Telephone: Cell/Mobile Phone Circuits - Detectors, Call Loggers
Mobile Phone Detector Circuits
Use these telephone circuits to detect incoming calls, call loggers, and more.
2 Comments - in Telephone
A very clever portable cell phone battery charger that uses 8x1.5 AA cells (batteries) to charge cell-phone / mobile phone batteries while mobile. No more need for a mains outlet!
5 Comments - in Telephone
A simple circuit that flashes an LED when a cell phone has an incoming call. Uses a coil to pick-up the signal emitted during an incoming call event. Cell phone call detector.
Cellular Phone Sound Effects
Easy to build sound effect generator kits, inludes several different sounds and tunes.
Outgoing Phone Number Logger Kit
Recorder all outgoing dialed numbers on your phone with this electronic kit.
0 Comments - in Telephone
Electronic circuit that connects to phone line and produces and flashing LED and audible sound when there is an incoming call.
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