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simple help..4-6 inch tall minute clock.

Discussion in 'Misc Electronics' started by Brandon, Oct 4, 2003.

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  1. Brandon

    Brandon Guest

    Apologies if off topic, but I have searched google and found
    nothing...Perhaps someone here can lead me in the right direction...
    I am looking for the following...an LED or LCD minute clock ( just 2 digits)
    4-6 inches in height and is high visibility, prefer AC power.

    Perhaps a link to a kit or schematic so that I can build it myself.

    Thanks for any info.
    Brandon
     
  2. Digikey makes large LEDs of about 5" that come in red or green, CA or
    CC. They're not cheap at US$38.70 each. Then all you need is a few
    logic IC's or a microcontroller and some drive power of 40 to
    60mA/segment continuous or PWM'd at up to 180mA/segment. Some cheap
    transistors and resistors would take care of the LED driving. I would
    use a microcontroller such as a PIC rather than fuss with discrete
    counter and decoder chips, but I'm prejudiced like that. ;-) For a
    power source, I recommend you use a regulated wall wart that's capable
    of putting out about 10W (5V at 2A).

    michael
     
  3. Brandon

    Brandon Guest

    Thanks for the replies folks. I appreciate your time and efforts
    Brandon
     
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