Light Dependent Security System

it is a security system easy to make not any complex soldering done
antitheft as any body open light the buzzer start buzzing

Step 1: Material Required

1.a switch
2.a 9v battery
3. a buzzer
4.a ldr
5.a some wire peices

Step 2: Make the Circut

take a 9v battery attach with buzzer and ldr as given in circut

Step 3: Make It Portable

take an old small box make hole for ldr and button design it u can put light also in the circut

Step 4: How It Works

place it in a dark room as any body opens light buzzer start buzzing
place anything on it if u say anybody not to take that thing and if it takes of the buzzer starts buzzing