Spent the day soldering, tried putting all 4 channels on one board. It was a terrible idea, should have used a bigger perfboard, but it made a horrible spaghetti nest of wires.

Right now Channel #1 seems broken, channel 2-4 looks kinda functional however the square wave has a tip that slants downward. My guess is that powering all 4 units requires more power than I have setup from the oscilloscope’s signal generator. When I get more time I’ll try to get an external source to power everything and re-validate 2-4. Channel #1’s issues I believe come from the silly solder bridging I attempted instead of adding another wire…another lesson learned.