Auto Burglar Alarm:
This alarm circuit is based on two555
Timers. The alarm will sound your car
horn if anyone opens the car door while
the circuit is armed
Let’s build a
burglar alarm using a parallel circuit.
This simple burglar alarm really works.
You can use it to watch over the windows
and door in your room
An open circuit
system, the alarm goes off when there is
a trigger. The next choice is a buzzer
to sound the alarm so that you know
there is a burglar!