Connecting 100000 (yes) buttons, switches & potis to a SINGLE USB interface for $30

[Gruman]

8 hours ago, winghunter said:

What about these LEDs ? They already have built in resistors and take 5V directly from power source. They are a bit more expensive but they already come in a matrix form ready to solder.

https://de.aliexpress.com/item/1849928878.html
https://www.amazon.de/CHINLY-stücke-WS2812B-Adressierbare-Kühlkörper/dp/B01N0GIHFG/ref=dp_prsubs_1?psc=1

 

Nope. Those are "Smart RGB". Each to be programmed from a MCU sequencly and all the time. Usage in an RGB strip or similiar.

You have a 5v input, GND, Data In and Data Out.

 

About inputs: How about 64 inputs?

http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=94&products_id=300

 

The 32 input cap is mostly an DirectX old restriction, which only affects old software. With a Multiplexer/Matrix you could even scale up a Arduino board to more inputs. I think up to 128 Inputs would be possible.

Edited December 15, 2021 by Gruman

[winghunter]

Hmm, I wonder if similar ones exist without the data port. And if they would have a reasonable lifetime when driven directly by a 5V source.

I.e. LED 5060 or these

https://www.aliexpress.com/item/32816992410.html

Edited December 15, 2021 by winghunter

[Gruman]

Why do you need a similiar one? What are you looking for in LED's? You can simply use a LED Matrix (8x8) and use a Segment driver (MAX7219) for a testbed. Connect those to a Arduino via SPI and you can test your Idea before you do anything else.

There are tons of wired LED available with a current limiting resistor already installed prepared for 5V. And you don't need a 10W LED... First they will drain way to much current and your camera will simply be overexposed.

I'm with Yogi opinion. I still cannot see any benefit over a proven modular approach and connect everything via bus.