Hi, I got a project where I need several stopwatches that they will start/reset with a command from a "master", but it will only stop when a push button gets press and the only the stopwatch that got press will stop and the others will continue, I got the time keeping process covered and the stop push button, where I need help is in the type of display I want to use, which is a 64x64 led matrix display that I have never used and I'll appreciated all the help I can get.
I was thinking in using some Esp32 or any arduino with an ATSAMD21, or even better a RP2040 to get costs as low as possible, because I need about 20 stopwatches.
This is for CrossFit competition where the time starts when a judge presses a button and each athlete stops it's time when it gets to the finish line, just to add more excitement to the competition. I don't owen a copy of the Arduino cook book ;(
That is your loss, the book is not that expensive or free from the library. I just did a search for the cheapest Arduino then Raspberry Pi, the results were about $2.75 for the Arduino UNO and about $4.5 for the Pi mini. Both were china vendors. There is also a Raspberry Pi Cookbook to read depending on your choice. Either family will do what you want.
