The Phase Locked Fuzz is a fuzz / guitar synthesizer that is based around a "discrete" phase locked loop circuit.

It was designed as a personal challenge, to learn more about phase locked loops, and uses transistors and op amps instead of a dedicated PLL IC (CD4046). It's a bit of a novelty, as there's really no benefit of doing it this way. But I did replace the typical square wave oscillator with a saw tooth oscillator, to add more of a difference compared to a CD4046 based pedal.