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Making a Motion Detector using PIR Motion Sensor - KT956

Making a Motion Detector using PIR Motion Sensor - KT956


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A PIR Sensor is an electronic sensor that measures infrared light radiating from objects in its field of view. This type of sensor would be used as a motion or proximity sensor.

  • Long range
  • Wide angle
  • Low consumption
  • DC 3.0-5.5V power supplier




PIR sensors allow you to sense motion, almost always used to detect whether a human has moved in or out of the sensors range.

  • Input Voltage: DC3.0-5.5V
  • Current: 100uA(max)
  • Detecting distance: 9m(max)
  • Output signal: 0,3 VCC (Output high when motion detected)
  • Sentry Angle: 120°
  • Connector:3Pin 2.54mm pitch
  • SizeL36W26H21(mm)


PIR motion sensor




  • Connect the positive terminal of the battery to breadboard to make positive rail on the breadboard to provide the same connection.
  • Connect negative terminal of the battery to breadboard to make Negative rail on the breadboard to provide the same connection
  • Attach an led on the breadboard.
  • Connect led’s positive terminal to the output pin of PIR motion Sensor and led’s negative terminal to the ground pin of PIR Motion Sensor.
  • Connect VCC pin of PIR Motion Sensor to the positive supply on the breadboard.
  • When the PIR motion sensor detects the motion, led starts glowing.


Welcome to the Motion Detector Project which consists of PIR Sensor. You have to first make connections as given in the circuit connection. Then, power on the Arduino and wait for about 50- 60 seconds for your PIR sensor to calibrate. You may not instantly get the desired output during this period. But, in a while, try moving in front of the PIR sensor and your LED should be triggered as shown in the connection above. When PIR Motion Sensor detects the motion around its specified range, the LED glows. This project can also have many advancements in itself such as using Buzzer and LED simultaneously for the Motion Detector Project.


If you want to experiment a little with your PIR Motion Sensor Module or test it well, then you don’t even need an Arduino or Raspberry Pi.

All you need is either a power source, a resistor and a LED. The power can be drawn from either batteries or a power supply – 3 to 9 Volts can also work. In an optional manner, you can also use a 5V USB charger. For the LED, we need to pay attention, since it’s important that we connect the pins right. The longest pin (+ve terminal) should be connected to the resistor and the shorter pin (-ve terminal) should be connected with the GND.