$4    Voltage-Controlled Resistor PCB


For use in circuit-bending, or modifying circuits with a variable resistor.

The resistor is only affected by positive voltages.

Uses two pots -- one for initial control, one CV attenuator.

Can use single or dual vactrols, which we also sell.

Has optional range-trimming resistors.


VC SOUND SAMPLE

Toy keyboard abused by modular VCO.

Schematic

Thanks, Dan Kennedy from Great River Electronics!!!!!!

He laid out the board!


R1, R2    51k

R3      2.2k

C1     100n

DL1     link out

R4-6 only used for trimming output swing if needed