http://www.youtube.com/watch?v=EzXb-15rzK8

This is a working arduino geiger counter assembled from the exact set of parts which I have photographed in previous posts. Here it is working connected to computer. This is to demonstrate how the detector part works togeather with the Arduino part. In addition to flashing the LED and sounding the buzzer when Ionizing nuclear radiation particle is detected by the geiger tube SI29-BG, it also runs a counting program on the atmega328p processor and sends data through serial port to computer.