0-99 Counter Circuit :)

Discussion in 'The Projects Forum' started by DXJohnPaulXD, Jun 8, 2016.

  1. DXJohnPaulXD

    Thread Starter New Member

    Jun 8, 2016
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    Hello guys my name is John Paul, do guys have any idea how to make a 0-99 up/down counter with a common cathode display?
    also can you tell me guys where to put a schmitt trigger to prevent button bouncing?


    i cant find a 0-99 counter using IC 4510 and 4511 or IC 7490 and 7447
    i want it to count up and down using a button ;)
    and i cant find any simple schmitt trigger circuit :(

    Any Help would be very Appreciated :)
     
  2. bushrat

    Member

    Nov 29, 2014
    97
    22
    Googled "0-99 bcd counter", first image shows what you need..
    [​IMG]
    Well, at least counting one way..
     
  3. ScottWang

    Moderator

    Aug 23, 2012
    4,850
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    Add an cmos TLC555 set to the monostable to be the debounce component, the delay time setup as 50mS, the pin 3 connect to the clock input of CD4510.
     
  4. DXJohnPaulXD

    Thread Starter New Member

    Jun 8, 2016
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    Oops 7448 ic is not available in the store
     
  5. DXJohnPaulXD

    Thread Starter New Member

    Jun 8, 2016
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    Thanks for the reply but i am finding easier ways for a debounce circuit
     
  6. DXJohnPaulXD

    Thread Starter New Member

    Jun 8, 2016
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    How about using ic 4510 and ic 4511? (Sorry if im bugging you =) )
     
  7. DXJohnPaulXD

    Thread Starter New Member

    Jun 8, 2016
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  8. dl324

    Distinguished Member

    Mar 30, 2015
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    Similar circuit. TI datasheet has examples for synchronous and ripple clocking.
     
  9. dl324

    Distinguished Member

    Mar 30, 2015
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    Only counts up.

    Just design your own using whatever up/down counter you buy. Not that difficult and most datasheets will have application suggestions.
     
  10. hp1729

    Well-Known Member

    Nov 23, 2015
    1,938
    218
    Something like this? I haven't built it yet but it should work.
     
    DXJohnPaulXD likes this.
  11. DXJohnPaulXD

    Thread Starter New Member

    Jun 8, 2016
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    Exactly! :D i will just wait for you to test it :D
     
  12. DXJohnPaulXD

    Thread Starter New Member

    Jun 8, 2016
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    Ok, Thanks :)
     
  13. DXJohnPaulXD

    Thread Starter New Member

    Jun 8, 2016
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    Wait a minute. Did your circuit say to use the 4510 IC to be schmitt trigger?
    If 4510 ic is the schmitt trigger then how do i connect it?
    Show the pic of ur design on breadboard ;)


    I forgot to say im a 10 yr old kid lol
     
  14. DXJohnPaulXD

    Thread Starter New Member

    Jun 8, 2016
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    UPDATE: it was a cd40106 ic (my eyes betrayed me) when i looked at its datasheet it was made out of schmitt symbols (schmitt trigger?) but i found another ic called 74hc14....so maybe i can subsitute the CD40106 with a 74HC14?
    Even if one of them is an inverted schmitt trigger
     
  15. ScottWang

    Moderator

    Aug 23, 2012
    4,850
    767
    How wonderful a 10 years old kid joined the forum, really welcome... :)
    And you preferred the 14 pins ic then a 8 pin cmos TLC555, you like big size?
     
  16. dl324

    Distinguished Member

    Mar 30, 2015
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    Didn't realize you were only 10; not many children can read schematics and datasheets:)

    Here's a schematic using CD4510 and CD4511. I just drew it and haven't tested, but it should work.
    upload_2016-6-9_6-57-59.png
    Post here if you have issues or questions.
     
  17. dl324

    Distinguished Member

    Mar 30, 2015
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    They're both schmitt inverters and logically equivalent, but CD parts can operate from 3-15V while 74HC operate from 2-6V.

    There are many different 74 series hex schmitt inverters: 7414, 74LS14, 74HC14, 74HCT14, 74AC14, 74ACT, ... They differ in supply voltage, speed, fanout, input/out characteristics.
     
  18. DXJohnPaulXD

    Thread Starter New Member

    Jun 8, 2016
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    Tlc555 is not available in the store so i chose the other one ;)
    EDIT: Im gonna use the NE555 timer instead of the tlc555 is that ok?
     
    Last edited: Jun 9, 2016
  19. DXJohnPaulXD

    Thread Starter New Member

    Jun 8, 2016
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    Oh ok then i will choose cd40106 tnx ;)
     
  20. DXJohnPaulXD

    Thread Starter New Member

    Jun 8, 2016
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    Guys if i use a ne555 timer how do i make it count at the normal speed and only up to 24? (Like a shot clock) :)
     
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