After cabling audio internally with shielded wires, and solving a grounding problem in the input jack, noise has been reduced drastically when working from battery. There is still an annoying computing noise when connected to an external 9V power supply. I am going to put a removable ferrite bead, still waiting for the parcel to arrive.
I have also finished schematics for the project, that have been uploaded to https://www.hackster.io/manolonte/pop-programmable-open-pedal-9acddf
- Trying with ferrite bead
- Adjusting output volume, too high right now
- Giving a function to second switch, maybe fast reset for changing mode quickly
- Reducing latency
- Creating new effects: some ideas:
- auto-ovation: just for fun, when you stop playing, simulate an audience ovation, just like in “Blues Deluxe”, from Jeff Beck Group
- tremolo, phaser, etc.