Introduction
An infrared-receiver is a component which receives infrared signals and can independently receive infrared ray and output signals compatible with TTL level. It’s similar with a normal plastic-packaged transistor in size and it is suitable for all kinds of infrared remote control and infrared transmission.
Components
– 1 * SunFounder Uno board (or SunFounder Mega2560 board)
– 1 * USB cable
– 1 * Infrared-receiver module
– 1 * Remote controller
– Several jumper wires
Experimental Principle
Control a certain key (for example, Power key) via a remote controller by programming. When you press the key, infrared rays will be emitted from the remote controller and received by the infrared receiver, and the LED on the SunFounder Uno board will light up.
Experimental Procedures
Step 1: Build the circuit
| Infrared-receiver module | SunFounder Uno |
| S | 2 |
| “-” | GND |
| + | 5V |
Step 2: Program (Please refer to the example code in LEARN -> Get Tutorials on our website)
Note: Here you need to add a library. Refer to the description in Lesson 4 previously in the manual.
Step 3: Compile the code
Step 4: Upload the sketch to the SunFounder Uno board
Now, press the Power key of a remote controller, and the LED attached to pin 13 on the SunFounder Uno board will light up. Then press any other key, and the LED will go out.
Code
| /*********************************************** * name:Infrared-Receiver * function:press the Power key of a remote control, * and both the LED attached and that connected to pin 13 on the SunFounder Uno board will light up. * Then press any other key, and the LEDs will go out. **********************************************/ //Email: support@sunfounder.com //Website: www.sunfounder.com#include <IRremote.h> const int irReceiverPin = 2; //ir receiver module attach to pin2 const int ledPin = 13; //pin 13 built-in led IRrecv irrecv(irReceiverPin); //Creates a variable of type IRrecv decode_results results; void setup() { pinMode(ledPin,OUTPUT); //set ledpin as OUTPUT Serial.begin(9600); //initialize serial monitor irrecv.enableIRIn(); //enable ir receiver module } void loop() { if (irrecv.decode(&results)) //if the ir receiver module receiver data { Serial.print(“irCode: “); //print”irCode: “ Serial.print(results.value, HEX); //print the value in hexdecimal Serial.print(“, bits: “); //print” , bits: “ Serial.println(results.bits); //print the bits irrecv.resume(); // Receive the next value } delay(600); //delay 600ms if(results.value == 0xFFA25D) { digitalWrite(ledPin,HIGH); //turn on the led } else { digitalWrite(ledPin,LOW); //turn off the led } } |