LMNC simple vco range

[analogoutput]

Also see:

Octave switch for simple CEM3340 Oscillator?

Hi all, I built two of Sam’s basic CEM3340 oscillators, and they work well so far. Unfortunately, my panels each have an unused hole in them, so I’d like to put something there, like maybe a 1 octave switch. Does anyone know how to set that up? I’m guess it’s fairly simple. Fingers crossed. Thanks!