Pir Sensor Circuit Diagram Using Lm324. It can work on 5v but the voltage division created by r17 and r18 must be changed. The pir sensor is the heart of the project two stage amplifiers.
The following circuit shows the voltage comparator the components required for this circuit is the lm324 comparator and the two resistors with a value of 10k ohms. The figure below shows a project of a simple ir sensor circuit using lm324 ic. D204b pir sensor is used in this project.
The circuit will show visual indication by activated an led when any object is placed infront of the ir led and photodiode.
Pir sensor circuit explanation and schematic using the lm324n op amp the board can be powered from 5v to 12v however the value of the components are designed for 8v to 12v. Infrared alarm switch using the most popular domestic and international human pyroelectric pir sensor for the signal detector high sensitivity detection range up to 10 meters the depression angles of up to 86 horizontal viewing angle of up to 120. The signal from the pir sensor is very low so this signal is amplified by using lm324 lm324 is a quad op. Circuit diagram block diagram of the pir based security system pir sensor.
