This module contains a micro SD card, 32Kbyte serial SRAM and an ATmega644 and has the size of a standard SD card.Obviously nowadays any modern CPU can easely drive a sdcard asside process. Read more

The device is built out of two servos. One provides the rotation and the other the tilt. It can be used for example to point at the date on a wall calender (sample below). Read more

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 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. Read more

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 little double sided PCB is a galvanic insulator for the popular Atmel ISP MK2.

After I had a little mishap with my Saleae Logic that ruined the analyzer and parts of my PC it was clear that some galvanic protection needed to be implemented. 

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

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

There are a lot of printer solutions on the market nowadays. Also the connectivity is excellent by enabling printers with WIFI.

The CPC (Chain Punch Counter) is an optical device for martial artists. It can count the so called "Chain Punches" - a technique from the Wing Tsun Kung Fu martial arts. Read more

I happened to find an old Game Boy camera on a jumble sale. The thing as such is not worth much, got it for a few bucks. But the image sensor can be used to make low-res pictures using a microcontroller with an ADC. Read more