Monday, June 26, 2006

Cell Phone

Cell-Phone-Controlled Audio/Video Mute Switch:

Cellular Phone calling Detector: Flashes a LED when detecting an incoming call. Powered by one 1.5V cell

Cordless Phone Backup:

Dualvoltage Supply Powers SIM Card: 01/20/00 EDN-Design Ideas / PDF contains multiple circuits - scroll to find this circuit.

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