Bulb Board Mini
The Bulb Board is a plattform to help you to quickly check ideas without needing to buy or build special hardware. It runs out of the box, USB-powered and brings its own debugger. Simply start writing software and connect whatever your idea needs to the MCU pins.
Game Taster (German)
How to build-up a game-show buzzer in a simple way with transistors, diodes, resistors and some relays. The result is bus-system where several clients can be connected to a master.