> For the complete documentation index, see [llms.txt](https://longer-vision-robot.gitbook.io/arduino-full-stack/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://longer-vision-robot.gitbook.io/arduino-full-stack/04_infrared_sensors.md).

# Chapter 4. Infrared Sensors

In this chapter, we are going to use several examples to demonstrate how to control infrared sensors, including the IR emitter and IR receiver.