Very simple LCD unit with almost no external components, driven directly by a computer printer port.

A simple intruder alarm controller I build and used in my old apartment. Uses an AVR ATtiny2313 microcontroller.

A desk panel box full of LEDs, buttons and switches. Built for the rack box project.

33 high intensity LEDs are controlled with a AVR ATtiny2313 microcontroller. Four flashing patterns that can be set manually or cycle through. Uses an AVR ATtiny2313 microcontroller.

RS-232 interface module, with voltage measurement. Used to communicate with the emergency power off unit in the Rack box project. Installed inside Rack box status panel. Uses an AVR ATmega8 microcontroller.