Known bug: Label 2 and 3 at the switch are reversed.
- 4hp
- +/-12V 10mA/1mA
- 1 PCB 2 layer
- common jack is connected to one output at a time
- DG412 Rail2Rail analog switch recommended
- step input
- move to next position
- TN pin header on pcb
- reset input
- move to step 1
- locked on step 1, while gate high.
Schematic and layout with KiCad 5. Panel with Inkscape + shenzen2svg → Kicad
Ordered mine at JLCPCB. Added ICs by hand. Gerbers include marking for order number. BOM with part numbers for their assembly service.