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
6 thoughts on “Light to sound converter circuit”
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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 :)
neat, but definitely been done before…
from 1996: http://amasci.com/freenrg/ufoscope.html
@[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 ;)