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Sicode Posted - May 25 2011 : 6:03:45 PM
Pebe, this is similar to what i was searching for.I will try and verify how it goes. any possibility? from here:

http://1.bp.blogspot.com/_RpOfkmvmOVM/TNV5cgurXEI/AAAAAAAAApU/0T64QuTaV-c/s1600/cellphone+call+detector+sch.png

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Sicode Posted - May 26 2011 : 01:05:17 AM
Audioguru, guru indeed. Tried the circuit overnight. Senses everything in the damned air, and nearly picks my voice. loooooool
audioguru Posted - May 25 2011 : 9:06:59 PM
The transistor is a widebnand amplifier so it will pickup mains hum, AM radio stations, FM radio stations, TV stations, taxi cab transmitters, police transmitters and hundreds of other transmitters including nearby cell phones that are ringing.

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