The educational set covers everything from resistors, n-channel and p-channel MOSFETS, diodes, and a ring oscillator circuit. [Jim] has the chips and the datasheets, but doesn’t have the ...

so has taken it down that path by producing a 74HC based ring modulator guitar pedal. In both circuits, a 74HC4046 phase-locked loop chip serves as an oscillator, driving a 74HC4051 analogue ...