Make: Online : Light to sound converter circuit

Light to sound converter circuit

Lighttosoundconverter
From the MAKE: Flickr pool

5Volt shares info, schematic and video on this simple yet fun/interesting project -

This is my simple light to sound converter. It simply converts light variations into sound. Listen to remote controls, TVs, burning flames, light bulbs and anything that emits either visible or infrared light.

Get more details on how to build your own from his blog - Light to sound converter

Comments

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Posted by: saimhe on January 6, 2009 at 1:25 AM

A portable version with headphones and detachable lens for a few meters range could be even better. Just imagine walking outside and peeking for any "concealed" amplitude modulation. A certain kind of people should immediately remember those ingenuous spies that were transmitting low-amplitude through an ordinary lightbulb directly visible from state border :)

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Posted by: Anonymous on January 6, 2009 at 11:29 PM

neat, but definitely been done before...
from 1996: http://amasci.com/freenrg/ufoscope.html

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Posted by: Collin Cunningham on January 7, 2009 at 5:16 AM

@[blank] - thnx for the link.
Just for the record, many projects we feature here aren't necessarily new but often they're "new to you" and that's always exciting ;)

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