counter logic

Discussion in 'General Electronics Chat' started by duxbuz, Apr 15, 2014.

  1. duxbuz

    Thread Starter Member

    Feb 23, 2014

    I will try to explain myself as best as I can.

    I am trying to create a circuit that uses a counter.

    I want to use a switch for a manual clock cycling trigger. I am not sure if this is possible or whether other elements are required.

    I am using this counter:

    I have created a diagram that has all the same pins in order to illustrate.

    I have logic problems (as usual) with my circuit.

    I decided to make the simplest tester circuit for the IC to see if I am getting the correct logic ins and outs prior to connecting to my decoder.

    I have pull downs on most of the pins and am completely unsure as to this being the correct way to go.

    I want to be able to select an output with logic probe such as 1Q0 and cycle the clock and have the value of the 1Q0 change. This is what I presume would happen if it was correctly wired up.

  2. MrChips


    Oct 2, 2009
    You do not need pull-down resistors on outputs.

    You need to debounce the switch used as a clock input.
  3. duxbuz

    Thread Starter Member

    Feb 23, 2014
    Ok I will try this later