In this project you’re going to create a simple circuit with an Arduino and PIR motion sensor that can detect movement. An LED will light up when movement is detected.
Watch the video below to see how it works
Introducing the PIR Motion Sensor
The PIR motion sensor is ideal to detect movement. PIR stand for “Passive Infrared”. Basically, the PIR motion sensor measures infrared light from objects in its field of view.
So, it can detect motion based on changes in infrared light in the environment. It is ideal to detect if a human has moved in or out of the sensor range.
The sensor in the figure above has two built-in potentiometers to adjust the delay time (the potentiometer at the left) and the sensitivity (the potentiometer at the right).
Pinout
Wiring the PIR motion sensor to an Arduino is pretty straightforward – the sensor has only 3 pins.
- GND – connect to ground
- OUT – connect to an Arduino digital pin
- 5V – connect to 5V
Parts required
Here’s the required parts for this project
Schematics
Assemble all the parts by following the schematics below.
Code
Upload the following code.
Do you have any questions? Leave a comment down below!
Thanks for reading. If you like this post probably you might like my next ones, so please support me by subscribing my blog and my Facebook Page.
