Circuit Hack – How to Make a Radiation Detector Geiger Counter! [http://zedomax.com/blog/2010/04/12/circuit-hack-how-to-make-a-radiation-detector-geiger-counter/] - 2011-08-05 03:34:23 - public:time counter, diy, geiger, project, radiation - 5 | id:2622 -
