Geiger counter using phone's camera and a piece of paper(hackaday.com)
hackaday.com
Geiger counter using phone's camera and a piece of paper
http://hackaday.com/2012/01/15/turn-your-camera-phone-into-a-geiger-counter/
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http://hackaday.com/2012/01/15/turn-your-camera-phone-into-a-geiger-counter/
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