Home sensor nodes, based on ESP8266.
IRlicht is a 4-channel (RGBW) controller for LED-lamps, based on Arduino and controlled via infrared by a universal remote.
Driving a servo via USB-Port.
Fading LEDs via USB-Port.
Blackbox for driving many LEDs.
Blackbox for dimming LEDs.
Converting old keyboards to USB.
A radio controlled clock, showing the time in several binary formats.