touch switch alarm circuit diagram

The presented circuit is used as a touch switch alarm.  You can make this circuit safe by connecting it to your locker.  After connecting this circuit to the vault, the alarm will sound whichever person touches the vault.  This circuit is built using IC NE 555.  To generate alarm sound, we have used NPN transistor BC548 and PNP transistor BEL188 in it.  The list of components used in it is given below.
<img src="/imgs/touch-switch-alarm-circuit-diagram" alt="touch switch Circuit Diagram">
ic NE555 
TRA Q1
BC548 
Q2
BEL188
Resi 
R1 - 1m 
R2 -  220k
R3 - 10k
V/R  100K
Capacitor 
C1 100uf 25v
C2, C3  .01uf
Diode 
D1 1N4007 
Speaker 
PCB BORD

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Location: Ramala, Uttar Pradesh 250623, India

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