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Simple PIR motion sensor circuit

Motion sensor circuit simple

 Needed
PIR motion
LED
1K resister
BC547 transistor
12 v battery or power pack
1N4007 diode

 Now the time for circuit design

The led was blink when the motion detector detects some think.

 Motion detectors range

 Up to 10 meters at an angle of ± 15 degrees. The PIR (Passive-Infrared) Sensor functions in the same way as an outdoor light with a motion detector and reacts to movements made by objects that radiate heat (people and animals). The switching threshold can be set from between 0% and 100%.

 How the motion detector working

 There are two popular types of passive motion sensor. These are mostly found in residential homes. Passive infrared motion detectors (PIR) detect emitted infrared energy = given off by humans and animals in the form of heat. When there is a sudden increase in infrared energy, an alarm is sounded.

 Resistor working method

 Devices called resistors let us introduce precisely controlled amounts of resistance into electrical circuits. ... Photo: A typical resistor used in an electronic circuit. It works by converting electrical energy into heat, which is dissipated into the air

 1N4007 diode

 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Values are at TA = 25°C unless otherwise noted.

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