Simple synth DIY

This page is intended as a list of simple but useful components that can be built for a modular synth.

If you're new to DIY electronics, please read the Synthesizer do it yourself page first.

This list of modules is intended to be format-agnostic (so, can be built for Eurorack, 4U, 5U etc.)

Simple passive circuits

Passive mult

Probably the easiest module to possibly build, all you need is some jacks, some wire, and a soldering iron. This module allows you to split a signal to be sent to multiple destinations. Passive mults are not suitable for V/octave CV control, because the voltage may drop when split, due to varying impedances in the destinations'

Schematics

• simply wire all jack tips together, and all barrels together. More complex designs can use switched jacks to split multiples into smaller sub-groups.
• AI syntheis have a schematic for a splittable passive multiple, as well as full PCB-based kits available.

Atari Punk Console

The Atari Punk Console is one of the simplest audio-generating circuits. There are CV-controllable versions available, however,they do not track voltage, and so are not suitable as melodic voices.

Schematics

• Synthrotek eurorack schematic - this circuit includes a 9V voltage regulator, and so could be adapted to any module format.