Light intensity and temperature sensors; with white, green, yellow, red and blue signal LEDs and a buzzer. RS-232 communication. Uses an AVR ATmega8 microcontroller.

In my old apartment I built a lot of different LED lights.

Simple unit to silence the audible alarm on a production equipment, uses an AVR ATtiny2313 microcontroller.

RS-232 interface module, with 9 inputs and 9 outputs. Uses an AVR ATmega8 microcontroller.

Measures the power consumption by counting LED pulses from the home fuse box. Measurements can be read via a serial interface, uses the AVR ATtiny2313 microcontroller.