his circuit helps us to get alerted when anybody picks our pockets or
bags. The circuit is very helpful to prevent our goods getting pick
pocketed. The circuit is called a pull pin security alarm because it gets activated as soon as the pin is pulled.
The arrangement of the circuit is as
follows. The circuit has a pin which is fixed to the pocket and the
other end is attached to the circuit. The circuit remains inactive until
the wallet is in your pocket as the circuit gets activated when the
wallet is pulled from your pocket.
When the wallet is in the pocket, the
circuit has the pin attached thereby the circuit remains inactive.
Whereas when the wallet is removed from the pocket, the pin gets
detached from the circuit thereby the circuit gets activated. When the
circuit gets activated, the circuit turns ON the mini loudspeaker. The
mini loudspeaker is fed with an alternating signal of audio frequency.
This signal vibrates the loud speaker at an audio frequency so that it
is well heard to us.
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