RimstarOrg | Laser Communicator to Photoresistor/Photocell @RimstarOrg | Uploaded 9 years ago | Updated 12 hours ago
Using my homemade laser communicator so transmit sound to a photoresistor/photocell. This is instead of sending to a solar cell as I'd previously done.

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The photoresistor can be bought here:
http://www.adafruit.com/products/161
Note that it's been pointed out in the comments that much, much cheaper photoresistors that are suitable for hobbyists can be found on places like http://ebay.com. In my case I bought it from Adafruit as a fun additional item to play with while I was also buying other things (Arduino, servos, ...).

Some more explanatory calculations to do with voltage ranges can be found on my webpage here:
http://rimstar.org/science_electronics_projects/laser_communicator_to_photoresistor_photocell.htm

See also:

How to Make a Laser Communicator (to Solar Cell)
http://www.youtube.com/watch?v=yZ7PrWUVWP8&list=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h

Transmitting Sound using Sunlight - The Photophone
youtube.com/watch?v=Kc9Mjzfowcs&list=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h

Pinhole Camera - How to Make
youtube.com/watch?v=0Bx8P4EvYLA&list=PLFsZmHTZL-zn3jrI0X0e0aRijWlyvfg8h

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Music used throughout:
Decisions Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
http://creativecommons.org/licenses/by/3.0
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