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Telephone Ringer Visual Alert (LED) [Project]
posted July 3 2014 7:46.37 by spic0m




A simple circuit from instructables user scd:

"I have a T-mobile@home analog phone by my desk and there are times when I want to turn off the ringer and use a visual alert instead so I designed a circuit to flash an LED when the phone rings. The circuit consists of a 1N4003 diode in series with an 8K resistor and a white LED."




[Link: instructables]
 
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