Motion detector circuit / Muhd. Yusuf Syafiq Rozani & Muhammad Naqiuddin Azmi

The motion detector circuit is actually a circuit that detect physical object intrusion on its sensor. In this project the sensor used is the infrared sensor which is consists of the light emitting diode and a photo transistor (LDR).The light emitting diode which produces an infrared light to the phototransistor. Thus, if there is any intrusion or any object pass through between the lines of light, the circuit will energized the output. In this project the circuit cover the security purpose by acting as an alarm circuit with the infrared light as the transmitter the light to the sensor. Therefore the circuit have to be setup properly to achieve a good result in producing the alarm sound in good sensitivity. The circuit have two parts which consist of the transmitter with light emitting diode (LED) at the end and the receiver part with the phototransistor act as the switch or trigger. The output for this circuit is two, which are LED at the receiver part act as indicator light and buzzer. The projects are conduct and have been successfully operate.