https://forum.pedalpcb.com/threads/error-connecting-ch341-1.11239/
Error connecting CH341(-1)
Had some troubleshooting issues. Power at IC5 wasn’t at 3.3v. LED kept flickering, had shorts in TL072.

Power was fluctuating at 1.5 to 5volts and wasn’t getting 9v either. Also usb connection wasn’t working for ASProgrammer.

Drivers were needed on my machine.
Tried first two here:
https://www.onetransistor.eu/2017/08/ch341a-mini-programmer-schematic.html

Also some noob issues, had LEDs reversed and wrong input pins on jacks. Overalll a great PCB, very solid for resoldering also, pads are solid.

I really like the USB ability, kind of future proofs it or lets user ability to add/edit own patches. Only issue is it only has 3 presets. Would love if Pedalpcb made a dev board with rotary switch for 8 presets.