At present we can see most of people try to tap telephone line.So this is the circuit to avoid that matter.If some one disconnect the line The unit which attach to the LOAD will operate
Parts:-
Q1 2N3904 Transistor or 2N2222
Q2 2N3906 Transistor
C1 0.47uF 250V Mylar Capicitor
Q3 IRF510 Power MOSFET
D1 1N914 Diode
R1, R2, R3 22 Meg 1/4 W Resistor
R4 2.2 Meg 1/4 W Resistor
MISC Wire, Phone Connectors, Circiut Board
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