Break burglar alarm circuit II

  
Ding for the circuit principle: care, vs SCR trigger grounded, it is in the off state. When someone leads A burglar broke, the SCR trigger end to give a trigger voltage is turn
Break burglar alarm circuit II - schematic

ed on, the oscillator complementary VT1 and VT2 and the like of electrical work, issued a beep sound. Meanwhile strobe light emitting diode LED is also due to thyristor energized and winking, inform someone to steal. S to disarm the alarm switch.




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