he Simple VCA is a DIY friendly module, designed to be integrated into an analog synthesizer. It is compatible with the Eurorack format: 10-pin power supply connector and voltages (+12, 0 and -12V). The low part count and the easy-to-find components make the Simple VCA a perfect first module in a beginner synthesizer.

A VCA (Voltage Controlled Amplifier) is one of the most important part in a modular synth. Coupled with an oscillator and a control signal, it will shape the volume of your sound. The control signal comes either from an LFO (see the Simple LFO), or an Envelope Generator.

The Simple VCA has 3 signal inputs which allow you to mix 3 audio signals together.

The "Initial" potentiometer sets the global amplification offset.

The module is 4 HP wide and only 4cm deep.

The Jack connectors are Cliff UK sockets, available at Reichelt or Small Bear Elec.

Version

The current PCB version is 1.0b

Options

The Simple VCA is available either as a PCB, a PCB with its 4HP Front Panel, as a Kit or Fully Assembled. Contact me if an option isn't available.

About the Front Panel

The Front panel is made with 1.6mm thick PCB material, with a black textured finish.

Links

More informations, documentation and updates