development

[copper ravine]

Ah right on

[bitter edge]

Just decided to go without the 3d model

[copper ravine]

You still need the matched pairs between the controller and the usb connectors

[rancid nimbus]

So, your pairs of wires look like they need to be closer together. Also the wire length's need to be matched. I think both might have been said already. (Not ee just a speculation based upon looking at other high bitrate devices.

[bitter edge]

Ik this is just seeing if I have the base idea right

I'm like 1/20 finished with the actual thing

[copper ravine]

The length doesn’t need to be matched, just reasonably close to the same length. Trace width and separation is more important

[bitter edge]

Another thing , Gotta figure out how to edit trace width

[copper ravine]

That is usually in your Design rules for the pcb layout program

[bitter edge]

Yeah but when I autoroute it will change them all

[copper ravine]

No; you create labels for each of the wires (called “nets”) and you assign a trace width and spacing to each. The autorouter should follow those rules. Also it is highly likely you will have to route those impedance matched traces manually

[bitter edge]

I use the auto router to escape manual work ; - ;

[copper ravine]

Electronics is a bunch of hard work to get it right :)

[bitter edge]

I feel bad for this guy

This seems like work

[copper ravine]

Yup it sure is. And that is a small schematic with a pretty straight forward design. The client I have right now has about 20 pages of fairly complex schematics for their product

[nocturne galleon]

the schematics are the easy part ime lol

routing shit takes ages

[bitter edge]

When I first tried doing this I skipped schematics

Which was a pain in the ass because it didn't show me which pins were which pins

So now I use schematics

[bitter edge]

What's it for

[copper ravine]

UPS for data centers

[bitter edge]

After hooking up parts of the down stream ports I have like 21 capacitors and 8 resistors

[bitter edge]

Still not done and still need charging and the switches

@copper ravine also do you know what FB is it says uh "220 @ 100MHZ"

[copper ravine]

Which pin?

That's a really small screenshot

[bitter edge]

Uh wait wrong screenshot hold on

[copper ravine]

oooh

FB -> Ferrite Bead

And the specs for the ferrite have to be 220H @ 100MHz

[bitter edge]

And what's the board Pv thing

[copper ravine]

your 1.1V power supply for the controller ship

The data sheet assumes the user knows how to design one

[bitter edge]

Ik nothing

[copper ravine]

That isn't the power supply.. that's the filtering needed to interface to the power supply you need to design/provide

[bitter edge]

I uploaded that a while ago it just now decided to appear

[bitter edge]

So um how do I design one

[copper ravine]

That's an entire field of electronics by itself. I would look online for examples and figure out from there.

[bitter edge]

Yk what's funny I Google it and the first result was a forum for a ti chip

[bitter edge]

Uh what's DN1_VBUS because that isn't a pain

Pin*

[copper ravine]

no idea, what does the datasheet say?

[bitter edge]

https://www.ti.com/lit/gpn/tusb8041

I am not good at finding things in the dat sheet

[copper ravine]

oh, that's the VBUS from the downstream 1 usb connector

It is referenced in the VBUS power switch schematic on page 28

[gilded moon]

So I’m trying to build a program on Windows 10, it provides a vcxproj file, and I have the build tools for Visual Studio 2022 installed, but it keeps failing saying some .cpp file is missing, do I need the whole of Visual Studio installed? I’d like to keep it to just the build tools if I can

I have the Visual C++ redistributable 2015-2022 installed for both x86 and 64

[bitter edge]

So it looks up to the chips

[copper ravine]

kinda. That is the VBUS from the power switch chip. If the power switch detects a higher than 2A (or whatever you set it for) load, it will disconnect the VBUS to that port.

[gilded moon]

turns out that msbuild doesn't grab the C++ compile tools by default, what the hecc

[silk eagle]

probably a "visual c++ redist" google search

[bitter edge]

i don't think auto router can handle this

bruh decreasing it can't make up its mind

fuck

slowly getting there

[supple hull]

Well i just played with real world coding stuff with OpenAI and tried to see how close I could get it to do a few things like filter an array of objects by year in JS, it got close but couldn't figure it out the year part and was stuck on ranges. Impressive though. It does a good job at taking jQuery to ES6.

The most impressive stuff it does is mock up dummy data

[peak acorn]

That's cool lmao

[supple hull]

It seems really good at doing stuff like shitting out regex and such

[peak acorn]

I've heard copilot is amazing at generating and describing regex strings

[supple hull]

Here's me asking it to create a regex for a common pattern for like a password

[peak acorn]

Wow is this the correct formula?

[supple hull]

You can use the regex generators to do this already but its so damn fast

[supple hull]

fuck me if I know, I'm a UX developer 😛

[peak acorn]

lmfaooo

[supple hull]

not a game developer

[peak acorn]

really cool

[supple hull]

I've found edges with it but if you give it a script want to convert it, it can assist porting. I was messing around and it seemed to take a node script and make it into PHP. didn't run it to test

However, like you ask it to create a stateful functional React component that make a color palette picker, it'll just make a component that has a hex value, and be pretty happy with itself. Impressive as it does create a component that has a color but color picker it is not.

[peak acorn]

It's definitely very happy with whatever it generates lol

[supple hull]

It should end every output with 💯

[peak acorn]

im gonna try to use it to generate my networked python homework assignment later lmao

[supple hull]

Ha

[peak acorn]

See what it's like to use it as a tool to generate specific functions

[supple hull]

I've taken example callback hell and it seems to fix it

[peak acorn]

Funny how it thinks C passes by reference

[rancid nimbus]

It doesn't work like that.

[peak acorn]

I know, thats what it thinks though

[rancid nimbus]

It is confidently wrong.

[peak acorn]

Is the multiplication incorrect?

or the overall rotation formula i mean

[rancid nimbus]

I am curious too.

https://en.m.wikipedia.org/wiki/Rotation_matrix

[storm berry]

one obvious point is that the comment saying a, b, c, and d are 4d vectors is off

[peak acorn]

wdym

abcd would be components of a 4d vector

and then uvwx is the components of the axis vector

[storm berry]

yea, but the program says they're each 4d vectors

[peak acorn]

oh yeah that part is wrong for sure

[storm berry]

also this is a pretty big flaw lol

[peak acorn]

yea but it would take like 4 seconds to fix

obviously if the actually algorithm there is wrong then its completely useless, but if its right that would actually be useful lol

U just change it into some structs or smth and boom ur done

(not actually done since 99% its more performant to use a library or simd instructions but bla bla bla)

[ornate summit]

Does anyone happen to know if you can use the GL_NV_gpu_multicast extension on Quadros?

[bitter edge]

someone give me a challenge to do in js

[humble mirage]

advent of code 2022 is currently happening if you're into that

[bitter edge]

Uh what

[hollow basalt]

yes

[humble mirage]

it's an advent calendar of programming puzzles

[bitter edge]

I just wanted to test open ai ; - ;

[bitter edge]

So whats the link

[humble mirage]

https://adventofcode.com/

[bitter edge]

Tf am I supposed to do

[humble mirage]

you click on the row with the 1 after it

[bitter edge]

Idk if this is gonna do anything lmao

/* The first Elf is carrying food with 1000, 2000, and 3000 Calories, a total of 6000 Calories. /
var food = [1000, 2000, 3000];
/ The second Elf is carrying one food item with 4000 Calories. /
food.push(4000);
/ The third Elf is carrying food with 5000 and 6000 Calories, a total of 11000 Calories. /
food.push(5000);
food.push(6000);
/ The fourth Elf is carrying food with 7000, 8000, and 9000 Calories, a total of 24000 Calories. /
food.push(7000);
food.push(8000);
food.push(9000);
/ The fifth Elf is carrying one food item with 10000 Calories. /
food.push(10000);
/ In case the Elves get hungry and need extra snacks, they need to know which Elf to ask: they'd like to know how many Calories are being carried by the Elf carrying the most Calories. In the example above, this is 24000 (carried by the fourth Elf). /
var max = 0;
for (var i = 0; i < food.length; i++) {
if (food[i] > max) {
max = food[i];
}
}
/ Find the Elf carrying the most Calories. How many total Calories is that Elf carrying? */
console.log(max);

In conclusion open ai isn't very smart at this

Bruh

[peak acorn]

Lol

[bitter edge]

Bruh it can track my mouse

But when I tell it to create a spinning donut it loses its shit

I got it to create a Pokedex ; -;

I got it to make FNAF lore 💀

[wispy knot]

look at pictures in the terminal, cross platform

[storm berry]

can you zoom in with it

[bitter edge]

how u do that

[bitter edge]

tf is mewthree

[wispy knot]

It is just printing images to the terminal

[wispy knot]

Code

[bitter edge]

but what is it ;- ;

[bitter edge]

bruh it stopped at Pidgeotto

[cursive root]

dude there are over 800 pokemon; you're gonna waste away your entire trial credit with that 😂

[wispy knot]

got it to work with videos

[cursive root]

each of those rectangles is the character ▮or one just like that painted with different colors. I guess you'd just open an image, subdivide the image in whatever amount of characters fit on the screen, get the main color in that section and get to printing

[cursive root]

nice

[wispy knot]

When you try to play Halo Infinite

[cursive root]

🤣 very nice! [Epilepsy warning alert]

I tried to do it with just an image using ChatGPT without thinking too much about it and well, it didn't work, but after replacing a few things (using ChatGPT to do it) it..... well, it also didn't work

but it came close!!

[cursive root]

oh, now that I look again there were just a couple of stupid errors; a few generated by the AI a few generated by me

good enough for a couple of prompts and a couple of fixes

[wispy knot]

ye

[bitter edge]

it can handle about 10 before it gives up

Small steps :))

[storm berry]

I made a cli based image viewer that you can zoom with

[wanton orbit]

So where can I share my platform hehe

[hollow basalt]

#platforms

[twilit beacon]

#platform

turns out there is none

[bitter edge]

Wuts platform

[peak acorn]

Platform is a buzzword for a service for almost anything that people use

[wispy knot]

cool

[silk eagle]

wanna see my platform some dork leaked his code on a site called GitHub so I just stole that haha massive oversight by them.

[peak acorn]

Lol

[bitter edge]

well now we wait

damn it broke

[cursive root]

🤣🤣🤣 nice one

just tried it differently, asking it for an HTML page that does that instead, and succeeded

[bitter edge]

does it create infinite buttons

bc i want it to create a button that just creates more buttons

and have those buttons create even more buttons

and then have those buttons to create more buttons and so on

this works but u gotta press it for every button

[nocturne galleon]

https://media.discordapp.net/attachments/929044598456737824/1032095617851338892/Untitled.png?width=585&height=585

[peak acorn]

if ur task aint 'embarassingly parallelizable' dont parallelize it 😎

[nocturne galleon]

i sure do love when github actions gives a different gradle build output than my local build >.<

updating gradle seems to have fixed it somehow?

[peak acorn]

gradle is a cursed technology

all java build chains are really

[nocturne galleon]

i- i feel like this is an actions issue now, i just removed a debug print i forgot to from a while ago, and it's clearly not there anymore, but the actions binary has it

i'm not even caching anything wtf

[cursive root]

I asked it for two versions, one that adds a single button when any button is clicked and another one that duplicates the amount of buttons there are. Both worked 👌

[bitter edge]

@copper ravine what do you think about this routing

[copper ravine]

Clean; did you calculate the trace width and spacing for the data lines?

[bitter edge]

no

I just looked at this and tried to space it out as much as I can

[copper ravine]

Then the upstream routing likely needs to be fixed

[bitter edge]

also I didn't see where it said trace width needed to be edited

it just said it needed to be 5x further

wait I'm dumb and I read that wring

wrong*

wait or did I

[copper ravine]

They are "impedance matched": this means there is a electrical relation between those two data lines (they are each a differential pair)

Yeah, the distance between pairs is to eliminate crosstalk between pairs

[bitter edge]

I was gonna space them a bit further before I forgot how to rebuild gnd -;

[copper ravine]

See, part of the impedance matching is to have the ground plane pulled away from the pair traces.

Also the thickness of the PCB and whether there is ground plane or other signals running under those pairs matters

[bitter edge]

so how thick should the pcb be

like 1.2 or 1.4

[copper ravine]

usually 1.6mm

[bitter edge]

alr

[copper ravine]

I think

[bitter edge]

I have to figure out how to rebuild it ;- ;

[copper ravine]

But also, that doesn't matter; whatever the thickness is, you have to adjust the traces

[bitter edge]

what's wrong with them

[copper ravine]

Look up how to calculate and impedance matched trace pair

the space between the two traces of each pair has to be a certain distance, the space between the ground plane and the trace pairs has to be a specific distance and the width the traces have to take the thickness of the PCB and what's under them into account.

Or just forget about USB 3.0 speeds and it will work fine running at USB 2.0 speeds

[bitter edge]

this is getting difficult

and I still haven't found out how to make that power supply

[copper ravine]

Doing a layout for a USB 3.0 device is not "trivial"

Although it would be something that I would expect an EE grad to be able to do

[bitter edge]

it is when you're very stupid

[copper ravine]

I said it "is not trivial", i.e. it is moderately difficult

[bitter edge]

there goes my stupidity

do you have a schematic of where the 1.1 3.3 and 5v volt rails come from

bc idk what I'm looking for exactly

[copper ravine]

I'd have to look later; I'm in the middle of getting my kids ready for bed

[bitter edge]

oh that's fine

I have a feeling it has smth to do with this thing

[rancid nimbus]

I was listening to the "amp hour" podcast and one of the two of them mentioned that for non theory and real-world PCB design hobbyists can do PCB design ok and just out of college grads have a tendency to struggle. I think it had something to do with college classes not requiring much if any PCB design.

[rancid nimbus]

I think you might need a voltage regulator to bring the voltage down to those voltage levels. You might be able to get one chip for all voltage levels, but you could get separate chips.

For 5v that logo is an option.

[bitter edge]

but what tf am I supposed to hook it up too

like this wouldn't be an example of hooking smth up to a 5v rail

[rancid nimbus]

Yes that looks correct. Looking a bit more zoomed out would be helpful.

Are you going to use USB c for the side that connects to the computer?

[bitter edge]

uh no ti chips for some stupid reason want usb b

[bitter edge]

what is the 5v connected to

how tf does it have 5v where is the source

[midnight wind]

wdym?

where does 5v come from?

you have a 5v rail

[rancid nimbus]

Use a voltage regulator.

https://en.m.wikipedia.org/wiki/Voltage_regulator

A voltage regulator needs to be connected to a source. If you are not doing type c vbus could be hooked up to vcc and vss on the USB connector connecting to the computer.

[bitter edge]

I am fucking confused rn

so ALL I HAVE TO DO IS PLACE DOWN A THIS

a +5 and use a regulator

[rancid nimbus]

For the 3v3 and 1v1 you will want a voltage regulator. You will have to find one that takes in 5v and provides the 3v3 and 1v1 output.

[bitter edge]

how do I know which regulator to use

[bitter edge]

so could I use this thing for the 3.3

[midnight wind]

I'm confused on what you are confused about...

[rancid nimbus]

Ok, just check the current requirements.

[bitter edge]

uh

[rancid nimbus]

Your USB chip will presumably draw current on the 3v3 rail. You will want your voltage regulator to handle more than the USB chip needs.

[bitter edge]

I'll focus on that later

[bitter edge]

I got a question about this where tf do I plug this into

[rancid nimbus]

You will have to read to determine if you want the high or low to get it to give an output. There will be some documentation on what voltage level that needs to hook up to.

[bitter edge]

but what about Chip Enable

[peak acorn]

on circuits the 5v labels are just abstractions for the source

[bitter edge]

how's that supposed to help

[peak acorn]

The answer is you're supposed to hook up the pin to 5v

whatever way you do that is up to after you finish the schematic

[rancid nimbus]

Chip enable could be hooked up to a switch so you can enable and disable the output. The datasheet will tell you if it is active high or active low and the voltage tolerances. You will probably just hook that to 5v. Read the documentation to double check.

[bitter edge]

alr what do I do now

[rancid nimbus]

So yes 5v signal to enable.

[bitter edge]

uh what

[bitter edge]

this to that?

[rancid nimbus]

Yes

[bitter edge]

what now

ik that 5v has to be connected to smth

can't just pull 5v from the air

here's the connector usb

[rancid nimbus]

The output presumably goes to 3V3 goes to your USB chip if I understood correctly. Vbus and 5V need to be connected. An EE could state best practices.

[bitter edge]

EE?

Electrical Engineer?

[bitter edge]

I need the output for other things

like this and this

[rancid nimbus]

Yes

[bitter edge]

damn I thought you were one

[rancid nimbus]

your regulator takes in 5V right?

No, I just have built a board or two.

[bitter edge]

it can take up to 5.5

and outputs 3.3

[bitter edge]

what'd u build

[rancid nimbus]

I have previously built a board to represent an enigma machine and an electronic version of board game I play with friends.

[peak acorn]

o_O

[bitter edge]

that sounds like 100x more advanced then what I'm doing

why does usb 3.0 have to be difficult 😢

[peak acorn]

high speed communication complicated bestie

enigma machine emulating 1940s tech haha

[bitter edge]

this was all I had to do

for a usb 2.0 hub ;- ;

[peak acorn]

yuuup

[bitter edge]

then there's this fuckery

[peak acorn]

Whole lot of pins

[bitter edge]

16 to 65 ;- ;

[bitter edge]

connected

[rancid nimbus]

It was supposed to be an atmega, but... That proves too frustrating since I didn't get the serial right. I ended up using a separate board for logic.

[bitter edge]

somehow I figured out how to make a usb 2.0 hub

and I have no fucking clue how to make a usb led

[rancid nimbus]

USB led?

[bitter edge]

yeah

like lets say I wanted to add a led to the front of the usb

i have no fucking clue how I would add it

[rancid nimbus]

Add an LED and a resistor.

[bitter edge]

to what...

[rancid nimbus]

You have a resistor hooked up to vcc and the arrow side of the led schematic logo. The flat line is hooked to gnd.

[bitter edge]

seems like complication

[bitter edge]

anyway is the 3.3v ready to be used

bc now I gotta create the 1.1v ;- ;

[rancid nimbus]

I think the resistor should be about 100 ohm (a rating).

[bitter edge]

most schematics tell me the resistance I need well the good ones atleast

[rancid nimbus]

Vout needs to be hooked up to 3v3 and the other end needs to be hooked up.

[bitter edge]

Vout should be the 3v3 ;- ;

I'm trying to convert 5v to 3v3

[rancid nimbus]

As far as I know that should be it.

1v1 should be reasonably similar.

[bitter edge]

so now if I need to use the 3v3 rail I just use the VOUT

like this connects to VOUT

[rancid nimbus]

Vout goes to 3v3 yes.

[bitter edge]

alr

[bitter edge]

should I ignore auto route

it wants everything with gnd to be connected

[rancid nimbus]

I usually manually route the traces.

[bitter edge]

imma just ignore it

if it wants to be connected to gnd it can

time to design the most fucked up fuckery

[rancid nimbus]

Also, I would label the 3v3 net.

I just finished a board layout and will be reviewing it tomorrow and then order it. I will probably do a green PCB since that comes slightly faster. The board is for testing a new part layout on a much smaller board and testing the software to check if I need to alter the hardware any. On paper it looks like everything will just work.

[bitter edge]

for what

[rancid nimbus]

Keyboard.

I am prototyping the tightness on the keys and the pad layout. I think it should work, but last time I messed up the scale trying to follow the data sheet.

Different part.

[bitter edge]

Finished the upstream port 🎉
now time to do the fucking rest

[rancid nimbus]

Why does it look like both sides of the part on the top right are connected to the ground.

[bitter edge]

bc they are

[rancid nimbus]

Why?

[bitter edge]

idk it's in the schematic tho

[rancid nimbus]

What does that do?

[bitter edge]

idk

it's all gnd it's hooked up from the usb gnd to the board gnd

also easyeda doesn't have this fucking symbol

[rancid nimbus]

Gnd does not connect directly to the shield. Remove the dot to the upper left of C3.

Like the second schematic.

[bitter edge]

this is shield

[rancid nimbus]

No the other one.

[bitter edge]

oh wait does it connect to the C3

[rancid nimbus]

The four way.

That's my point.

[bitter edge]

so the wire goes straight ti the capacitator instead of the line

hmmm

it's still there

[rancid nimbus]

The two lines cross and not connect.

Delete the other part of that line and re-draw it to cross without the dot. Maybe you could select the red dot.

[bitter edge]

got it

[rancid nimbus]

There you go. Now you can fix the PCB.

[bitter edge]

what's wrong with it...

bruh nvm I remember

it was all gnd which it shouldn't be

[bitter edge]

this is better I think

[rancid nimbus]

You could maybe make it look better.

[bitter edge]

I mean I could

but then I might break smth because I use auto router

I think I should finish everything first then touch up the nets later

now to design power :))

after I create the 1.1v rail

[bitter edge]

also do you know when I should start putting components on the bottom

because most boards I've seen have components on both sides

[rancid nimbus]

I have not had a board that was populated that much before. My keyboard (macro pad currently) layout has almost everything on one side.

I might have to share a picture of it.

[bitter edge]

yes plz

[bitter edge]

also I'm going to have to add like 12 more caps

actually probably more

[bitter edge]

one more thing for now

When should I place vias fir uh via stitching

[rancid nimbus]

Interesting, I have not had to deal with that before.

[woeful rapids]

wanted to make a custom M.2 card but in order to get the docs for the specification you need to give them your dna sample

my tempmail is surely gonna get approved

i just need to know about the UART bus on the M.2 key E interface

[rancid nimbus]

M.2 had some public documentation somewhere. That sounds like an interesting project.

[woeful rapids]

yup found it

wikipedia reference number 19 on the M.2 page

https://web.archive.org/web/20140203000954/http://www.orvem.eu/attachments/article/130/M 2 introduction.pdf

[woeful rapids]

yup i'm making a custom GPS card that uses the UART bus of a key E interface, and has a female key E socket to plug in my laptop's ax200 card so that i can have both GPS and WI-Fi/BT on my laptop

since the ax200 uses PCIe for Wi-Fi and USB for BT, the UART bus is unconnected and i can use it for my own stuff

the key E interface is super fun because it has PCIe (but thats out of my league), but also easy stuff, like SDIO (SD card), UART, I2C, I2S and USB (and other stuff too)

as long as your board is well manufactured and designed, it should be super cool

and also like it can be embedded inside a laptop or something, which is insane for portability

[copper ravine]

It is unlikely you will need via stitching (used to reduce the capacitance and inductance between layers in a pcb). Bu you will likely want to have at least a ground plane on the other side and yeah you should have a few vias connecting the ground planes on both top and bottom layers together. You need to think about ground loops (and maybe current paths but likely not as much)

[bitter edge]

And I can't even make a USB hub

[woeful rapids]

i have never tried making an USB hub

too hard for me, it involves logic

UART is very simple and i don't need to touch anything, just wire it all up

definitely do check out the M.2 key E interface, it's really cool and you can make all kinds of neat devices

i just wanted GPS on my laptop because it's stupid why phones have good GPS and laptops don't

[woeful rapids]

i might have a thickness problem

[bitter edge]

I need you help uh finding a resistor with 25.5kohms with a 0402 package and it has to have a +5 tolerance

All the sites I've tried using only show 1+ tolerance and won't go higher

[woeful rapids]

the GPS module is 13.3mm thick and the PCB is 0.8mm as mandated by the M.2 spec, so 21.3mm, which is not small

[bitter edge]

That's a thick boi

[woeful rapids]

yeah i dont wanna mess with RF signals

[copper ravine]

the lower tolerance will be fine

[woeful rapids]

so i'm using this module, that has the antenna built-in
https://www.u-blox.com/en/product/sam-m10q-module

[copper ravine]

@woeful rapids how are you going to route the antenna out of the laptop?

[woeful rapids]

oh shit

oh oh shit the laptop is alluminum

[copper ravine]

yeah

[woeful rapids]

uhh yeah i need an external antenna for sure

[copper ravine]

it also needs a line of sight to the sky, so no windows = no worky well

[bitter edge]

Oh ok

[woeful rapids]

afaik my thinkpad had gps configuration option

it is plastic tho

[hollow basalt]

👍

[woeful rapids]

hmm well my plans went to shit

[copper ravine]

Sorry :/

[bitter edge]

I have an idea of what I want to do now

Make a pcie card with integrated wifi+Bluetooth

[woeful rapids]

Wi-Fi antennas are usually routed through the display assembly

[woeful rapids]

thats HARD

[bitter edge]

I'm making a USB hub

If it's any harder than that imma give up

[woeful rapids]

anything involving RF is inherently jankier

[bitter edge]

What's rf

[woeful rapids]

radio frequency

[bitter edge]

So that's worse than SS ; -;

[midnight wind]

?

[bitter edge]

?

[midnight wind]

that's definatly harder

[midnight wind]

what's SS

[bitter edge]

This is already hard ; -;

[midnight wind]

that's not that hard

it's mostly a matter of reading specs and designing to make it match specs

[bitter edge]

The USB super speed

[midnight wind]

ah, that's not even that bad

[bitter edge]

It is

[midnight wind]

it's really not...

[bitter edge]

It is

[midnight wind]

it's like some of the more basic projects

anyway if you are new to electronics, look at ben eater's videos

[bitter edge]

No that's USB 2 USB 3 is a nightmare

[woeful rapids]

yup they're great

[bitter edge]

I have a nice looking USB 2.0 hub but the 3.0 makes it 500x harder

[midnight wind]

oh 3.0, for some reason I thought SS was 2.0

[bitter edge]

No

USB 2 is so simple

[midnight wind]

but yeah wifi will defiantly be harder

[bitter edge]

Ik which is why I gave up

[bitter edge]

Not even 1/10th finished

[bitter edge]

Making some progress

[woeful rapids]

usb hub with the max number of ports

127 ports

ill make an M.2 key E breakout board to test around

[bitter edge]

What is this knowledge for

[woeful rapids]

usb

any revision

[bitter edge]

Also what fucking chip sports that many usbs

[woeful rapids]

none but you can plug a hub in another hub

and also it should be possible to make a chip like that

[bitter edge]

No it shouldn't

It just has to be BIG

And need a lot of external power

[woeful rapids]

a sata power cable should do it

[bitter edge]

It's just going to have one hell of a time wiring every single thing

Also I am gonna declare myself 3/5ths finished

[woeful rapids]

super nice

[bitter edge]

Probably gonna edit the board design to look like a normal USB hub

Instead of the square one

[bitter edge]

@copper ravine if I used a USB c make to USB female connectors would I need resistors in between the

[copper ravine]

Not sure I'm understanding your question

[bitter edge]

Like a pcb with a male USB c to a female USB a

Would I just wire it up or does it need any resistors

[copper ravine]

So and upstream port hard-wired to a downstream port? Yes, it would still need the resistors on the appropriate lines.

[bitter edge]

Also yk how the ti uses USB b connectors

Why can't I just use a USB a

[copper ravine]

For upstream? You need to use the correct connector for upstream connections. SO for USB-C it is the same, for USBA/B, you need to use USB-B for upstream, USB-A for downstream. It's part of the USB physical/electrical layer spec

[bitter edge]

Then how come there are USB hubs with USB a DS and USB c US

[copper ravine]

that's ok; USB-C can be both up and down stream as per the spec

[bitter edge]

Oh but it can't be USB a and a

[copper ravine]

Correct

[bitter edge]

Then how come there are hubs that have that

[copper ravine]

Can you link one? I've not seen any that are USB A upstream

[bitter edge]

What really?

[copper ravine]

Yes

[copper ravine]

no no, that's not the same thing

there is no upstream "connector"... there is a cable which yes, has a USB-A connector on it

We are talking about connectors in devices, not plugs on cables

This is a fundamental part of the USB spec, you really should be familiar with it.

I guess you could design the upstream connection to be a cable with a USB-A plug on it, but again, that doesn't make it any easier (it's actually more difficult to properly attach a cable to PCB such that the connection doesn't get destroyed over time due to stress and movement)

[bitter edge]

I am not I just decided one day to make a USB hub

sigh
still not done

[peak acorn]

gonna build some once u design it?

[bitter edge]

nooooooooooooooooooo that's why I'm designing ut

[past owl]

What is that big ic

[bitter edge]

have you not seen anything of what I've been doing...

[past owl]

nope I just joined the server :)

[bitter edge]

the message states what I'm using..

[past owl]

Why are you making a usb hub

[past owl]

why

[bitter edge]

I literally also answered that bruh

[past owl]

I can’t read smh

[bitter edge]

I am also shaking ur head

next time I will blow it up

[peak acorn]

u dont need to design smth to actually make it

[bitter edge]

yes I do

because I'm stupid and I need to do things step by step

and I need the instructions right in-front of my face

[rancid nimbus]

@bitter edge ^^^

[bitter edge]

bruh that seems so easy

[rancid nimbus]

Yea that is, but I also only wanted to implement something easy and check that the switches fit the way I expect them to fit.

I will eventually build an rp2040 board.

[bitter edge]

;- ;- ;- ; -; -; ; - ; - ;-; - ; -;-;- ; -; -; -;- -;-; -;-;-;

[bitter edge]

what's it gonna do

bruh wtf 647 pages of dics

docs*

[rancid nimbus]

The soldering for the board above will be interesting.

It is going to be a keyboard. I am planning to make a 1800 layout keyboard.

Probably a compact 1800

Maybe i might a 40% for a friend.

[bitter edge]

I will take a 9 key keyboard

with cherry red switches

[rancid nimbus]

A 9 key keyboard?

[bitter edge]

like a numpad

except it isn't a numpad and it's programable

D e s i g n i n g

[rancid nimbus]

At least there is documentation.

[bitter edge]

;- ;

it has like 54 pins and my ti chip has 65 with less docs

can auto route handle it I bet not

i was right it cannot handle it

[rancid nimbus]

Just route the path yourself.

[bitter edge]

hell no

there's to many components to do that

i'm just gonna move them around till auto router finds a way

[midnight wind]

It's honestly not that bad

[bitter edge]

for me it is

[rancid nimbus]

I placed all those traces on my PCB without an auto router.

[bitter edge]

u have simple traces

I have a nightmare if things connecting to things

[rancid nimbus]

Look at the pine phone PCB layout. That probably was done without an auto router.

[bitter edge]

imma die

[rancid nimbus]

That is probably 4 layer...

I think that might be via stitching on the edge or gold edges...

And I don't see the cell modem, so there is a whole other side.

[bitter edge]

how tf do led strips work is it one giant bendable pcb

[storm berry]

ye they're flexible pcbs

[rancid nimbus]

https://docs.oshpark.com/services/flex/

[bitter edge]

@copper ravine Does this look good so far

the only thing I haven't add is the 1.1v thing, the clock, a few resistors for R1, and this thing

[copper ravine]

I'll have to take time later to look at it

[bitter edge]

oh ok

[rancid nimbus]

Where 3v3 and 1v1?

Ah no 1v1.

[simple hound]

Hi there,
I am currently working on a similar project, what software are you planing to use?

[bitter edge]

i'm already uding software ;-; so why would I plan to use another ;- ;

[simple hound]

*what software are you using then?

[bitter edge]

what are u making

[rancid nimbus]

For board design I use KiCAD.

You can find easier software or more advanced software.

There is easyeda if you want an online webpage board layout and schematic software.

[bitter edge]

but they don't have chassis ground for some reason

[rancid nimbus]

They probably allow you to make your own logo for a custom net.

[bitter edge]

I mean doesn't it need the net or does it just know to go to gnd

[simple bolt]

I’m trying to learn front end web development any book recommendations for learning or other resources

[bitter edge]

w3schools

[bitter edge]

also can I use uh netflags instead of routing things

or would I still have to automatically route it

[storm berry]

doesn't this only connect them logically?

[bitter edge]

idk that's why I'm asking bruh

[rancid nimbus]

Yes

[storm berry]

you will still need a wire going from one to the other

[bitter edge]

damn

[rancid nimbus]

Not necessarily a wire in the schematic, but maybe.

[bitter edge]

back to this

[storm berry]

you can use netflags to replace this, but the physical pcb will still need a wire connecting them

[bitter edge]

yeah no thx

[bitter edge]

alr what does this mean VDD11

[bitter edge]

@copper ravine Should everything that's connected to gnd be routed together

[storm berry]

yes

[storm berry]

usually you'd use a ground plane for that

like a copper fill that covers the whole board and is attached to gnd

[bitter edge]

even if i do that it still wants to be together

[storm berry]

I think that's because the two components in the triangle shaped area are not connected to the main ground fill

it's an island

[bitter edge]

I mean I filled it with gnd and it didn't want to be there

but I can assure u everything has gnd

[storm berry]

like the triangle/pentagon shape to the bottom left of the ic

that's an island that isn't connected to the other gnd fill which is why those two smd components still want to be connected

[bitter edge]

it seems connected

[bitter edge]

ohh

[bitter edge]

could this be fixed if I uh via stich it to the bottom and fill the bottom with the gnd plane

[storm berry]

ye

or just have a trace from the bottom that connects to the other island

[bitter edge]

bruh it didn't fill

[storm berry]

idk what the best choice is here

[storm berry]

you might have to tell it to compute the fill

[bitter edge]

uh so how exactly should I via stich

[rancid nimbus]

Add vias to pass the gnd to the bottom layer and back up on the other side.

[bitter edge]

i mean if you add a via on the top side won't it just be at the bottom

[rancid nimbus]

I work at the department of redundancy department. Yes that is how a via works.

[bitter edge]

oh srry I read this like I needed to put some on the bottom and the top

[storm berry]

also you haven't connected the gnd's on your usb connector

[bitter edge]

i'm not finished yet

what I have : vs : what I need

[storm berry]

you should probably finish this step before going to physically lay it out

[bitter edge]

i just like to see what It will look like

[rancid nimbus]

On the other side of the traces that are blocking it from connecting to ground.

What does gnd_drain connect to?

[copper ravine]

@storm berry sounds like you've done this before ;) @bitter edge And yes you need to make sure all ground nets are connected during the PCB routing process. You can get "islands" or areas that are supposed to be connected but get disconnected by other traces during the routing process. It is not uncommon. This is why you need the schematic; it allows the PCB checker to verify that all traces are properly routed and all signals are connected properly.

[bitter edge]

Uh gnd

[bitter edge]

So auto router should just do it's thing

[copper ravine]

No, the auto router will likely fail to route for any reasonably complicated design

Also you need to tell it about all the design constraints, like impedance controlled signals, trace spacing, etc etc.

[bitter edge]

I can edit it afterwards

[copper ravine]

sure

[bitter edge]

does this look good

[nocturne galleon]

honestly id just use a regular gnd for everything
no real reason to have them seperate

[bitter edge]

i mean it says it wants chassis gnd

[nocturne galleon]

ground is ground

your device is usb connected lol it's going to be the same ground at the end of the day and that's one less net

[nocturne galleon]

in 99% of cases it is

[rancid nimbus]

How long should it take gdb to launch?

[bitter edge]

what's that\

[midnight wind]

debugger

[rancid nimbus]

It has been more than 32 minutes on a 24 mhz processor.

[bitter edge]

does anyone know the pinout of the Molex 47053-1000

[rancid nimbus]

The fan one or some power related one?

https://ibex.tech/wp-content/uploads/sites/3/pc_fan_4_pinout.png

That is what I found from Google.

[bitter edge]

yeah I wanna make a usb to that

so Ig I'll only need the 1 and 2 pins

[bitter edge]

do u know if I'll need a resistor

[rancid nimbus]

Well, that connector should be 12v so you would need a boost converter to get there and USB might not supply what you want in terms of amperage. If you go USB type c and connect it to a device capable of it you could get 12 v out.

[bitter edge]

so I need a booster and that's about it?

[rancid nimbus]

And something to control the pwm of a fan header. Maybe something to read the sense line.

[bitter edge]

I just wanna plug a fan into a usb I don't really care about how fast it spins

[rancid nimbus]

So no speed then?

[bitter edge]

how come I need smth to control the speed of it

Because I use a usb to cable to fan and it still worked ;- ;

[rancid nimbus]

DC controlled fan maybe...

[bitter edge]

I think this is not the correct way to hook up the gnd

[rancid nimbus]

Again you have to do something with the on/off pin. If you don't pull it up or down and did not read the data sheet it will do the opposite of what you want.

[bitter edge]

there was no datasheet

[rancid nimbus]

https://www.ti.com/lit/gpn/TL2575HV-12

[bitter edge]

so uh what should I put there

for me it seems like it wants to go into Vin

[rancid nimbus]

Step-Down Switching Voltage Regulators

Look at the recommended vin for the 12 v variant.

It stated 15 < vin < 40

[rancid nimbus]

Page 11 has a sample schematic.

Also that voltage range is for the series of chips.

Sorry the typical application is page 13.

It is labeled step down. You want step up.

[bitter edge]

ah

[rancid nimbus]

You have 5v and want 12v

You could also just use USB type C and have a voltage negotiation chip that requests 12v.

Also you could just under volt the fan and hope nothing bad happens. The worst I can think about now is an early death of the fan.

[bitter edge]

or... it just spins slower

imma just do smth easier

I don't think I can fuck this up

[bitter edge]

@rancid nimbus for the uh C_0402 do I just not place anything there

[rancid nimbus]

If it says leave it alone then leave it alone.

[bitter edge]

but should I still have the gnd

it says nothing other than to not mount the capacitator

[rancid nimbus]

Have it on PCB and just to not put it on there unless you need to.

[peak acorn]

Determine whether or not two quadtrees with arbitrary root and edge order are identical or not?

[rancid nimbus]

Are they the same pointer?

More realistically you want the same constance. Just unravel both and check every index.

[peak acorn]

No

So my problem has changed to something much easier

The edge order will be the same, but the thing is that the nodes are not named, or equivalent in memory pointer or anything like that

two separate data structures where the only thing that matters is the number of connections basically

So anyways I don't need to solve that overly complicated issue

[bitter edge]

@copper ravine how would I make a audio jack to usb

[copper ravine]

oie, that's much more complicated. You need to create a USB Audio device, which requires understanding how to either use a chip designed for that purpose (I don't know of any) or using a microcontroller with a DAC and an audio amplifier.

[rancid nimbus]

Sounds fun.

[bitter edge]

you're extremally right that sounds complicated

[bitter edge]

will the rest of this work

[rancid nimbus]

https://www.ti.com/audio-ic/converters/usb/products.html#p1020=2

[bitter edge]

oh wow ti has a thing for everything

[rancid nimbus]

Maybe a pointer...

[peak acorn]

point

[bitter edge]

but it's supposed to be a small thing not a big thing with 10s if resistors and caps

[bitter edge]

they only supposed usb 1.1

[rancid nimbus]

https://www.ti.com/lit/gpn/pcm2903c
Page 24

A CD has 1.4 Mbps and USB 1.1 has 12Mbps.

You don't need USB 2.0 or 3.0 unless you are going for super high bitrate audio in which case you would spend lots of time on the audio amplification and power cleaning.

[bitter edge]

I mean I was kinda goin for USB 2 bc uh literally every other connector is connected to that

[bitter edge]

This

[rancid nimbus]

USB is backwards compatible.

[bitter edge]

Ok that solves everything

[ornate summit]

I'm wondering if anyone here knows much about QT?

I want to make a tree that shows a list of roots that may or may not have children.

java.lang.NullPointerException: Cannot invoke "io.qt.core.QModelIndex.child(int, int)" because "parent" is null

I am clearly doing something very wrong here.

[lament bridge]

Anyone here made an VSCode extension before?

How such a popup can be made?

basically it shows the syntax and some notes

[supple hull]

I think our contractor thinks I'm bicycle helment. I did a quick fix on a project and I didn't push it to bit bucket as I was in a rush, so it went to the end point he noticed then explained to me where to push to. MOTHERFUCKER I SET UP THE BIT BUCKET REPO AND GAVE YOU ACCESS.

[vestal spire]

I'm trying to deploy a python Flask project to vercel and I'm getting this error. Any help?

[bitter edge]

here u go

https://code.visualstudio.com/api/language-extensions/programmatic-language-features

[old nimbus]

Anyone here wanna help a college student out with some really simple Javascript? 😆

[hollow basalt]

No

[old nimbus]

fair enough

would be grateful to anyone else though

[nocturne galleon]

Just ask whatever you want to ask and someone may answer :3

[old nimbus]

Trying to create pong for a class using jquery and I have made the ball bounce, the sliders and have got everything nearly working but can't seem to get the ball to interact with the sliders at all

[young elbow]

hmm I don't see the collisionDetection function in it or anything related to collision, is it an old version of your code?
A couple of advices:

1. Too much comments is like not enough. Don't point the obvious, example:
   line 86 ->

      // Move the player according to its velocity in the two dimensions:
      playerX += playerVelocityX;
      playerY += playerVelocityY;

This does not add anything that the code doesn't already say with your variables names

2. When you seek help, before sending code, fix your indentation.
   Indentation is very important for a reader so we can visually understand where we are in the code.

3. Try as much as possible to be explicit with your variables' names (aka don't use abbreviations).
   I know that math makes us use single letter variables but when we code, writing height instead of h doesn't cost anything and makes it easier to read.
   Readability > speed of writing.

If you want more feedback or you have an up to date version, you can send it to me in private message. 😛

[bitter edge]

try getting open ai to do that for you

[twilit beacon]

this would be something```js
// Set up the canvas and its context
const canvas = document.getElementById('canvas');
const context = canvas.getContext('2d');

// Set up the ball properties
let ballX = canvas.width / 2;
let ballY = canvas.height / 2;
let ballVelocityX = 5;
let ballVelocityY = 5;
let ballRadius = 10;

// Set up the player paddles
const paddleWidth = 10;
const paddleHeight = 100;
const player1PaddleX = 0;
const player2PaddleX = canvas.width - paddleWidth;
let player1PaddleY = canvas.height / 2 - paddleHeight / 2;
let player2PaddleY = canvas.height / 2 - paddleHeight / 2;

// Set up the keyboard input handlers
const keyDownHandler = (event) => {
if (event.key === 'w') {
player1PaddleY -= 5;
} else if (event.key === 's') {
player1PaddleY += 5;
} else if (event.key === 'ArrowUp') {
player2PaddleY -= 5;
} else if (event.key === 'ArrowDown') {
player2PaddleY += 5;
}
};

document.addEventListener('keydown', keyDownHandler);

// Set up the game loop
const gameLoop = () => {
// Clear the canvas
context.clearRect(0, 0, canvas.width, canvas.height);

// Draw the ball
context.beginPath();
context.arc(ballX, ballY, ballRadius, 0, Math.PI * 2);
context.fillStyle = 'black';
context.fill();
context.closePath();

// Draw the player paddles
context.fillStyle = 'black';
context.fillRect(player1PaddleX, player1PaddleY, paddleWidth, paddleHeight);
context.fillRect(player2PaddleX, player2PaddleY, paddleWidth, paddleHeight);

// Move the ball
ballX += ballVelocityX;
ballY += ballVelocityY;

// Check for ball collisions with the paddles or walls
if (ballX + ballVelocityX > canvas.width - ballRadius || ballX + ballVelocityX < ballRadius) {
ballVelocityX = -ballVelocityX;
}
if (ballY + ballVelocityY > canvas.height - ballRadius || ballY + ballVelocityY < ballRadius) {
ballVelocityY = -ballVelocityY;
}

// Check for ball collisions with the paddles
if (ballX + ballVelocityX > player2PaddleX && ballX + ballVelocityX < player2PaddleX + paddleWidth && ballY + ballVelocityY > player2PaddleY && ballY + ballVelocityY < player2PaddleY + paddleHeight) {
ballVelocityX = -ballVelocityX;
}
if (ballX + ballVelocityX < player1PaddleX + paddleWidth && ballX + ballVelocityX > player1P
// Check for ball collisions with the paddles
if (ballX + ballVelocityX > player2PaddleX && ballX + ballVelocityX < player2PaddleX + paddleWidth && ballY + ballVelocityY > player2PaddleY && ballY + ballVelocityY < player2PaddleY + paddleHeight) {
ballVelocityX = -ballVelocityX;
}
if (ballX + ballVelocityX < player1PaddleX + paddleWidth && ballX + ballVelocityX > player1PaddleX && ballY + ballVelocityY > player1PaddleY && ballY + ballVelocityY < player1PaddleY + paddleHeight) {
ballVelocityX = -ballVelocityX;
}

// Call the game loop again
requestAnimationFrame(gameLoop);
};

// Start the game loop
requestAnimationFrame(gameLoop);

(made by ai, should i add)

[hollow basalt]

yes

[twilit beacon]

can anyone run this? idk if it works and idk how to run js

[hollow basalt]

no

[twilit beacon]

ok

is this supposed to be complete with html and css or is it standalone

[hollow basalt]

that's standalone

try running it in your oven

[twilit beacon]

oven

why do they even call it oven when you out of in hot eat the food

[nocturne galleon]

a classic

[rancid nimbus]

For the num pad I designed, the PCB quality is good and the part spacing is fine with the major problem being the spacing of the connections to the dev board. I will do another rev with more of a fuller design just with a bigger connector so I can solder my dev board directly to it. I also learned that soldering tiny diodes with an iron and tweezers takes lots of time.

[abstract fog]

If I wanna start coding in some way, where should I start? I’m kinda interested in it, and if I really need a job I could add coding into that to make the list of possible jobs higher

And coding pays pretty good I believe, I think my dad is making close to 90k a year with his job where he does coding for oil rigs (hopefully that doesn’t come across as flexing or anything), so I would be interested in it

[humble mirage]

have you asked him

you could start by sitting down with a linux install and the legendary book "the c programming language" and learn like that, 80s-style

[abstract fog]

I could possibly ask him

I mean he does have like over 15-20 years of experience so he would probably, I could ask him next weekend or something tbh

[abstract fog]

I do happen to have a Linux vm, so if I can find the book somewhere than I might start doing that over the weekends or something

[humble mirage]

i mean that's just if you wanna do things your dad's way lol

[abstract fog]

Either way should work fine tbh

[humble mirage]

there's like a ton of courses and books and stuff out there, the possibilities are endless

[abstract fog]

If he happens to have the book I might could use it, than I shouldn’t need to pay for anything

Which he might would have that book, I have no idea tho

I mean looking it up that book and I see some pdfs of questionable legality

Definitely questionable legally wise

It seems like the entire book

[twilit beacon]

do you guys recon i could maje a primitive raytracer by using brensehams algorithm? i already made it into an algorithm for 3d (since its originally for 2d) but is there any better way?

so i could calculate every ray

and boom ray tracer

[rancid nimbus]

I don't see how a line drawing algorithm will help make a ray tracer algorithm. Maybe you could use it with something else to determine if a line crosses a path with an object in a 3d space...

[peak acorn]

Can anyone tell me what these periods mean? Are they just multiplication?

[twilit beacon]

ill look into it further but as of now it was all i could think of

[arctic tusk]

have you tried openai chat bot for you collage homework/lab solutions? LOL

[silk eagle]

but then you dont learn

[arctic tusk]

PBKDF2, Argon2, or bcrypt?

[arctic tusk]

yeah lol

[rancid nimbus]

You could look up those formulas and see how the formula is formatted. Maybe there will be an explanation there.

[umbral saffron]

ignoring software, how would i physically put this together, specifically the part on the left with the laser diode and the conjunction

[rancid nimbus]

Your beam splitter looks like it is facing the wrong way.

Beats me, I have not felt with lasers before.

I am guessing you 3d print something if the Lazer stays cool enough.

[bitter edge]

minecraft

[bitter edge]

but u can remember

unless u don't read the shit

[silk eagle]

memory better for things u did yourself

[bitter edge]

u can still learn smth atleast

[arctic tusk]

how though of using photodiodes?

[coral zenith]

Question what do u use c++ and JavaScript for?

[bright geode]

Both are general-purpose languages, but Javascript is most commonly used in web development, while C++ is typically a "systems" language (OS, drivers, implementation of other languages, anything that requires high-performance low-level native compiled code)

A common example of where you would see them used together in the same project would be (but certainly not limited to) a Javascript front-end as part of a webapp GUI (what the user interacts with) which communicates with a C++ back-end (the thing that does most of the computation / storage /... ).

[humble mirage]

JS is general purpose and usually isn't the wrong thing to choose
C++ you should only use if you absolutely have to, since it takes a lot more knowledge to use, being a very complex and badly standardized language with a hard to use ecosystem

[keen hound]

C++ for essentially any computer program

JavaScript for websites

[hollow basalt]

Javascript for essentially any computer program

C++ for systems

[keen hound]

system programming refers to writing programs like OSes and drivers

C++ is very rarely used for that, in 90% of cases C is used

most computer programs are written in C++ (game engines, internet browsers, etc)

[umbral saffron]

they’re photoresistors to measure the split light from the beam splitter and laser

[umbral saffron]

i have not thought about either of those thank you

[ember sapphire]

Both languages (c++ and js) should be avoided these days.

Js lack’s pretty much any safely guarantees offered by even c when when it comes to type safety. It’s also easy to write slow code in it, and even when you “optimize it” it’s still generally a few times slower then what you could do in something like c or rust. That is before even getting into compiler intrinsics.

There are other subjective takes like it’s lack of a matures and consolidated ecosystem like rust and go that also applies to c++ as well.

For c++, to quote it’s creator, “C makes it easy to shoot yourself in the foot; C++ makes it harder, but when you do it blows your whole leg off.”.

About JS being needed for web, it’s not really anymore. WASM can pretty much replace it in its entirety

C++ is much better now, however you can still do the getto things that have to still be supported as well as accepting other people might do it as well. In the argument of using rust (and some others I’m not 100% on board with it but this is valid) it can’t do as many compile time checks and or takes far longer to test with something like valgrind.

I’m not saying you shouldn’t use it, but it should be avoided unless you need the performance gains from it or you really know what you are doing

I would never call c++ (or any) the best language. Nor is js being the current foundation of the web a valid reason to keep using it or endorse it at all

And about the argument of using TS as a wrapper for js for type safety. It has bugs and quite a few of them that breaks it. It’s also annoying.

It is the definition of bad

https://youtu.be/sRWE5tnaxlI

[ember sapphire]

Also doesn’t anyone find it weird how strange and insecure c handles strings in the standard library?

[peak acorn]

Yeah it is pretty bad, always gotta be super careful

[hollow basalt]

It’s not. It’s just giving the programmer all the tools needed including shooting ones foot if wanted

[cursive root]

TIL C++ and JS are the only programming languages in existence 🤣

[ember sapphire]

What’s this rust and go you speak of

[humble mirage]

isn't java still weirdly high on the TIOBE index

[ember sapphire]

Yeah but it’s on a decline

[worthy bone]

just use typescript lol

[ember sapphire]

Just use c lol

[nocturne galleon]

can anybody recommend touchscreen compatible controll panel program or smthng

[cursive root]

none of these discussions make sense without any context. No one's gonna use C to build web stuff, use Python if they need particularly high performance or use Javascript... well, ever, hopefully. Unfortunately there aren't a lot of alternatives if you wanna do stuff on the browser, so there you go

[rancid nimbus]

Web assembly, but... You still need JavaScript.

[cursive root]

what would you use instead? I mean, assuming you wanted to do something on the browser for JS and assuming you need high performance computing or just wanna go low level for C++

[ember sapphire]

Our last two comments were shitposts

[rancid nimbus]

Touch screen control program for what?

[nocturne galleon]

for a touch screen monitor to controll basicly everything

[rancid nimbus]

Everything?

[hollow basalt]

Everything?

I don’t think a touch screen control can control toilet seats

[nocturne galleon]

yeah... volume, displays, shows, midi, lights, recording, nuclear launch codes

[ember sapphire]

Rust for high performance systems and go for WASM is nice, however both have a lot of alternatives these days.

[nocturne galleon]

and etc

[ember sapphire]

I thought WASM could finally edit the dom?

[rancid nimbus]

I don't know if that exists. A Facebook what's it called or Amazon what's it called is probably what you might want to look in to.

[nocturne galleon]

im pretty sure you can servo + relay + pi

[rancid nimbus]

I don't know.

[cursive root]

oh interesting, I had heard about that but had completely forgotten it existed.

[ember sapphire]

Yeah it’s pretty good, you can run a win95 vm in the bowser with it

There is a whole project to get a Linux environment running

[cursive root]

ah nice, I saw those languages go up the list in the StackOverflow surveys throughout the years, though I've never tried them out

[cursive root]

woah 🤯

[ember sapphire]

WASM is a compile target so you can literally use anything for it, even js.

Hopefully WASM will replace js as soon as it can edit the dom or even before that as there is literally no reason not to besides maybe slightly slower load times for websites

That is however compensated by being 2-10s of times faster when loaded

Windows 2000 in the browser using WASM https://bellard.org/jslinux/vm.html?url=https://bellard.org/jslinux/win2k.cfg&mem=192&graphic=1&w=1024&h=768

[rancid nimbus]

https://wasm.continuation-labs.com/d3demo/

Web assembly Doom 3.

[ember sapphire]

Google is a piece of shit and decided that jpegxl wasn’t good enough for them and removed it from chromium. You can however just ship your own super light decoder in WASM and use that instead for massive bandwidth savings as well as properly supporting HDR.

You can literally do anything with it

[old nimbus]

can someone explain why this is not working in javascript?

function victory(){
let end = 0;
let start = 0;
if ((playerScore = 10) && (botScore = 10)){

let start = Date.now();

if (playerScore < 10){

let end = Date.now();

console.log (Execution time: ${end - start} ms)

[peak acorn]

You need to use == for equality comparisons

That's at least one issue, first I noticed

[peak acorn]

Also it looks like you aren't ending your function or if statement with }}

[old nimbus]

that's just discord not playing nice with those bits

[midnight wind]

Use code blocks

To preserve formatting

[rancid nimbus]

So going off of what was already stated, you end up setting a variable in the if statement and it enters that is statement. Then it does the other if statement and returns false so it doesn't get the end time. Then the console log would out something like undefined - 100 and that returns probably undefined I don't know JS so I could be wrong but that is what I see. Also not ending the functions with curly brackets doesn't help. Look at this for hot to share code on discord. It does syntax highlighting if you do it correctly. https://support.discord.com/hc/en-us/articles/210298617-Markdown-Text-101-Chat-Formatting-Bold-Italic-Underline-

[old nimbus]

function victory(){
    let start = 0
    let end = 0
    if ((playerScore == 10) && (botScore == 10)){
      start == performance.now();
      
    }
    if (playerScore < 10){
      
       end == performance.now();
       console.log(`Execution time: ${end - start} ms`);
      
    }
  }```

thx

see my problem is that I can't figure out to have the function end properly

because its for a pong game and a requirement is to have the highscore as the fastest time but i can't get the timer to work

so when the points go down to 0 it should post a time

[rancid nimbus]

You are missing a return statement, but js ignores that. You are missing semicolons on your lat statement, but js allows for that. You are missing a definition for playerScore and botScore, but js then will use a global variable (not good practice, but oh well).

[old nimbus]

playerscore and botscore are further up the code

if someone wants the full file and sift through it to see where ive fucked up

I would worship you

[ember sapphire]

btw after the first 3 graves add js for syntax highlighting, like this.

let test = 12;

[old nimbus]

javascript

[old nimbus]

thx

[ember sapphire]

make it on the same line

[old nimbus]

fixed

sorry im so noobish at coding its childish

but this is worth 90% of my grade so im pretty desperate

[hollow basalt]

Ok

[peak acorn]

Does calculating a matrix determinant have a really bad time complexity?

[ember sapphire]

As the size of your matrix increases yeah it’s really bad. For smaller ones it’s fairly quick tho

[peak acorn]

Hm

Yeah trying to turn a 1x1x2 cuboid into a graph representing where faces are connected and using that to run a formula that required a derivative, just doesnt solve

1x1x2 solves immediately (10 nodes) but 1x2x2 (16) doesnt finish

[mossy turret]

Hey all, before I post/communicate here, does Web Design/Development (Using WordPress) count as #development? Thanks in advance ❤

[peak acorn]

yea

[hollow basalt]

yea

[twilit beacon]

yea

[young elbow]

yea

[ember sapphire]

yea

[silk eagle]

yea

[lone vault]

Yea

[peak acorn]

mobile user spotted

[hollow basalt]

yea

[bitter edge]

yea

[twin remnant]

yea

[mental lynx]

yea

[umbral saffron]

so i got everything figured out except i’m curious if the laser diode directly connects to the top photoresistor, but im not sure why that’d be the case

[hot briar]

Sorry if I shouldn't be asking here, but I'm desperate... Anyone here know Java and can help me with a simple coding issue?

[coarse comet]

Don't ask to ask, just ask

[hot briar]

I need to do 3 things with a string

• Check that it's 3 characters long (easy, no issues here)

• Check that the first 2 characters of the string make a number from '01' to '99'

• Check that the last character of the string is either 'A', 'B' or 'C'.

I need to do all of this in a single method, returning true if all the conditions above are met, and false if not.

I know I need to use charAt, but I just can't work it out. Can someone please help me?

I know it's probably simple, but my brain is fried, I've been up for 30 hours, and I'm losing the will to go on!

[coarse comet]

Do you know how to get the last character?

[hot briar]

I think so? Just a simple string.charAt(2) == 'A' || string.charAt == 'B' etc etc

But not sure

[coarse comet]

string.charAt(2) won't always get you the last character tho, any idea how to always get the last character for a string of any length?

[hot briar]

create a variable and store its value as string.length() and use that. So int position = string.length()
then string.charAt(position - 1)
?

[coarse comet]

Yeah!

[hot briar]

But I'm assuming if my first 'if' condition checks the length of the string is 3, then I may not need that?
It's the check that the first 2 characters in the string are numbers that fall between '01' and '99' that's really stumping me

[coarse comet]

Of yeah, you're right

So you're checking if the string is like 36E, right?

[hot briar]

Yep. specifically "36A" for example

last character must be A B or C

First 2 characters a number between 01 and 99

[coarse comet]

You can take a substring of the first two characters and check that

[hot briar]

Would you mind giving more info? Haven't come across substrings yet

Thanks for the help BTW

[coarse comet]

You can call .substring() to get a sub string (damn) specifying the start and end index

So like .substring(0,2) to get the first 2 characters of the string

And then you just need to check if they are a number, really

[hot briar]

Would I then need to convert to integers to check that they are numbers?

[coarse comet]

Yea but if they are not numbers you'll get an exception so you'll want to catch it

Not sure if there is a better way to check that

[hot briar]

I'll take a look and see what I can come up with. Still not feeling in any way sure. This assignment is really killing my drive, I hate it!

[coarse comet]

Or I guess you could do if (Character.isDigit(ss.charAt(0)) && Character.isDigit(ss.charAt(1))) in this case

[hot briar]

For all digits 0-9? Is that an acceptable thing to do in Java? Have such a long 'if' condition, I mean?

[coarse comet]

This just checks if the first character is a digit and if the second character is a digit, if they are that's a valid number

oh wait I'm dumb

[hot briar]

Ah I see. But I also have to exclude '00' as a possibility

[coarse comet]

Yea you can just check if the substring isn't 00 or convert it to an int and check if it's not 0

[hot briar]

Can I store the first character as an integer variable? With something like 'int firstChar = string.charAt(0);'

[coarse comet]

Well yes but then it stores the ascii value of the character

[hot briar]

Ah, so use .isDigit and also != 0

[coarse comet]

Is this an assignment for school?

[hot briar]

Second year of distance comp sci degree

[coarse comet]

If you are allowed to use try catch then that is (imo) the best way

[hot briar]

I'll have a look into it. catch is new to me though

[coarse comet]

https://stackoverflow.com/a/1102916

If you use try catch you can easily return false if it's not a number and if it is, it's already an int so it's easy to check if it's between 01 and 99

[hot briar]

That looks like it's going to be helpful, thank you!

[hot briar]

{
if(number.length() != 3) {
return false;
}
else {
if(number.charAt(0) < 48 || number.charAt(0) > 57) {
return false;
}
else {
if(number.charAt(1) < 48 || number.charAt(1) > 57) {
return false;
}
else {
if(number.charAt(2) < 65 || number.charAt(2) > 67) {
return false;
}
else {
if(number.charAt(0) == 48 && number.charAt(1) == 48) {
return false;
}
else {
return true;
}
}
}
}
}
}
}

@coarse comet I think I did it?!

[coarse comet]

Send it as

```java
// code here
```

gimme a sec

[hot briar]

{
        if(number.length() != 3) {
            return false;
        }
        else {
            if(number.charAt(0) < 48 || number.charAt(0) > 57) {
                return false;
            }
            else {
                if(number.charAt(1) < 48 || number.charAt(1) > 57) {
                    return false;
                }
                else {
                    if(number.charAt(2) < 65 || number.charAt(2) > 67) {
                        return false;
                    }
                    else {
                        if(number.charAt(0) == 48 && number.charAt(1) == 48) {
                            return false;
                        }
                        else {
                            return true;
                        }
                    }
                }
            }
        }
    }
}

So what was screwing me up, I think, was not just checking the char using the ascii numbers

[coarse comet]

Cool!

            if(number.length() != 3) {
                return false;
            }
            
            if(number.charAt(0) < 48 || number.charAt(0) > 57) {
                return false;
            }
            if(number.charAt(1) < 48 || number.charAt(1) > 57) {
                return false;
            }
            if(number.charAt(2) < 65 || number.charAt(2) > 67) {
                return false;
            }
            if(number.charAt(0) == 48 && number.charAt(1) == 48) {
                return false;
            }
            
            return true;

makes it more readable

if you are checking for something and then returning, you don't need an else since that code will never run anyway

[hot briar]

It does! The chat really helped me order my thoughts. Thanks a lot for that, I really appreciate it

[coarse comet]

Np, have fun!

[grizzled steeple]

I might also externalise the recurring range check into a separate function to clean up the code a bit more 🙂

[hot briar]

That's not a bad idea. If I get any time before this is due I'll definitely try

Man, this is killing me! It's my first java assignment, I'm waaaay behind, my wife has just had ACL and knee reconstruction surgery, and I've been sick. It's like the universe doesn't want me to pass this course. Studying distance can really suck. I just wish I had a tutor next to me sometimes to ask questions.

Anyway, I've really appreciated the help on here today. It's brightened my spirits a bit. Thanks

[coarse comet]

Google is your best friend

[hot briar]

I've maxed out my 16GB ram for the first time ever with all my chrome tabs 😆

[coarse comet]

Heard of Firefox?

[grizzled steeple]

The problem isn't the browser, the problem are the Websites (and the extremely bloated ECMA specifications)

[hot briar]

Ha! Yeah I think I, and many others, will be switching over very soon. Can't be doing with ad blockers not working any more

[coarse comet]

Oh you're right

[grizzled steeple]

The Adblocker in Brave (a Chromium based Browser) will continue to work fully even with Manifest V3, as it isn't actually a plugin, but what makes me switch to FF soon are plugins like Decentraleyes and Privacy Badger. Neither of which can really work with Manifest V3...

Plus, I do make use of Desktop to mobile sync, and Firefox mobile is just so much superiour to any Chromium Mobile browser, just because of Plugin Support on Android 👀

[hot briar]

Interesting. Will read into that more. Not aware of the plugins you mentioned

[coarse comet]

I love plugins ❤️

[grizzled steeple]

Decentraleyes basically anonomizes requests to CDNs and caches them locally, so requests to CDNs are reduced to the absolute minimum necessary and Privacy Badger is a plugin from the EFF foundation blocking cookies and scripts from well known tracking links, but with the twist that it learns what it needs to block as you use it (tho that isn't turned on by default anymore, as one especially greedy tracker has found a way to exploit that learning as a super-cookie in a sense)

[coarse comet]

In case you haven't already, try the Annoyances filters in uBlock Origin, they block a lot of cookie consent/newsletter popups

ClearURLs is also super useful so that you don't get tracked with URL queries

[grizzled steeple]

You mean Clear Links?

[coarse comet]

Nope, https://github.com/ClearURLs/Addon

[grizzled steeple]

Ah. thanks

[coarse comet]

I still run two browsers tho, Firefox for privacy-first browsing and Ungoogled chromium for whatever doesn't work on my Firefox

[ember sapphire]

Better yet you could use switch statments in java. Switch statments also make it easier for the compiler to optimzie it into a jump table or for larger ones a binary search
Just realized its not really applicable to this situations

[coarse comet]

I don't think I've ever used a switch before, to be honest

[ember sapphire]

I personally love them when they make sense. Makes code a bit easier to read and harder to fuck up

[nocturne galleon]

This a good place to ask noob questions about HTML/JS?

[sage vector]

Might also be a case where a regular expression would be better since it looks like some string validation rules. But regular expressions is also something I would recommend for a person that is still learning how to do basic programming 🙂

[sage vector]

You can try? 🙂

[nocturne galleon]

If I wanted an HTML site to grab data and make an addition to an HTML doc, what languages/tricks would I need to use in order to do that? Currently I hazard to guess it would probably be part of a JavaScript script in the html doc, but I'm not entirely sure whether I'm completely right, somewhat right, or not even close.

What I'm thinking is kind of like adding a link to a table element or making an <a> element based off of the link that is given. So it would parse an input field for https://example.invalid/ and then output that to a div with an id, then add an <a> element based off a set of options or a premade script (like opening in _blank or _self by a simple toggleable switch or just make all added links open as _blank)

[sage vector]

Are the data going to come from the same server that hosts the site itself?

[nocturne galleon]

Most likely. I'm thinking of grabbing the data off of a text field (eventually finding a way to parse whether the link works (as in https or starts with / for local files)) in the same doc

All of this is just for a site that is hosted locally only on a windows server

[sage vector]

I am very confused about what you are trying to create

[nocturne galleon]

I want to make a text field in the HTML site that can be parsed for data which will be added to a field like this in the same document or a document in the same folder as index.html```html
<a href=" "></a>

[sage vector]

Should it be persisted?

[nocturne galleon]

Yes, it should add it to the doc if possible

[sage vector]

Ok, but do you want to persist this locally in your browser or on your server?

[nocturne galleon]

Serverside, my b

[sage vector]

I would suggest making the site where your server generates the HTML code and takes input as normal POST calls. I don't really see much benefit here using JavaScript

Not saying we need to go with PHP 😉

[nocturne galleon]

As I said, im very noobish and just got my feet wet with HTML, I wouldnt know what would be the best way to make what I want happen. Hell, I dont even really know how I would work with GET or POST calls overall- I just know there are muiltiple types of calls and ways to use em, just not how

[sage vector]

Do you know any programming languages already?

[nocturne galleon]

Im studying HTML through CodeCademy, I know my way around Java but cant write it, Ive done some python- Just small things really- not in depth either

[midnight wind]

so yeah, you can just make a POST request to server with a form which can add to a database

then when the server gets a request for the website it will dynamically generate the content from the database

there are many ways to do this, you can use js, php, really any programming language on the sever side

anything client side will usually be javascript

[nocturne galleon]

Ok, I see

[midnight wind]

the hype nowadays is to use serverless ways like cloudflare workers to do things like this, but for now I would recommend probably just using nodejs with express webserver using templates

get practice with js

[nocturne galleon]

I got most of your message, but Id need to do lots of googling to understand it all XD
I've been meaning to get into JS as well to do fancier clientside things as well but havent had the time. Now that im on my christmas break im most likely gonna try n get far on my HTML and JS then.

[ember sapphire]

I do wonder how inefficient serverless is with how many layers of abstraction it uses

[midnight wind]

@nocturne galleon also I would learn more about how web works, because from what I read you don't really understand it too much. HTML is just a document sent to browser to render. HTML is not a "site". The backend is what makes a site a site and does the heavy lifting

[nocturne galleon]

I used HTML site as an abstract for the entire folder structure I got- I dont quite know all the right terms yet so I use as close a language as I can manage.

I do understand the general concepts of POST calls and GET calls and whatnot, just not their entire range of things they can do or how I would or could use them

[midnight wind]

how are you "opening" the html files right now. Are you running a dev web server or just double clicking on the html file?

[nocturne galleon]

Running Windows Server's IIS role and pointing it to the share holding all of files for the site. HTML, CSS, manifests, favicons- etc

[midnight wind]

ah

just an fyi windows IIS is rarely used

[humble mirage]

rarely used, huh

[midnight wind]

I've never seen in the wild yet myself

[nocturne galleon]

Fair, but as it stands I wanted to get some windows server experience for my IT bachelor (Had servers 1) and didnt wanna get into installing things that werent Windows features yet since it was my primary lab server

[humble mirage]

I set up IIS at my job a bunch of times

like yes your average node/rails/java stuff won't use IIS (because it will just be thrown at a linux anyways) but there's plenty of reasons for IIS to be used

[midnight wind]

yeah ik

it has a place

[nocturne galleon]

Live editing is on VSCode is so fine. XD
#BestPractices=NoBestPractices amiright?

[ember sapphire]

#BestPractives==NoBestPractices*

[nocturne galleon]

Right XD Missed out on that joke

Still thinking in yaml from my docker mishaps this mornin

[lilac pebble]

Any maths Wiz's? In what context usually that we come across element wise multiplications of matrix?