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Need ideas for playing sounds at different times

Discussion in 'Electronic Basics' started by Joe, Jul 19, 2003.

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  1. Joe

    Joe Guest

    I am trying to play different animal calls at different times for a certain
    length of time each day. Say, the sounds come on for 60 seconds (which would
    be fixed) every 2, 3, or 4 hours, which would be switch selectable.

    I have a sony walkman, but it needs the play button pressed in order to play
    the tape, and then needs the stop button pressed in order to stop it.

    After the experiences I have had trying to get solenoids to work pressing
    buttons, I am looking for a more state of the art solution.
    Would a portable mp3 player work? I guess the ideal would be to use a
    relay or transistor as a switch and electronically turn on the player and
    then turn it off again. Even if I had to make up a separate black box with a
    timng circuit inside to connect to the player. Does anyone have any
    suggestions as to what type of player I may be able to adapt to this
    project?

    TIA,
    Joe
     
  2. Bob Masta

    Bob Masta Guest

    This sounds like a natural application for a PC. I suspect
    this can be done with minimal programming, by launching
    the Windows Recorder to play specific sounds in response
    to a timer. Maybe you can find a timer that can run from
    a batch file.

    If you don't have a good PC to dedicate to this, you might
    use an only junker (even the original 4.77 MHz PC/XT) to
    simply do the timing, and output control signals via the
    printer port to go to you Walkman via a relay or transistor
    switch.


    Bob Masta
    tech(AT)daqarta(DOT)com

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
    Shareware from Interstellar Research
    www.daqarta.com
     
  3. Joe

    Joe Guest

    Thanks Bob, this will be used in attics, crawlspaces and outdoors, so must
    be portable and battery powered. I think I am going to simply insert the
    tape, press the play button, and then use an oscillator, coupled to a divide
    by chip (cd4020?) to divide the number of oscillator pulses into the correct
    time interval and fire a oneshot to switch power to the player and start the
    tape turning for about 60 seconds. I'll have a 4 position dip switch to
    switch from the different outputs of the cd4020 to get the right time delay
    for my 'turn on' pulse to the oneshot.

    Thanks for the suggestjon,
    Joe
     
  4. Colubris

    Colubris Guest

    Hi Joe,
    Take a look at the 4060B - built-in 'oscillator' and divider on one
    chip. I made a simple circuit to do more-or-less the same thing using
    the 4060 - a 'squeaker lure' to draw in predators to my automatic
    cameras. It uses a keychain voice memo recorder - but the tape player
    power could be switched just as easily.

    Arch
     
  5. DarkMatter

    DarkMatter Guest

    You could record "nothing" at low res onto mp3 tracks of hugh
    duration (hours), and then place the animal tracks in between tracks
    of nothing. The nothing tracks should compress so far as for this to
    be a doable solution. Then any standard mp3 capable player will do ya
    with a single button press, or constant replay. Offices use discs for
    their hold messages these days. Large blank spaces are the hard part.
     
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