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Eectronic watch/clock - HELP

Discussion in 'General Electronics Discussion' started by abi, May 9, 2012.

  1. abi

    abi

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    0
    May 9, 2012
    What woud be the most BASIC assembly of components;
    . 1] Power source;
    . 2] Counter (impulse every sec);
    . 3] Display LED;

    . 4] ?? means of connecting to the 'Gov'mnt clock'

    Could these components be obtained via a outlet like 'DIGI-KEY'?
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    We need more specific info to be understand the question:

    Where do the impulses for the counter come from?
    What is a 'Gov'mnt clock?
    What is the LED supposed to display? Do you really mean a single LED or an LED display (e.g. 7-segment, how many position?)


    Look up DIGI-key's catalog. it will tell you whether these components are part of their product line.

    Harald
     
  3. BobK

    BobK

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    Jan 5, 2010
    The way to build a digital clock now is with a microcontroller. It can do everything needed with only a handful of other components necessary, i.e. the display itself, 4 transistors or a darlingon array for digit drivers, a crystal for timing, a few resistors, and some switches for setting the time.

    There are also modules available that can connect to the WWV time radio signal which could be connected to the microcontroller as well.

    Bob
     
  4. abi

    abi

    3
    0
    May 9, 2012
    Harald Knapp;
    Thank you for the response.

    The reason the note was so skimmpy on details; I know absolutely ZERO!

    I would appreciate any help you can provide ...
     
  5. abi

    abi

    3
    0
    May 9, 2012
    BobK;
    Thank you, for taking the time.

    Your note was 'chock-full' of info, (for me) .
    Where would I find more info on the WWV system?
    Why couldn't it be used to 'DRIVE' the system?---> microcontroller ?
     
  6. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    Sorry, without further information, as requested, I'm unable to help.

    Harald
     
  7. BobK

    BobK

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    Jan 5, 2010
    I meant to say WWVB, which continually broadcasts the time in a binary format.

    Starting point is here:

    http://en.wikipedia.org/wiki/WWVB

    First of all, if you are not in North America, this is useless to you,

    Secondly, you need a microcontroller to decode the signal and display it as digits.

    Thirdly, WWVB only transmits the time once per minute, and it cannot be reliably recieved all the time in all locations, so it is used only to synchronize a clock that runs by itself in between synchronization.

    Bob
     
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