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Talking Clock

Discussion in 'Misc Electronics' started by w, Oct 1, 2003.

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  1. w

    w Guest

    Hi all

    I am after a circuit diagram for a talking clock.

    Most apreciated if anyone can help.

    Jay Mather
     
  2. CWatters

    CWatters Guest

  3. ------------------------
    Specify, how often do you want it to talk, or at a push of a button,
    or what?

    Go to:
    http://ourworld.compuserve.com/homepages/Bill_Bowden/homepage.htm
    and to:
    http://ourworld.compuserve.com/homepages/Bill_Bowden/dclock.htm

    and then use the numeric outputs to locate a memory block in an
    EPROM or several, add a counter for making it talk, and then record
    in your speech and burn the EPROMs. Run the 8 data lines of the EPROM
    to an R-2R ladder DAC, and then to an amp, like an LM386 and speaker.

    http://www.armory.com/~rstevew/Public/R-2R_DACs/EpromOsc.gif
    http://www.armory.com/~rstevew/Public/R-2R_DACs/WavProm.gif

    If you want to be fancy you could make the numbers all separate memories
    and cue them with a counter chain doing the talking-addressing using
    the digit numerics as positioners in EPROM address space. If you wanted
    to be fancy you could use an SPO256 and feed it numeric codes using
    an EPROM and counter string, but the EPROMs already there, so why
    waste one of them on such a trivial task. If you like the robotic
    sound, you could record the SPO256 into the EPROM.

    You can play any 8 bit mono .wav file that way by burning it into an
    EPROM. The header is a tiny blip on the start of a wav file, that can
    be edited off with CoolEdit or such, but it works without doing that.

    -Steve
     
  4. John G

    John G Guest

    There are numerous Talking clocks and watches on the market .
     
  5.  
  6. John G

    John G Guest

    No it is not what he asked for but he has not been very specific.
    I do not know enough detail to argue with what you suggested but it could
    easily be way out of his grasp and he may really only need a talking clock
    and not a very complex design and construction project.
    I only suggested an alternative.
     
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