Digital Clock Power Supply Selection

Discussion in 'The Projects Forum' started by Triaca, Dec 16, 2012.

  1. Triaca

    Thread Starter New Member

    Dec 15, 2012
    I am making DIGITAL CLOCK in which i m using
    1. 6 74LS90(BCD counters)
    2. 6 74LS47(Decoders)
    3. 6 7seg Display(common anode)
    4. 6 74LS08 n 74LS32( AND N OR GATES)
    5. 1 555 timer IC
    according to datasheets of the ICs, i require 5±0.25V n 1-16mA current range for the operation, suggest which power supply would be appropriate?
  2. ScottWang


    Aug 23, 2012
    Triaca likes this.
  3. Wendy


    Mar 24, 2008
    Or you could get a cell phone power supply, depending on where you are getting your clock from. If you looked at the thread I pointed you to I had a fairly cheap crystal oscillator/divider that would provide a 1 Hz source. There are many ways to buy 5V DC wall warts.

    PS: Please stop posting 2 threads on the same subject, you are just creating more work for the moderators, and it will not work.
    Triaca likes this.