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Binary Clock alterations for Australia (i.e. 50Hz power)?

Discussion in 'Electronic Basics' started by Al Dyne, Aug 19, 2003.

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  1. Al Dyne

    Al Dyne Guest


    I have found a schematic for a binary clock at . But the problem is
    that the CMOS 4040 is being used to count the 60 Hz power from the US.
    I have looked and looked on the internet, but can't seem to figure
    out if it is possible for the clock to work on the Australian power
    supply (it is 50Hz). I thought that if you changed the connections on
    the pins (for 60Hz it is pin 2,3,5 & 6) then it would work, but I
    can't seem to figure out which pins I would use for 50 Hz?

    Can anyone help me?


  2. Bill Bowden

    Bill Bowden Guest

    Just use pins 2,3 and 7 of the 4040 to decode 50 and tie the extra
    NAND gate input to +V. There is a drawing and instructions for
    using the 4040 counter and NAND gates to divide by various numbers

    The clock schematic at CSGnetworks was pirated, and I don't think it
    exists anymore. The original is located here:

  3. Bill Bowden

    Bill Bowden Guest

    My mistake. I thought that pirated drawing had been taken down,
    but looks like it was recently put back up at this address:

    They copied the schematic, replaced my name and date with
    the company logo, and then backdated it to 1994.

    (Computer Support Group 12/6/1994).

    The original has my name and date (3/30/02) in the lower left
    corner, same place where the CSG 1994 logo is now. These guys
    just take what they want, erase the author's name, and then
    claim copyright to it.

    Original is here:
  4. Al Dyne

    Al Dyne Guest


    Many thanks for that information, I am currently building it. I am
    afraid that it might take me a while. And I dont' really know how
    well it will turn out, as I am not using a Circuit Board, I am using
    lots and lots of wires. and if that doesn't work, I might think about
    getting a PCB printed out somehow.

    Thanks again,

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