Infrared sensor for the smart home / Khairul Masmim Zambahari and Mohd Fairul Jaafar

Infrared sensor is a security system designed to detect the any movement by using the infrared sensor however, this single detection will not detect if the sensor fails such as breakdown or damage and the operation will not be operated. In this project, we can see how the infrared sensor is operates and also to make sure the objective of our project was successful. This circuit is to detect an object in front of the device ( door) without obstructing an IR beam. For this IR it should be pointed in the same direction as the IR module and at the same level. When the switch SI is in transmitter is ON, the current will flow into the circuit. Then the IR emitter will produce a signal (input). Then that signal (input) will pass into the receiver ( IR detector ). VR (100K Trimmer Pot ) should be adjust until the receiver detect the IR beam ( IR emitter). When there are nothing in front of the IR beam ( IR detector ), IR beam is not receiving any of signal, then the circuit will active. In other word, when something are crossing the line of the signal or blocking, the detector can't detect any signal, automatically the circuit will active. Then the relay will consist to be used to turn ON the buzzer. Then the buzzer will producing a output ( sound ).