This small utility PCB mounts directly on to a standard 1-pole 12-way rotary switch allowing you to replace the conventional COARSE TUNE pot in many VCO designs with an Octave or Footage selector.

Please note that this design uses surface-mount components (0805 and SO-8) and so requires some additional skill to assemble. I can supply these components pre-mounted on the PCB if required.

Octave Switcher Schematic Octave Switcher PCB Octave Switcher Bill of Materials