http://www.diylive.net Do-it-yourself projects and technology updates Mon, 16 Jun 2008 16:02:20 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 http://www.diylive.net/index.php/2007/08/20/diy-audio-spy-laser/ http://www.diylive.net/index.php/2007/08/20/diy-audio-spy-laser/#comments Mon, 20 Aug 2007 14:00:24 +0000 Greg Lipscomb http://www.diylive.net/?p=281 Alen from hackedgadgets.com wrote about this laser listener device. A microphone is simply a diaphragm that vibrates with sound waves. The theory behind this device is that when people are talking in a room, the window will vibrate. If you shine a laser on the window, it will bounce off with the same vibrations. Using a cadmium sulfide photo voltaic cell connected to a stereo plugin, the laser can be converted to sound recordings. View this cool DIY project here.

]]> http://www.diylive.net/index.php/2007/08/20/diy-audio-spy-laser/feed/ 7