Arduino Geiger Counter

This project involves a Geiger counter that is connected to an Arduino with an ethernet shield. The Geiger counter is a working analog board that is available at

http://www.goldmine-elec-products.com/prodinfo.asp?number=C6979



This is based on an idea by ibtek who has kindly provided me with answers to questions I had.

http://ibtek.wordpress.com/2011/04/02/diy-geiger-arduino-pachube-device/

The way to get the signal into the Arduino is to replace the LED with and opto-isolator and then to trigger an interrupt on the Arduino when a count is detected.