Difference between revisions of "IR Transmitter and Receiver Kit"

Revision as of 08:32, 30 May 2012

Introduction

IR Transmitter

IR Transmitter is a Arduino breakout for a simple and clear infrared LED on it. These Infrared lED operates around 940nm and work well for generic IR systems including remote control and touch-less object sensing. Pair them with any of our IR receivers.

IR Receiver

IR receiver is a breakout board with IR detector mounting on it.IR detector is little microchips with a photocell that are tuned to listen to infrared light at 38KHz. They are almost always used for remote control detection - every TV and DVD player has one of these in the front to listen for the IR signal from the clicker.

Specification

• Power Supply:5V
• Interface:Digital
• Modulate Frequency:38Khz

Applications

• Remote control
• TV control
• Air conditioning control

Document

IR Remote library

Usage

The IR LED on the transmitter module keep on sending hexadecimal code A90 as the modulated IR signal at 38KHz. (More information about how IR LED and detector works ,please vsit Ladyada.com) The IR detector on the breakout detect the IR signal at 38KHz and demodulate it. You can read what the transmitter send on the serial monitor.

Note

Infrared Led on the IR transmitter module should be directed at IR detector on the receiving board for signal reception.

If the infrared LED is not directed well at the IR detector, the IR detector on the receiving board cann't detect the modulated IR signals well and it will cause the decoded signal incorrect.

Example code

Transmitter

#include <IRremote.h>
IRsend irsend;
void setup()
{
 Serial.begin(9600);
}
void loop() {
   for (int i = 0; i < 50; i++) {
     irsend.sendSony(0xa90, 12); // Sony TV power code
     delay(40);
   }
 }

Receiver

#include <IRremote.h>
int RECV_PIN = 11; //define input pin on Arduino
IRrecv irrecv(RECV_PIN);
decode_results results;
void setup()
{
 Serial.begin(9600);
 irrecv.enableIRIn(); // Start the receiver
}
void loop() {
 if (irrecv.decode(&results)) {
   Serial.println(results.value, HEX);
   irrecv.resume(); // Receive the next value
 }
}

How to buy

Click here to buy IR Transmitter Module and IR Receiving Module