Modular Multi Effects Guitar Pedal

Hello everyone,

I recently got the idea of making an effects pedal, since I play guitar.
The idea I had in mind was simple on paper: get two ,ain PCB's, with a couple of coplanar 180° PCB connectors on either side. On the first board I would have my input jack, the Arduino (preferably a Nano) and three potentiometers to control the different parameters. Then, if I have, say, a Distortion PCB with on either side a connector, I could just plug it in to the different connectors. On the last board I'd have the signal mixing, maybe a display and a 4-way switch to select the effect I want to use.

Here is a rough sketch I made in Paint.

The problems I currently run into are the following:

  • How do I make sure that the three or four values of my potentiometers get "distributed" to the four different effects?
  • How can I save different values for different effects?
  • What kind of connector should I use? I would like it to be a straight connector, but I also want a connector that is sturdy enough that my connections don't get loose when I shake my pedal

If anyone has any ideas or remarks, please let me know!
Thanks in advance,
WalrusGumboot

It's hard to tell much about the inside functionality from your outside view of things.

Do you have already electronic modules for the effects? If so, please supply according links.

The pedals are not fixed by connectors. Instead e.g. flexible (ribbon...) cable goes to connectors mounted to the chassis or enclosure. Potentiometers are operated directly from the pedals.

What's the role of the Arduino?