main MK_VCO/Fireball/Fireball_panel.kicad_pro 505 lines { "board": { Add a front-panel PCB Send Account Recovery Email The build is pretty straightforward except for mechanical assembly, and one with an eye towards doing it all in one module with a capacitor / resistor pair, see Fireball's hard sync input. But could also do all-different colors, but unfortunately Mouser only has A1Ms in orange. Expensive, about $3 in parts (no ICs), and a switch to disable reset (run once). - Momentary-normal-off pushbutton to manually step. - SPST.