Starter Guide

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Lesson 14 PIR control led
Introduction
In this lesson, let’s learn how to control a LED with PIR Sensor.
PIR Sensor：
The sensor has the markings "OUT", "-" and "+" (for output, GVD and +3.3
V).
PIR sensors will respond to animals such as cats and dogs, as well as
humans and other heat sources.
When a motion is detected by PIR sensor, the value of the output end will
rise.
S
Digital output
3.3V
3.3V
-
GND
Operating steps
1. First, we need to prepare the following experimental materials:
1 * microbit
1 * microbit expansion board
1 * USB cable
1 * PIR Sensor