Make some pink noise!

All the designs were used only for comparison and not for any commercial purposes.   At the beginning… Around a week ago I’ve got a strong internal need to synthesize a sea waves sound (we don’t have ocean in Poland), as I try to design an updated version of my Binaural Beat Generator. Usually this […]

Syntom II eurorack closeup

Syntom II

Back to 2006 It was year 2006 and my electronic knowledge was extending. I’ve allready build a ICL 7107 voltometer and a dekatron spinner, therefore I felt I can do something really complex. One day I saw a Syntom II, an electronic drum synthesizer project printed in Electronics and Music Maker magazine, (E&MM, 1983). I […]

Synth DIY – how to start?

This article should not be considered as a beginner-friendly do-it-yourself synth list, more as a more general showcase of possible synth DIY entry points. Some devices presented here are already obsolete or hard to find, but I kept them as good examples of what you may looking for in the future. All photos are shown only as […]

ENVY – LEGO figure showcase module

GF: What does this module do? Me: It shows a LEGO figure. GF: And? Me: Thats all. GF: … (gives me that you-have-wasted-a-week-of-your-life look and walks away). I was inspired by Gieskes “non-musical” modules, like “bottle opener” and “do-not-touch”. My module is a small display window with a iluminated LEGO figure. But not the ordinary one. It comes […]

SDSV hihat expander

It was back in 2014. Thanks to user hidden behind wutierson nickname I managed to finish digital “metallic” sound generator based on the one used in Simmons SDSV hihat / cymbal drum modules.   The story SDSV drum brain was shipped with only 5 modules – bass, snare and 3 toms. Hihat didn’t belong to the […]

Kraft Drum

Kraft Drum (aka V829 Drum) is a Vox Percussion King inspired device. VOX PK is quite rare drum synthesizer from about 1967. The most noticable use was on Kraftwerks track called Autobahn – you just cannot miss this punchy and somehow distorted bass drum.   The circuit First, I got some lovely Vox Percussion King […]

HC-2 handclapper

Not everybody needs an 808 Some time ago i started a DIY handclap project. The design was not based on Roland TR808, but Boss HC-2 (or Amdek HCK-100, if you like). With some problems I completed the prototype and made an eurorack module – it works really well.   The circuit Boss circuit is different […]

Hip Bass Drum

Hip bass drum is project brought to you by Craig Anderton. Compared to other drum circiuits it’s very simple (but unique) design. The schematics scanned form Polyphony, October ’83 can be found all over internet (but if you have any problems getting one, call me). It is hard to find any clear demo of the […]

Modular synth case

One day I decided to move my modular drum synth into bigger case. The main reason was my girlfriend wanted to use my previous Ikea Rast style case as an balcony table. I had no choice.   The plans The design is based on Doepfers A-100 Low Cost 9U case. I made few “improvements” to […]

Modular synth busboards

There is no modular synth without busboards. My design is based on Doepfers A100-BUS. It is simple, cheap easy to make. Same as Doepfer, mine has CV and GATE buses – thus 16 pin power connector. Schematic is very simple, but you have to do it before PCB design. Nothing fancy here, 14 2×8 pin […]

Modular synth power supply

This  article was updated  slightly on 21.05.2018 and includes filtering capacitors change and some output voltage measurements.   Introduction Every modular synth needs a power supply (except systems containing only blanks and Giskies 12 HP Bottle Openers). Switched power supplies sometimes cause problems (when you have a lot of small modules, all with input power […]

MFOS Echo Rockit

MFOS Echo Rockit is an small, portable synth / effect processor. The original project can be found on www.musicfromouterspace.com and belongs to Ray Wilson. The device is somehow similar to Korg Monotron Delay, but it has more modulation options. In my construction I have added amplifier with small, but very pugnacious Visaton speaker. In small […]

Korg Monotron Delay Implant

Resonance mod, LFO to cutoff modulation mod, if you are into Monotron Delay modding you have probably done it or at least know it exists. I wanted to go step further (and keep Monotrons sexy size). Introducing: Monotron Delay Implant! What is implant? It is an additional mini PCB, containing opamp and some passive stuff […]

GT2 Tube Amp Simulator

Every electronic engineer in his life have to build: a strobe light, a clock, adjustable LM317 power supply and guitar effect. I build all previous devices and only effect left to make. I decide to build SansAmp GT2 overdrive – I don’t own a guitar, but I like the hardcore style disorted bass drum sound. […]

Binaural beat generator

  When two sines, with similar, but not equal frequencies are mixed together, beating effect occures. But when they are played by separated channels (f. e. in stereo), mixing happens in your head, resulting in binaural beat. This device lets you make this kind of beats. Please welcome, one and only (I couldn’t find any […]

SDSV voice board

There is a story behind this module. Using my countless stupidity, i menaged to broke both hands while riding my bike. After that, i had a lot of free time, but i wasn’t able to many things. With some training i menaged to master computer mouse with partially plastered hand and keyboard striked with pencil. […]