Modules

An oscillator module built into a business card

A utility module for converting MIDI messages to CV

A reverb module based around Electrosmith's Daisy Seed DSP platform.

A basic PT2399 delay designed to work with Eurorack modular synth.

A utility module with two boost channels to amplify any audio signal up to 10V peak-to-peak

A module that generates white noise using a BC548 transistor and an OpAmp.

An adapter for boosting guitar output level up to synth level and synth level down to guitar effects level

A low frequency oscillator based on the Boss CE2 Chorus pedal LFO section

A utility for connecting Eurorack +/-12V power to breadboards

A Granular synthesizer voice based on the Auduino project

A 4HP Voltage Controlled Filter using a diode ladder design

A pattern based clock using an Arduino Nano

A simple 2HP passive multples PCB

A four parameter envelope generator on PCB

An Arduino-based CV quantizer. Input and output at 0 to +5V range.

A way to print multiple boards on a single panel.

A linear Voltage Controled Amplifier based around an LM13700 OTA IC.

A simple CD40106-based VCO with sawtooth and pulse waveform outputs.

A circuit to adapt a karaoke effects unit to modular.

A wavefolder module based on Ken Stone's design.

An envelope generator based on Rene Schimtz' "Fastest Envelope in the West".

A low-frequency oscillator based on HAGIWO's Ardiuno code and schematics.

I tried to design an overdrive that works on +/-12V power.

A freqency-modulation VCO based on HAGIWO's design

A delay module based on the PT2399 effects IC.

An active high pass filter based on a TL072 and a vactrol.

My take on the All About Circuits VCO.

The Bong0 module by Nonlinearcircuits.

An Arduino-based synth module that produces both randomized CV and randomized gates.

A Baby-8 based sequencer with three trigger outputs for drums.

A metallic hi-hat module based on six square wave oscillators.

An AND logic gate module using a CD4081 CMOS chip.

An improvement on my first LPF. This one runs on 18V power.

A snare drum module built around a bridged-t network filter configuration.

A kick drum module built around a bridged-t network filter configuration.

Low frequency oscillator based on the MXR Phase 90's LFO block.

Utility circuit for converting gate signals into short triggers.

An 8-step sequencer based on the classic Baby-8 design. Works on +9V power.

An OpAmp-based low pass filter based Moritz Klein's LPF tutorial. Works on +9V power supply.

An envelope generator with attack and release controls.

A clock module based on an Arduino-nano, has multiple divisions and variable pulse widths.

A voltage-controlled attenuator using DIY vactrols.

A completely passive low pass filter using DIY vactrols.

The first analog module I've built using a CD40106 IC. Works on +9V power supply.