Lesson 9 IR Receiver Module

Introduction

An infrared-receiver (as shown below) is a component which receives infrared signals and can independently receive infrared rays and output signals compatible with TTL level. It is similar with a normal plastic-packaged transistor in size and is suitable for all kinds of infrared remote control and infrared transmission.

Required Components

– 1 * Raspberry Pi

– 1 * Breadboard

– 1 * IR receiver module

– 1 * IR Remote Controller

– 1 * 3-Pin anti-reverse cable

Experimental Principle

In this experiment, send signals to IR receiver by pressing buttons on the IR remote controller. The counter will add 1 every time it receives signals; in other words, the increased number indicates IR signals are received.

The schematic diagram of the module is as shown below:

Experimental Procedures

Step 1: Build the circuit.

Raspberry Pi	GPIO Extension Board	IR Receiver Module
GPIO0	GPIO17	SIG
3.3V	3V3	VCC
GND	GND	GND

For C Users:

Step 2: Change directory. 

    cd /home/pi/SunFounder_SensorKit_for_RPi2/C/09_ir_receiver/

Step 3: Compile.

    gcc ir_receiver.c -lwiringPi

Step 4: Run.

    sudo ./a.out

For Python Users:

Step 2: Change directory. 

    cd /home/pi/SunFounder_SensorKit_for_RPi2/Python/

Step 3: Run.

    sudo python3 09_ir_receiver.py

Press any key of the remote. Then you can see the LED on the module blinking, and “Received infrared. cnt = xxx” printed on the screen. “”xxx” means the time you pressed the key(s).