LEET Control

The LEET Control is a miniature MIDI accessory suitable for controlling settings in your DAW, like volume, decay or filters. It is low cost, easy to build and compact in size. With a different firmware it can also work as an arpeggiator.


The LEET Pad is a miniature MIDI keyboard suitable for drums and effects. It is low cost, easy to build and compact in size. It has full color LED blinkenlights for playback visualization.

LEET Chord

The LEET Chord is a MIDI keyboard that plays chords of your choice. It is easy to build, affordable and has vibrant RGB LED blinkenlights. Possibility to adjust number of notes, scale, tonic and root. It is perfect for chord progressions (I – V – vi – IV ;)

LEET Keyboard

The LEET keyboard is a modular & affordable ($6) MIDI keyboard for your favorite DAW.
This post describes how the keyboard works, how it was developed, what you need in order to build your own, and a step by step building instruction.

LEET Synthesizer

LEET is a stunning, modular & affordable ($6) MIDI synth for your favorite DAW.
I have designed a keyboard, drum pad, chord keyboard, arpeggiator and a step sequencer all with RGB LEDs for playback visualization.
They are easy to build and anyone with a 3D printer and basic soldering skills should be able to replicate them. Everything is open source and hacking is encouraged!