A sort of two-in-one little module. A sawtooth to triangle converter (according to the Moritz Klein schematic) followed by a Lockhart wavefolder (according to the Ken Stone schematic). The board is rather tight with three components soldered at the underside. If you so wish you can space out the components and/or add extra rows for a 2x5 power header and Shottky diodes. I omitted those because I use simple JST-XH connectors with colour coded cables.
There is no modulation input, but one can modify the layout to add a switch that will separate the potentiometer in order to be able patch in a VCA in its place. The VCA’s amplitude modulation should work as a modulator for the wavefolder.
