Use this circuit with your circuits to output a staircase-style CV. The 4516 Binary UP/DOWN Counter is controlled by a two 4093 CMOS NAND Gate oscillators; one controls the clock speed, the other controls the direction of the binary count. A R-2R resistor ladder converts the binary output into a scalable voltage, which is then limited by a potentiometer and buffered for use with synthesizers that can accept a Control Voltage.
Staircase CV (Control Voltage) Generator
