book, keyboard, powersupply and pre-imaged SD cards are all via themselves, and packaged by themselves

[sick apex]

anyone know what board this is

i cant write anythign to it without knowing and it was from ali express so the listing name was dreadful

when i plug it in it doesn't say anything about the name in the info

but it runs the pre installed network scan script

[raw jasper]

Well, that's what you get for getting shady..... pentest gear?! off aliexpress

[sick apex]

nah

[raw jasper]

Who buys pentest gear off aliexpress?

[sick apex]

just a board

i didn't buy a pentest anything

it just shows the wifi networks

[raw jasper]

Ah, I thought it was a pentesting thing :)

[sick apex]

doesn't do anything else i think its just to show the screen works

it has a whole boot sequence

full red, full green then full blue

then it shows the TTGO logo

then shows the ssid list

or the input voltage

[umbral phoenix]

https://www.lilygo.cc/products/lilygo®-ttgo-t-display-1-14-inch-lcd-esp32-control-board one of these variations

[sick apex]

exactly that

the exact one in the picture

lemme see if its on platformio

haha good job it has the pinout

the pin labels are covered

imma print that out

i brought ink directly from epson and it still tells me that my ink isnt genuine

[raw jasper]

Well, why not refill your ink tank?

[sick apex]

dont have ink tank

only cartridges

unfortunately

[raw jasper]

cartridges are refillable too ;)

[sick apex]

oh yeah i can just buy

ink

and put it in there

why did i never think of that

[raw jasper]

It's a bit more complicated than that

But it is possible

[sick apex]

i'll figure it out

[raw jasper]

Worst case, there's probably a shop around your neighborhood that will refill your ink cartridges for you

[sick apex]

nope

there isn't any tech shops near me

i am the nearest tech shop

[raw jasper]

lol, ok

[sick apex]

the closest one is like 20 miles away

[raw jasper]

Anyway, look into refilling your cartridges

[sick apex]

i will

[raw jasper]

If it's gonna complain at you that you don't have genuine cartridges, might as well :P

[sick apex]

i brought a massive 3.8 inch touch screen

well massive in terms of micro controllers

has an SD card slot on it

im gunna connect it up with an esp32 and my CC1101

and see what cool stuff i can make

maybe like a RC car with a camera

or something

touch screen controls

Picos are so cool

i wanna use the rp2040 to make a custom board but its so expensive to have it soldered

[wooden ibex]

who here knows C# and windows forms i could use a little help with this rotary trinky. help would me much appreciated

[tardy badger]

It’s better to ask the question, if someone can help they usually will 🙂

I might suggest asking in #help-with-projects as well

[wooden ibex]

fair enough thanks

[night crescent]

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

[night crescent]

WE ARE LIVE! ASK AN ENGINEER! https://youtu.be/vc3cAlrJECY

[fickle aurora]

Is the Circuit Playground Bluetooth discontinued? Seems like it's been out of stock for ages

[ebon dew]

There are a lot of parts on that one and if there's a shortage still on even 1 of them it would require a redesign. If you only want the BLE capability there are other NRF52840 options available in the store. https://www.adafruit.com/search?q=nRF52840+

@fickle aurora The Feather Bluefruit Sense would be a close 2nd to a Circuit Playground Bluefruit. https://www.adafruit.com/product/4062

One of the benefits of the feather form factor is the myriad of featherwing addon boards.

[fickle aurora]

I might end up doing that, thanks. The CPBlue has an attractive price!

[sharp nexus]

Had any of you tried teleportation under a certain frequency of 425-450MHz on electrical coil? It was found in CIA papers.

[tardy badger]

That’s how I get to work every morning 😛

No, I have not heard of that even being possible

I will tell you this: just because there’s a government paper discussing something, that doesn’t make it true.

[limpid sedge]

i couldnt find anything https://www.sunfounder.com/products/pico-starter-kit

[late fulcrum]

From the picture, they appear to be ordinary ¼ watt metal film resistors.

[limpid sedge]

oh so that explains it

[dusty citrus]

Bleah, random cables and placements as they told me

Either 80m cables or 0.5m cables are in stock to be used

[late fulcrum]

That's about par for the course. At least they color coded them (white for "network")

[dusty citrus]

Yeah but f me this mess as if I can't pass some cables, but I was told to do so...

[tardy badger]

It’s that time of year when defense companies realize they’re behind on spending and are requiring minimum 10% OT

Happy autumn lol

(Even though it’s summer until sept 22nd)

[late fulcrum]

So order a hammer or headlight, problem solved.

[edgy apex]

I was showing a friend a few of my pi zero 2 projects and then showed them my cm4 that didn't have a purpose yet. They said why don't you redo one of the pi zero 2 projects with the cm4 and I was like 🤯

[late fulcrum]

I'm not sure what you mean by "pass some cables", but it looks easy enough to do, especially if you were told to do so.

[edgy apex]

I'm gonna redo this little friend. Pi zero 2 -> cm4108032. V1 picam -> HQ cam+telephoto lens and I'll have to figure out battery power and cases

[late fulcrum]

What is it? A camera module that ... clamps onto ... something?

[glacial wigeon]

the wing on the right is probably the HQ camera holder
the round bit on the left, a support for the external lens
and i see an rpi0 in the bottom

[raw jasper]

Is it just me or has aliexpress search become less performant?

[dusty citrus]

Wdym? As search it has been trash
For coupon and free stuff and tax free products, then yes absolutely
The customer support, and purchase protection then absolutely yes, the alimebot is unskippable
Shipping, no it has become faster and less items have been lost

[raw jasper]

Ah, I have regularly been getting "no results found" errors for products I know exist

[dusty citrus]

Like?
Try searching with google instead

Although I have seen drugs and counterfeit items for sale, they're quite quick to turn those off

[raw jasper]

Oh for God's sake, I was just looking for the mangopi single board computer

And yeah, of course searching on google with site:aliexpress.com will always work

[late fulcrum]

I'm just looking for 氦氖激光

[dusty citrus]

Mangos are drugs, by weigh they're more expensive than cocaine 🤣

[raw jasper]

https://tenor.com/view/mabushii-blinding-bright-so-bright-too-bright-gif-15795682

[raw jasper]

At this point, I am legitimately surprised the censor bot blocks good old innocent curse words, and does not block.... this

[late fulcrum]

I had a reply yesterday that included the name of part of an air conditioning system but it was blocked

[solar kindle]

At first glance, I thought it was a scale model of the computer from "War Games".

[ebon dew]

Someone is active working on that and a scale model of his bedroom. Theres a blog post about it.

[blissful roost]

That's not a burger!

[edgy apex]

That would be cooler than what I'm doing. I am hoping that upgrading the camera will give me a better result overall and the cm4 will allow realtime object detection in 720p. It doesn't make sense to do anything higher res than 720 because that's the resolution of the HDMI hud and 720 should work at a decent frame rate. The main caveat will be going from picamera to picamera2 because I haven't played with it yet.

[tame coral]

oops

please nevermind my previous message

[urban arrow]

I'm going to put a Big Fat Note on my wall... "Remember to do the group.append()" when creating a new Label. Good grief - I've forgotten to do this many times, and then wonder what's wrong when it don't show up...

[tardy badger]

Just canceled my xfinity internet service 🎉

Getting internet from a local provider doing symmetrical gig fiber 🤓

Also cheaper too which is nice

[hard estuary]

My internet went down almost half switching from Xfinity to gig fiber a couple years ago too

[rapid geode]

i have to fix the roof on my shed this week and its been constantly raining

i have to physically take the whole roof off and change the pitch. sigh. haha.

[late fulcrum]

I wish I could switch from comcast

[rapid geode]

no matter who i switch to here it actually the same compnay. they just put different names to pretend its competition

[tardy badger]

https://tenor.com/view/spider-man-we-one-gif-23865574

[tardy badger]

Time to set up your own isp

Lol

Bodger Networks

Piecing your internet together, one bodge of bits at a time

[stuck moth]

is it utopia fiber?

[tardy badger]

It’s called Avative

[stuck moth]

nice!

I can't give up fiber

[late fulcrum]

I wish for fiber

[tardy badger]

😌

[late fulcrum]

Which app is that? I'll try mine.

[tardy badger]

This is in the management app for my Ubiquiti Dream machine pro

[late fulcrum]

Hmm, I'll try a generic one. Opinions vary about which ones are accurate.

DSLreports seems dead, this is Ookla's speed test

[glacial wigeon]

do you want to cry?

that download figure is off, its 50% faster, but i'm limited by my network cables, lol

[late fulcrum]

About a gig, same as skerr

[glacial wigeon]

my isp is offering 1500mbit down

fiber SFP module, directly into the router

[late fulcrum]

Maybe I'll move to Vermont where you can get 10G

[glacial wigeon]

the cat6 coming out, is incapable of using that all at once, on a single port

[tame coral]

Quick question, are mg966r servos continous? Can they turn 360⁰ and more?

[glacial wigeon]

lets see... enp4s2f0 is my WAN interface

ive got too much internet, rarely using even 10% of it

[tardy badger]

Cat6 supports 10G in short distances

It’s part of the Cat6 spec

[glacial wigeon]

but my switch doesnt

[tardy badger]

Get a better switch 🙂

[glacial wigeon]

so i would need a new switch and NIC's all around

though, i think my new mobo is 2.5g

[root@amd-nixos:~]# mii-tool enp8s0 -v
enp8s0: negotiated 1000baseT-FD flow-control, link ok
  product info: vendor 00:07:32, model 4 rev 0
  basic mode:   autonegotiation enabled
  basic status: autonegotiation complete, link ok
  capabilities: 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
  advertising:  1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control
  link partner: 1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control

[tardy badger]

I can do 10G SFP on my UDM Pro

[glacial wigeon]

odd, i remember hearing about 2.5

where did that box go...

[tardy badger]

Unfortunately I’m only paying for 1G so cat6 is fine

I will be using fiber on my file server whenever I can build it ™️

Or at the very least, a 10G DAC

Not that I’ll ever use that much

I just want to over engineer it

[late fulcrum]

I don't think so. For 360°, you can use "winch" servos, some of which go 2 or more full revolutions, or "continuous rotation servos", which aren't really servos, just DC motors and controllers in servo housings, where the input signal controls the speed and direction instead of the position.

[olive dome]

I'm just waiting for those low cost 10G switch to start entering US market so I can upgrade my local network...

Also patiently waiting for low cost 5G NIC so it max out RPI's PCIe link

[raw jasper]

I'm wondering whether there is a laptop with a huge SFP connector built-in

[olive dome]

honestly you can do it yourself with framework laptop 16"

[raw jasper]

Wouldn't the cooling requirements be kinda prohibitive?

Anything that takes SFP in isn't going to be very... passive :P

[olive dome]

the PCIe capable expansion slot for the 16" is designed for GPUs in mind so I think it will be fine

And honestly I don't think 10G SPF fiber will consume much power either

[raw jasper]

I thought fiber network cards expected server-grade airflow

I've never had one myself, since my LAN is still in the gigabit age, and I don't manage network stuff anywhere

[olive dome]

I don't think that is the case because it is used on stuff other then server a lot, like the FTTH or even just pro consumer routers.

[raw jasper]

Then I'm probably wrong. I've never seen an FTTH installation :P

[olive dome]

I got to see AT&T laying out the fiber on my backyard : D
The happiest thing I have about AT&T

[raw jasper]

fabric? ?

[glacial wigeon]

my old FTTH setup, had the fiber going into a lobotomized router

it had 4 1gig ports, 2 pots ports, 1 fiber port, and battery backup

only 1 ethernet and 1 pots port worked, and it had no config (lobotomized)

[olive dome]

Ah sorry fiber

[glacial wigeon]

the ethernet ran to a router, that was dealing with the 802.1q (vlan tagging) and 2 uplink NAT, and offered wifi

[raw jasper]

Fiber -> WiFi sounds like a downgrade to me :P

[glacial wigeon]

ethernet was also available

and thats what i primarily use

[olive dome]

AT&T FTTH router's WiFi is supprisingly good enough

[glacial wigeon]

after the most recent upgrade, they ditched the lobotomized router acting as a modem

[olive dome]

Like WiFI6 and everything

[glacial wigeon]

the fiber now SFP's right into the new router

[raw jasper]

I have no idea which version of WiFi I'm on. All I know is that it's very slow for LAN transfers, but that's probably because of the ISP's router being what it is

It may even QoS LAN traffic in favor of internet one, because LAN speed << Internet speed

[olive dome]

Yeah LAN transfer between wireless client is pretty bad always

[raw jasper]

Why?

[glacial wigeon]

device->device transfers arent allowed
it must be device->accesspoint->device

so your bandwidth is instantly halved, if your transfering between 2 wireless devices

[raw jasper]

ooh

[olive dome]

Well just in terms of how it will operate, you will need the access point to handle the traffic on the same spectrum

[glacial wigeon]

that AP is responsible for forwarding the packets, if its between 2 wireless clients, because WPA means they dont know eachothers keys, and they may be at oposite extremes of range, and unable to hear eachother

[olive dome]

I did try to build my own router but I ran out of CM4s

Cellular too, just in case AT&T being AT&T

[raw jasper]

That's a custom pcb, right?

[olive dome]

yes

[raw jasper]

oh btw re: WiFi

I remember WiFi also had a P2P mode

The nintendo DS used it

[olive dome]

WiFi Direct is the marketing term

[raw jasper]

I wonder why clients don't multiplex between a P2P mode an AP mode for internet access when doing a lan transfer

[olive dome]

I think it is how Airdrop work?

[raw jasper]

No idea :)

But it'd be cool if there was a CLI utility to set up a wifi direct link between two devices, and use that for ssh, rsync, etc

and time-division multiplex that with the connection with the AP

[late fulcrum]

It's a BOT. Why do I have to wait for it???

[raw jasper]

https://tenor.com/view/asimo-gif-7555038