Scaled voltage reference with octave and semitone steps

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Scaled Voltage Reference: Front view
Scaled Voltage Reference: Front view

This module provides high precision CV outputs in 1V (octaves) and 83,3mV (semitones) steps. The 1V output goes from -5 to +5V. The 83,3mV steps goes from -5 to plus 5 steps (semitones). This module is thought for all who are missing octave switches in some modules. Especially in VCO. With this module you can switch octaves and semitones as well.

Specs and features

  • High precision output from -5V to +5V in 1V steps (octaves)
  • High precision output in 83,3mV steps, +/- 5 steps (semitones)
  • Runs on +/-15V and +/-12V
  • Power consumption around 30mA each rail

The documentation and the Gerber files for download can be found in my website.

Scaled Voltage Reference: Schematic control board
Scaled Voltage Reference: Schematic control board
Scaled Voltage Reference: Schematic main board
Scaled Voltage Reference: Populated control PCB
Scaled Voltage Reference: Populated control PCB
Scaled Voltage Reference: Populated main PCB
Scaled Voltage Reference: Populated main PCB
Scaled Voltage Reference: Side view
Scaled Voltage Reference: Side view
Scaled Voltage Reference: Side view
Scaled Voltage Reference: Side view