Simple Pir Sensor Circuit Diagram

By | September 3, 2017



Pir sensors (passive infrared sensors) are devices that use infrared light waves to detect motion. A simple pir sensor circuit diagram can be used in various types of home-based security systems and automation projects.

For any DIY enthusiast, setting up a simple pir sensor circuit can be a daunting task – especially if they’re not very familiar with electrical components. However, armed with the right information and a little bit of know-how, anyone can set up a pir sensor circuit that is reliable and effective.

To begin, the first step is to gather the necessary components. You’ll need a breadboard, jumper wires, an IC7805 voltage regulator, a 12v power supply, an NPN transistor, and a PIR sensor module. Once you’ve got all the components ready, you’ll need to create the circuit according to the diagram.

To do this, you’ll need to connect the 12v power supply to the IC7805 voltage regulator. Then, you’ll need to connect thePIR Sensor Module to the voltage regulator. Finally, the transistor will need to be connected to the voltage regulator and then scavenged to the ground through the red wire.

Once everything is in place and connected correctly, you can test the circuit by flipping the power switch on the 12v supply. When the switch is flipped, the transistor should be able to detect the infrared radiation emitted from the PIR sensor and activate the buzzer that is connected to it.

The end result is a simple yet effective pir sensor circuit that can be used as a part of any home security system or automation project. With a little bit of patience and the right components, anyone can set up a pir sensor circuit that is reliable and effective.


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