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IR Remote Control

Discussion in 'Electronic Basics' started by Harry Muscle, Jun 10, 2004.

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  1. Harry Muscle

    Harry Muscle Guest

    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
     
  2. Randy Day

    Randy Day Guest

    Harry Muscle wrote:

    [snip]
    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...
     
  3. happyhobit

    happyhobit Guest


    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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