Voltage inverter/rectifier (2HP)
Kinks by Émilie Gillet.
A little utility module that will invert, half-wave rectify (leaving only the positive voltage), or full-wave rectify (inverting negative voltage) incoming signals. Great for creating interesting LFO shapes, instantly turning them into envelopes; works at audio rates as well!
This module uses a standard 8-jack 2HP PCB. A normalling wire between the top and bottom halves can be added to taste. This doesn't have to be input to input, why not normal the inverted output to the next input?