count down/up problems

Discussion in 'Homework Help' started by haniel008, Oct 17, 2012.

  1. haniel008

    Thread Starter New Member

    Oct 17, 2012
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    So im using a 74193 to count 0-9 or 9-0, so far i can only count up since im just using one push button so my question is.... can i use a switch to somehow count up and down using the same push button?
    and is there a website for making and simulating the circuit?
    i tried looking for one but i cant find one where ic's are available to use
    if not is there a free program available for download?

    thanks
     
  2. MrChips

    Moderator

    Oct 2, 2009
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  3. haniel008

    Thread Starter New Member

    Oct 17, 2012
    2
    0
    Thanks!!
    um just some questions, what is the resistor and capacitor for? and how can i explain to my teacher why i use them? and how do i justify why i used these certain values?
    BTW with the values u used in the post u showed me can use it in a 5V power supply with 74ls193, BCD to 7 segment(forgot the number of ic) and a common anode 7 segment?
     
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