A two channel thermometer. The bars show the temperature with 2.5°C per LED. If only one sensor is applied both displays show the same.

This is the bigger brother of the Temp-p-clock. It has a 128x64 pixel display with a touchscreen. Read more

One basic need of a computer scientist is to measure the power that a USB device drains off the PC.

For some areas like medical equipment or test equipment it is required to galvanically insolate the peripheral from the PC. This little device serves this purpose.

This is the third and final galvanic insulator in my little series. It provides an insulated UART with TTL levels. It was tested up to 256K baud.

This is a micro Tetris.

It features a fully functional Tetris programmed in C with the free TI Code Composer Studio.

My UV exposure frame for making PCBs did not have a timer, so I built a little one and included it in the housing.

This is a little weather monitor. It has a 2.2" color display and is powered by an AVR and the ESP8266.

This is a prototype that implements the concept of a physical progress bar. It is based on a motorized studio fader that is connected to a microcontroller. Read more

This is a Walnut I found some while back. It has a shell that is made out of three parts instead of two.

In order to do something completely different than usual I got myself some Agar-Petri-dishes and sterile cotton sticks to grow some bacteria.

A very handy tool that I built during my apprenticeship and still work with. This shows the quality of hand made tools as it is still sharp and works as well as on the day it was made ~1999.