redKontroll

custom controller with 5 rotary encoders (endless) with as many push buttons, 2 softpots and 3 touch sensors (capacitive). it is built using the absolutely brilliant avr-usb from obdev and shows up like a standard HID devices. small, lightweight and just one cable (usb). plus it is very cheap to build - see parts list. the biggest cost is the encoders.
_schematic
_firmware and schematics

orfi

27 wireless sensorboxes with up to 10 digital inputs and 2 analog outputs (pwm). built around the mirf v2 transceiver from sparkfun which has a range of approximately 80 meters. firmware written in assembly, radio network in supercollider. specially designed for the installation OrFi (see _musicalfieldsforever.com).
_schematic master
_schematic slave
_firmware offline

midilådan

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
_schematic
_firmware
_presetinfo

hOLY dOPA

software phrasesampler / loopmachine with a custom hardware controller.
_schematic
_firmware

redFrikKamera

videoswitch for 4 s-video or 8 composite videosignals.
_schematic
_firmware

cv-midi boxes

f0b4488

cv-to-midi / midi-to-cv converter unit. usage: remote control, installations, analog synths, sensors.
rackmount 19" with 1/4" jacks, 12 inputs (4 analog, 8 digital), 12 outputs (4 analog, 8 digital), midi in/out/thru jacks, 9-12v dc power supply.
_schematic
_instructionalMaxPatches

f0b4488+

firmware upgrade for f0b4488. adds software programmability from any midi equipped mac/pc/linux system. customize what kind of midi data is transferred and scale cv output.

f0b1646

cv-to-midi converter unit. usage: installations, sensors, custom instruments.
62 inputs (16 analog, 46 digital), 2 midi out jacks, 9-12v dc power supply.
_schematic

f0b80812

cv-to-midi / midi-to-cv converter unit. usage: remote control, installations, analog synths, sensors.
3.5mm jacks, 16 inputs (8 analog, 8 digital), 12 outputs (all digital), midi in/out/thru.
_schematic
_atmega8535firmware
_instructionalMaxPatches

f0bs_mini2

tiny midi circuit with 14 digital in or out.
_schematic

cv-to-midi16+8 (old)

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 shows one possible setup with 16 analog and 8 digital inputs.
_schematic
_firmware