This document summarizes a project on creating a burglar alarm circuit using common electronic components. The objective is to ensure security of property using a device that monitors for burglary attempts using a light dependent resistor, variable resistor, LED, IC 555 timer chip, and 9V battery connected on a breadboard. Diagrams of the circuit and its working principle are provided, along with components used and conclusions about home security being an important growing field with technological advances improving efficiency of alarms over time.

1. Project On Burglar Alarm
By
O You tube : Angel Synthiya
O FB: synthiyaislam@gmail.com
O University of Liberal Arts Bangladesh

2. Objective
O Burglar alarms are automatic home
monitoring devices to monitor and
alert in case of a burglary attempt at
that place - house or a commercial
place.
O Our objective is to ensure security of
property using our device.

3. Components
O 9V battery with snap
O LDR
O Variable resistance 100K ohms
O Resistance 470 ohms
O LED
O IC 555
O Breadboard

4. Components

5. Circuit Diagram

6. Simplified Circuit Diagram

7. Working Principle

8. Practical Circuit

10. Conclusion
O Home security is rapidly growing field and
there are new & improved burglar alarms
popping up everyday.
O With rapid advancement of technology the
filled is turning out to be an area full of
scope and new changes can be made to
make it’s more efficient.
O It has years to come, because security is
of prime importance to one and all.

11. Thank You!!!