post #1 of 1
10/23/08 at 12:36am
Thread Starter 
This device is simple to build , so anyone can make one . Sure , this device does not ring like conventional telephone , but with some modification , you could add some ring and a dynamo to power the ring while calling , but that is up to you .

http://www.instructables.com/id/Gree...ess-telephone/

This site is pretty cool. Lots of science fair project ideas here.
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