This is an auxiliary PCB (and a front panel) to go with the Music from Outer Space Voltage Controlled LFO. It adds a sync input, so you can consistently start an LFO effect with the same phase.

It’s based on a design by Tim Parkhurst. I just adjusted some component values to match the MFOS design, and used a different JFET.

The board also supplies footprints for a power reversal protected Euro/Kosmo style power connector to supply the main LFO PCB as well as the modification.