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IR Remote Control

H

Harry Muscle

Jan 1, 1970
0
I'm trying to create a remote controlled volume control. The volume control
part is pretty simple, a digital pot. However, the IR part is a bit more
difficult for me. Here's what I'm hoping to do:

I program my universal remote to control a certain cable box (which one
doesn't matter to me, whichever one is simplest to decode and most universal
remotes support). Now when I press the Volume Up button, I would like my
circuit to increment the digital pot, meaning I need to have two signals
produced, one high to signal that I want to increment, and one transition
from high to low, to make the increment. When I press the Volume Down
button, I would need one low signal to tell the digital pot to decrease and
one transition from high to low to actually decrease the pot.

However, I have to clue how to decode IR remote control codes in order to
wait for that specific button press. Any help is greatly appreciated.

Thanks,
Harry
 
R

Randy Day

Jan 1, 1970
0
Harry Muscle wrote:

[snip]
However, I have to clue how to decode IR remote control codes in order to
wait for that specific button press. Any help is greatly appreciated.

Do you have access to a storage scope? Connect your
IR detector to it observe the pulse sequences from
different buttons on the universal remote of your
choice...
 
H

happyhobit

Jan 1, 1970
0
Harry Muscle said:
However, I have to clue how to decode IR remote control codes in order to
wait for that specific button press. Any help is greatly appreciated.


Hi Harry,

You got Formats and you got codes.

This explains Formats, at least the two most common, check out;

"Data Formats for IR Remote Control"
http://www.vishay.com/docs/80071/80071.pdf
From Vishay


For the actual codes do a Google for "IR Remote Control Codes". I got 163
hits.

Here is Sony’s IR Remote Control Codes" http://www.hifi-remote.com/sony/
 
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