Also see my blog:electronics




Custom controller with 5 rotary encoders (endless) with as many push buttons, 2 soft-potentiometers and 3 touch sensors (capacitive). I use it to control my sound and video software. It is built using the brilliant V-USB from Obdev and shows up like a standard HID device. Small, lightweight and just one cable (USB). Plus it is very cheap to build - see parts list. The biggest cost is the encoders.


Another custom controller with 4 potentiometers, 1 slider, 1 light sensor, 16 pushbuttons and 1 switch. It is also built using the great V-USB (a.k.a AVR-USB) from Obdev.


27 wireless boxes with up to 10 digital sensor inputs and 2 analogue outputs (PWM). Built around the Mirf v2 transceiver from SparkFun which has a range of approximately 80 meters. Firmware is written in assembly and the radio network in SuperCollider. Specially designed for the installation OrFi (see musicalfieldsforever.com).


4 button MIDI pedal with 62 presets. The buttons send note on-off/on-on and controller data in different combinations or cycle banks. Each preset can have up to 3 banks of settings. Casing&design: Hadrian Prett, Software&electronics by me


Software phrase sampler / loop machine with a custom hardware controller.


A device for switching four composite video signals. Either pass-through signals or take video from the fifth input. This fifth input is normally a black frame and thereby the device is functioning like an on/off switch for the individual four channels. But the fifth input can be any video signal.
The 4 input connectors are red, the common 5th input is yellow and the 4 outputs are black. This box is powered by a 9V AC adapter.


Video switch for 4 s-video or 8 composite video signals. Mainly used for quickly switching between four connected cameras. It needs power from a 9V AC adapter.

CV-MIDI boxesπŸ”—


CV-to-MIDI / MIDI-to-CV converter unit. Usage: remote control, installations, analogue synths, sensors. Rackmount 19" with 1/4" jacks, 12 inputs (4 analogue, 8 digital), 12 outputs (4 analogue, 8 digital), MIDI in/out/thru jacks, 9-12V DC power supply.


Firmware upgrade for f0b4488. Adds software programmability from any MIDI equipped Mac/Win/Linux system. Customize what kind of MIDI data is transferred and scale CV output.


CV-to-MIDI converter unit. Usage: installations, sensors, custom instruments. 62 inputs (16 analogue, 46 digital), 2 MIDI out jacks, 9-12V DC power supply.


CV-to-MIDI / MIDI-to-CV converter unit. Usage: remote control, installations, analogue synths, sensors. 3.5mm jacks, 16 inputs (8 analogue, 8 digital), 12 outputs (all digital), MIDI in/out/thru.


Tiny MIDI circuit with 14 digital in or out.

cv-to-midi16+8 (old)πŸ”—

Customized general-purpose CV-to-MIDI converters based on the basic stamp 2 microprocessor. Plug in any variable resistance (sensor) and convert it to MIDI controller data or use the digital inputs to generate note on/off messages. The pictures and schematic below show one possible setup with 16 analogue and 8 digital inputs.

Max4 patch screenshot for cv-to-midi16+8