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.
3 Responses to “DIY Audio Spy Laser”
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Very interesting device, if does work like they say it would be pretty cool, kinda
creepy though.
seems to work from a video i’ve seen, although the audio seems very low, maybe an op-amp would help
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