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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 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.
  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).

  3. Brandon

    Brandon Guest

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