WAH & FUZZ Guitar circuits

  
These two projects , Wah and Fuzz, are the results of a modification to a Morley dual channel volume control pedal that one of my sons suggested I undertake as He had no use for the volume unit but thought I could modify the pedal into a Wah unit. I decided later to add a Fuzz circuit and combine the two into a single switchable unit as described further on. Not being one to re-invent the wheel, I downloaded several circuits from the Internet and after breadboarding severals I chose the original Morley circuit as it had the best sound and was using an LDR/LED control which simplified its construction.
WAH & FUZZ Guitar circuits - schematic

Using the phase shifting design with an op-amp sounds very close to the inductor type Wah circuit but with no up and down variation like the pedal allows . I concentrated on the triggering aspect of the LED/LCD to try and produce a varying attack and de



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