Spy Circuits

spy circuits and projects

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Spy Telephone Schematic

January 9, 2010 ElectroSchematics.com 12 comments

This FM spy telephone circuit is mounted serrial with the phone line. When is signal on the wires this transmitter will radiate airwaves thru the wires wich act as anntenna. There is no need for batteries because it got his voltage supply from the phone lines.

There is no need for antenna too, the phone wires radiate all the radio energy. The transmision frequency can be set from the trimmers.
Have a nice spy!

spy circuits and projects

Spy Telephone Schematic

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