Thanks to the hard work of Ken Shirriff over at http://www.arcfn.com/2009/08/multi-protocol-infrared-remote-library.html I am having great fun playing with infra red remote control.
I would like to document my experiences as well as what I have gleaned from it.
Main notes:
The IR receiver needs to have a connection to +5v, gnd and the output goes to digital pin 11 (hardcoded into the library).
With my particular IR receiver it looks like this:
I found that the IR transmitter needs to be amplified to allow the equipment to detect the IR signal, I am using a bc547.
My amplifier circuit looks like this:
arduino digital pin 3 — 120 ohm resistor — bc547 pin 2 (base)
bc547 pin 1 (collector) — IR LED cathode (short pin/negative/flat side) –IR-LED– IR LED anode — +5v
bc547 pin 3 (emitter) — gnd
————
Placeholder
coming soon: networked remote control code for ethernet/SD header
————
Important notes:
* when sending RC6 IR signals each alternate emulated button press needs ORing with 0×80000 (setting the toggle bit) or the code will be ignored by the receiver.
* Send the signal at least twice with a delay(50); between them to ensure the receiver receives and processes the signal.
* If you transmit a signal and need to receive a signal, reinitialise the receive code every time or the IR receiver will not work (I have been led to believe this by a comment on the arcfn blog)
* In testing, replace the IR LED with a normal LED so you can see if the circuit is transmitting
—————————-
9 January 2012 update:
<?php
$p = $_GET['command'];
$device = "/dev/ttyACM0";
exec("echo $p > $device");
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And the images:
I will be watching this site since I have an interest in doing what you are attempting. However, so that others can replicate your project, it would be good if you posted the part number of the IR receiver that you are using.
Thanks
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Hi Joe
Thanks for replying.
The part has the markings “Y908A 36A” and is functionally equivalent to http://www.vishay.com/ppg?81745 TSOP31236 from what little I can determine.
I will be updating the post regularly – I just bought myself a notepad to jot down information and keep it all tidy.
Today I will be adding a new post explaining how to get Processing working in ubuntu linux with an arduino UNO, which sets the serial port name to /dev/ttyACM0 (or /dev/ttyACM*) when attached to the USB port.
Stay tuned :)
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