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infra red

Discussion in 'Hobby Electronics' started by Grange, Dec 21, 2011.

  1. Grange

    Grange Guest

    I have a universal remote. When the batteries get low, one of my devices
    still responds to the remote, but another device doesn't.

    What would be the cause of this? I assume there is the same amount of
    electricity going to both devices since they both plug into the wall. Could
    it be that the infra red receiving unit in one of the devices is simply of
    lower sensitivity than the other one?
  2. DA

    DA Guest

    responding to
    DA wrote:

    Learning something new every day. Ultrasonic remotes? Never heard of this
    type until today. Turn out that's how they flipped channels in the 70s :)
    I wonder if some fine tuned whistles could also work on those? Like a 70s
    version of TV-be-Gone?
  3. keithr

    keithr Guest

    I used to enjoy walking through the local David Jones TV department
    jangling a bunch of keys, watching their display TVs switch to random
  4. F Murtz

    F Murtz Guest

    the squeak of closing blinds used to switch them off.
  5. Phil Allison

    Phil Allison Guest

    "Rheilly Phoull"

    ** Nothing wrong with that - just follow the cable to find the lost remote

    The one fitted to mid 60s Krieslers had brightness, volume and channel
    up/down - it even had a small speaker for private listening ( like a drive
    in ) and a mini jack for an earpiece.

    The turret tuner in the set was driven around by an AC motor and stopped at
    pre-set positions, each channel had its own fine tune control. On the front
    panel were 12 indicator lights to show which VHF channel was on.

    Channel surfing during commercials was brilliant innovation.

    .... Phil
  6. F Murtz

    F Murtz Guest

    Threw one of those out three weeks ago when moving (manufactured just
    about when they stopped using valves)
  7. JW

    JW Guest

    Were those the remotes that had tuning forks in them? I remember having
    one of those, but I didn't think they were ultrasonic.
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