I've made a few RGB LED strip driver boards for my project (see pictures below).
Due to minimum quantity requirements I had to order more boards/parts than I needed, so I ended up with some extras. I would like to try to sell them to recoup some of the costs. I currently have 5 of them ready-made and have enough parts to make 5 more.
The boards can be stacked on top of each other and each channel (R, G and B) has a 4-position jumper to select from 4 different pin combinations. So, one can stack 4 boards and control 12 channels (or 3 sets of RGB LED strips) from the same RPi.
The boards are made for RPi Zero (W), but they will also fit onto regular RPi (I've tried with model 3B+ that I have).
My questions are:
1. Would anybody be interested in getting some of these?
2. What do you think would be a reasonable price? I was thinking $25 + shipping per board.