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Monday, January 18, 2010

Telephone Spy unit circuit


This is telephone spy unite.You can transmit signals up to 200feet.This circuit operates with 88-94MHz.This circuit doesn't want extra power it uses the power of the line.





Note

# If the LED burning out as a problem of your circuit, add a 300 ohm 1/4W resistor in series with it

3 comments:

Unknown said...

plz tell me what does it mean
in 1 in 2
out 1 out 2
and
how make antenna ?
thnx

Zam said...

in 1 in 2 mean line in of the telephone.

out1 out 2 mean line out of the telephone
Because we cant disconnect the line so we get the signals in and re connect the line

Zam said...

in 1 in 2 mean line in of the telephone.

out1 out 2 mean line out of the telephone
Because we cant disconnect the line so we get the signals in and re connect the line

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