Chapter 23 Infrared Motion Sensor
In this chapter, we will learn a widely used sensor, Infrared Motion Sensor.
Project 23.1 Sense LED
In this project, we will make a sense LED, with the human body infrared pyroelectric sensors.
When someone get close to the LED, it will light automatically. On the contrary, it will be out.
This infrared motion sensor is a kind of sensor which can detect the infrared emitted by human and animals.
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