working principle of luggage security system

[jaseela123d]

During our journey through train and bus, we carry many important things and all the time we have fear that someone might lift our luggage. So to protect our baggage, we normally lock our baggage through old ways by the help of chain and lock. After all locks, we still remain in fear that someone may slash the chain and take away our valuable material. To overcome with these fear, here is an easy circuit which is based on the NAND gate. In this circuit, when someone tries to lift your luggage, it will generate a warning alarm which is very much helpful during your travel in the bus or train even at the night time as it can also produces audio visual indication attached to the relay.

Another application of this circuit is that you can employ these into your house so to avoid the attempt of robbery in your house with the help of this alarm circuit. When anyone tries to open the door of your house, loop break down and sound from the alarm produce.


Circuit Components:

IC
IC1(CD4011) – 1
Resistor
R1(1K) – 1
R2(4.7K) – 1
Capacitor
C1(.1uF) – 1
Miscellaneous
Relay – 1
T1(BC547) – 1
D1(1N4007) – 1