Pir Sensor Alarm Circuit Diagram. The circuit diagram to build a simple burglar alarm or an intruder alarm using arduino is given below. Pin1 pin2 and pin3 are corresponded to drain source and ground terminal of the device.
Here is a simple circuit that activates a relay alarm when a living being a human is detected by the pir sensor. Pin 1 is vcc which is connected positive 5v supply. The third idea below explains a simple pir motion detector alarm circuit which can be used for activating lights or an alarm signal only in the presence of a human or an intruder.
The pir sensor is the heart of the project.
Pin1 pin2 and pin3 are corresponded to drain source and ground terminal of the device. D204b pir sensor is used in this. Go through above tutorials before you try building this burglar alarm system using arduino. So um3561 activated and start producing sound with speaker.
