• Casing and finished product

    Paul Kocyla02/21/2019 at 16:07 3 comments

    Here is the finalized product. Better than just standing in the shelf.
    And it feels good to know that the module is powered up and playing a role in the clock.

  • Board working

    Paul Kocyla02/16/2019 at 13:13 1 comment

    The Saturn-V LVDC clock is working.
    I ordered an acrylic window which will fit over the display. The one I have is too small. It will make the numbers look better.
    I´ll put the clock into a wooden case so it can be hung on the wall.

  • Clock Board

    Paul Kocyla02/07/2019 at 12:01 0 comments

    Here´s the PCB layout of the clock with the interface to the LVDC module:
    The parts are mounted behind the 1-inch 7-segment displays.
    The circuit is based on the schematic by danyk666, it´s a classical counter circuit which uses counters 4060 and 4026. It doesn´t need BCD to 7-segment decoders, as the ICs do the job already. A quick design here, not the most beautiful routing, but will do the job.
    Anyway, it´s a quick build.

  • Reverse Engineering

    Paul Kocyla02/07/2019 at 11:52 0 comments

    With a multimeter and and some time I was able to find the following structure:

    It looks like a gigantic Diode-AND gate. The diodes have a common anode. I couldn´t find any isolated diodes or transistors.

    What else could it be? Maybe a clock distribution circuit where the clock is decoupled by diodes? Or was it used for driving core memory? I don´t know.

    However, I will stop the reverse engineering here, as it´s already enough in the circuit to be used in the clock. I will use the AND structure to flip the clock from 59 to 00.