The project is designed as a security system based on photo sensing
arrangement. It uses a 14- stage ripple
carry binary counter to sense the light intensity through LDR. The output
drives a buzzer and a relay for necessary action. This concept is very useful
to deter burglars from banks, malls, jewellery stores and also in homes.
The system is based on an electronic eye: it is an LDR sensor, called
light dependant resistor. When light falls on the sensor, its resistance
drastically decreases which lead to triggering an alarm to alert the user. This
system best suits in the application of providing security for cash boxes and
lockers, which can be found in malls, jeweler shops, and banks. The circuit is placed
inside the cash box or locker in such a way that, when the burglar opens the
locker and uses a torch light to find the valuables, the light falls on the circuit
which contains an electronic eye (LDR) and gives a signal to the ripple counter.
This activates the alarm, and indicates a burglary attempt. Also a lamp is used
to indicate the theft when the light falls on the LDR.
Further the project can be enhanced by using a GSM modem and a
microcontroller. Gsm modem can be interfaced to the microcontroller to send an
SMS to the user in case of burglary.
No comments:
Post a Comment