DIY Soldering Kits

RGBend

Audio-reactive VGA FX kit Status: v0.2 Prototype

2 octaves monophonic (5Volts CV) keyboard with 5 octaves selector knob. Powered by ATBase, or to use standalone with USB to stereo mini jack adapter. With the ATKeys CV module 5 octaves can be generated as CV signal (0-5V = 1V per octave). 2 octaves can be selected via the octave potentiometer and are available on 24 keypads. At the same time a gate signal goes to the output, which can be switched to a continuous signal by the latch switch. You can either connect it directly to the ATBase via the red jack or use it standalone with a USB to mini jack adapter for any CV capable device.

Status: v2 kit

ATBase Console

Expandable ATtiny85 synthesizer, which acts as a basis for a mini modular setup.

The ATBase is the next level ATtiny Punk Console with an extended frequency spectrum into the bass range. Three red 3.5mm jacks now replace the body contacts. These can be used to manipulate parameters from the outside with control voltages of 0-5V. The trick with the red marked jacks is to lead out the supply voltage and simultaneously lead back the modulation signal via a stereo cable. This allows you to test your own CV circuits (e.g. super simple with 2 components: a resistor + light sensor) or connect noisio CV modules.

Status: v3 kit

ATtiny Punk Console

The ATtiny Punk Console (ATPC) is a programmable 8-bit mini synthesizer. From Noise Toy, Drum Sound Generator, Atari Punk Console to Drone Generator - everything is possible! New synth programs can be uploaded via smartphone or PC using short audio sequences to reassign the 4 potentiometers. Own cod...

AT Midi2CV

Midi to CV (control voltage) and clock signal converter. Receive 5 octaves over 5 volts in 0.83V steps, with MIDI note input from #24 (C0) to #84 (C5). A 5V signal corresponding to Note On / Note Off is output at the gate output.
The clock signals can be divided with the potentiometer and reset by...

Motörbörd

My design for the lovely Motörbörd Status: workshop kit, available

Levitation Oscillator

10-Voices drone oscillator /sinus or sawtooth with optional noise mode will make you float.

With its 10 oscillators, the Levitation OSC produces spherical sounds and beats down to the very deepest sub-basses. Sine and sawtooth are available as waveforms in a wide frequency range. In addition to additive synthesis, there are optional noisio-typical 8-bit register overflows for chaotic sound calculation and a one button random chime generator. A signal to the Trigger In or pressing the corresponding button fades out the sound (ducking gate).

Status: v1.1 kit, available

Photonotron

Theremin-like instrument controlled by light with 2 voices and some special chaos & sound effects. A perfect kit for soldering beginners. Functions: Blend from sine to square wave generator or switch to chaos arpeggiator mode. Output via speaker and 3.5mm jack socket.

Sound example (external Yo...

LFO/EG

Maybe the smallest LFO (Low Frequency Generator) and envelope generator module (ADSR) in one. 68mm x 45mm, 5V-level. Powered by ATBase or to use standalone with USB to stereo mini jack adapter.
The LFO/EG can be operated as a 5 volt low frequency oscillator or envelope generator. You can set the mode by pressing the button at startup. In LFO-mode 5 waveforms are available: Square, Sine, Triangle, Ramp-Up, Ramp-Down. Furthermore, speed, modulation depth and bias (average value) can be set. As an envelope generator, the module can process the classic parameters attack, decay, sustain and release. The signal can be triggered via the gate input or the button. The LFO/EG can either be connected directly to the ATBase via the red jack or can be used standalone with any CV capable device and a USB to mini jack adapter.

Status: v2 kit