Now I'm trying to figure out why the VCO I just built functions in reverse. Positive CV input yields only horrible noise yet a negative voltage of 0 to -12 creates a robust sounding sawtooth wave. I would have thought it the other way around. Checked the connections dozens of times, re-checked the schematic and board, doubted my supply and meter so I tried a 9v battery and the same results... +vdc to the CV input yields nothing yet -vdc makes it oscillate. Odd. I am pondering an inverter circuit ahead of the CV input as my CV source would be 0 to a positive value. Thats outside the scope of here, but an interesting detour along the journey.
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