WIRING DIAGRAMS

 Here are the wiring diagrams for the PCB's.

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Precision ADSR

 Steiner-Parker filter

Resonant Lopass Gate old version

Resonant LPG new version

Moog ladder filter

State Variable Filter

Korg MS20 filter

Digisound-80VCO bi-polar version

Digisound-80 older version

555VCO Thomas Henry

If you run this vco on +/-12V and you can't make the rampwave connect at the zero volt level than solder a 1M resistor in parallel over the 1M resistor R22. That's the second 1M resistor from the left underneath the V/Oct trimmer. (R49 in the original schematic. It connects straight to pin 6 of U4 from the wiper of the Ramp Conn. trimmer).

X4046 VCO by TH

Utility LFO

8 step sequencer