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TV remote

Discussion in 'General Electronics Discussion' started by Karthik rajagopal, Jul 8, 2019.

  1. Karthik rajagopal

    Karthik rajagopal

    191
    5
    May 9, 2016
    Hi all,
    I recently bought a set top box for my TV. It was provided with a separate remote other than the TV remote. The instruction manual of the set top box mentioned that the remote can be programmed so that we can use the unused buttons in it to control the TV's function so as to reduce the handling of 2 remotes. IMG_20190708_092110.JPG IMG_20190708_092128.JPG It is mentioned in the manual that if I press the volume button in my TV remote and an unused button in my set top box remote at the same time and hold them face to face (both IR transmitters facing each other) ,that unused button gets the function of the volume button and it also worked for me. My question is , how can an IR transmitter receive an IR signal from another remote for it to program itself ?
    From the above pic it is clear that it has only one IR transmitter and no receiver .
    How does that work ? Can a transmitter receive signals ?
     
  2. dave9

    dave9

    806
    188
    Mar 5, 2017
    Yes, an LED can be used as a light detection component. Often a transistor is involved to amplify this.
     
  3. Karthik rajagopal

    Karthik rajagopal

    191
    5
    May 9, 2016
    Thanks for the reply. Will this method give accurate results ?
     
  4. dave9

    dave9

    806
    188
    Mar 5, 2017
    Define accurate. It just has to work.
     
  5. Karthik rajagopal

    Karthik rajagopal

    191
    5
    May 9, 2016
    I tried to mean the perfect transmission of the heck decimal values ..but got the answer from your reply .Thank you !
     
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