Introduction: Light Sensor Circuit/Burglar Alarm

Picture of Light Sensor Circuit/Burglar Alarm

It is a Light Sensor Circuit.With little modifications it can be turned into Burglar Alarm Circuit.

Step 1: Components Required

Picture of Components Required

Step 2: Basic Circuit

Picture of Basic Circuit

Principle:The buzzer rings as long as light falls on LDR.but when LDR comes into darkness the alarm stops.

Step 3: Practical Circuit

Picture of Practical Circuit

Connections are shown in the basic circuit previously


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