For this week, I wanted to make a device that takes a mic input and displays it out an LED output, changing the LED intensity based on the sound amplitude and the color based on the frequency.
I went ahead and designed a board in Eagle, as can be seen below:
The circuit is basically a combination of the input mic circuit and the output RGB LED circuit as I have enough pins on the AT Tiny 45.
I went ahead and milled the board:
Fully stuffed with components:
After milling, I decided to try programming the board! Thankfully, it programmed successfully. My initial program was just the PWM LED code. Here’s a video of it working!
Unfortunately, when I tried to program the mic circuit, I wasn’t able to get any output to show up to the LED and just stayed on a single color :( I’m not 100% sure what happened, some of the traces definitely don’t look great because of a lot of heat gun that seemed to melt the copper a bit but I’m not really sure what else could be wrong.