Testing

Red waveform: input

Blue waveform: output

These are the waveforms that are generated when the distortion potentiometer is fully turned on. At this point it is 1Vp-p on the output.

Red waveform: output

Blue waveform: input

The output waveform can be seen shifted back and forth by adjusting the delay potentiometer and by adjusting the echo potentiometer the waveform starts to bounce and show the "echo" effect.

Distortion breadboard design

Delay breadboard design

Distortion breadboard waveform video, just adjusting the distortion potentiometer.

Delay breadboard waveform video, first adjusting the delay which can be seen as the shift back and forth. Then I start adjusting the echo potentiometer and it can be seen as bouncing or a vibration of the input waveform.

Schematics

Below are the schematics I've made throughout this process. At the end are my final schematics. Each schematic gives a small description of its need in the pedal.