Motion detector alarms are sheer necessity in modern homes and offices. Motion detection sensors are used in such types of intruder alarms, security alarms. Here we have designed a simple demo motion detector security alarm which detects the presence of human being in the range of the detector and buzz an alarm when it founds the presence.
PIR(Passive Infrared) sensors have a lot of applications like used here in an automated staircase lighting. PIR sensor is used here and connected with a buzzer in the circuit. PIR sensors have a range of around 3 meters and when someone enters in its range it sends the signal to buzzer.
Here is the complete circuit - PIR sensor circuit diagram
You can build it more complex and usable by adding a microcontroller into it.
PIR(Passive Infrared) sensors have a lot of applications like used here in an automated staircase lighting. PIR sensor is used here and connected with a buzzer in the circuit. PIR sensors have a range of around 3 meters and when someone enters in its range it sends the signal to buzzer.
Here is the complete circuit - PIR sensor circuit diagram
You can build it more complex and usable by adding a microcontroller into it.
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