Control an external device using IR

Projects General Guidance
1

Hi there,

I need to be able to turn an amplifier (Harmon Kardon) on and off using from my Arduino.

I think that the easiest approach would be sending an IR signal to the amplifier.

My question is what components I need to accomplish this. What do I need in order to send an IR signal from the Arduino?

I assunme that I need some sort of an IR receiver in order to read what signal the original Harmon Kardon remote emmits when the power buttpn is pressed and ofcourse also spme sort of IR-emitter to be able to turn the ampfier pn and off frpm the Arduino.

Any suggestions/tips ar really appreciated...

:slight_smile:

2

Yes. Usually, IR remotes send a binary signal modulated on a base frequency, often 38kHz, AFAIR.
There are ready made IR receiver that do all the work with the base frequency and give you the binary signal.

There are these kits, they are cheap, so why not go with them, but they are not much more then the mentioned components on a board. If you want to shrink your stuff down, just get the receiver and an led and some current limiting/pull-up/down resistors:http://www.aliexpress.com/item-img/1sets-Digital-38KHz-Infrared-IR-Sensor-Transmitter-Kit-for-Arduino/32368989420.html?spm=2114.10010108.1000017.2.yL5WEE

There is also the IRremote lib that deals with the signal and is able to send signals over an LED.

That said, this works with most modern things, but not with all, and not with all older once. A had no luck decoding my Technics stereo, or my Acer projector ...

3

Maybe this tutorial will help.

Leo..

4

Thank you for your help. I'll try that...

Looks like it is a project that I can handle.