Micro:bit Physical computing guides:
No. 2: PIR motion sensors

​​Connecting a PIR motion sensor to a micro:bit
Instructions on how to attach a PIR motion sensor to a BBC micro:bit.

What you will need
  • BBC micro:bit
  • Micro USB cable
  • Battery pack with 2 x AAA batteries
  • 1 x PIR motion sensor
  • 3 x Crocodile clip leads​
PIR motion sensor

Wiring instructions
  1. Disconnect the micro:bit from your computer and disconnect the battery pack.
  2. Using the crocodile clips, connect the positive (+) pin of the sensor to the 3V pin, the negative (-) pin of the sensor to GND, and the signal pin of the sensor to Pin 0 on the BBC micro:bit. 
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​Programming your PIR
Copy the below:
To access the 'Pins' blocks, click on 'Advanced'.
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​Testing your code
  1. Download your program to your micro:bit.
  2. Reconnect your battery and run your program.

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