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7-Segment LED Counter (binary and base 10)

Discussion in 'Electronic Projects' started by Tom McCurdy, Dec 8, 2004.

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  1. ArtoR

    ArtoR New Member

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    Thank you for replies!
    I'll do the modifications and tell you later how they work! :)

    Arto
     
  2. lanz

    lanz New Member

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    is the materials available here
     
  3. ArtoR

    ArtoR New Member

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    Here's the fixed circuit.
    In the previous circuit diagram I posted there is a drawing error: all the ground level voltages are connected into same potential.

    Only improvement was that the 74LS04 needed to be changed to 74LS14.
    Works!!
    The pulses from the transistor were not so clean, so the counter incremented too much (with 74LS04).

    This picture is of circuit that works.
     

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    Last edited: Mar 4, 2008
  4. dave

    Dave New Member

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  5. Hero999

    Hero999 Banned

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    Geat but you could save an IC if you don't mine an extra transistor and a few resistors.
     

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  6. TechnotroANIK

    TechnotroANIK New Member

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    m a high scl guy...m making a decimal adder circuit.....already done adddition part using 7483.
    can display 0-9 in 7-segment. bt how do i do the A-F part??????
    does it require any extra chip or something??????
    help plzzz.
    or i'll have 2 make sumthing to take carry bit frm 7483 and work on it..
     
  7. BaCaRdi

    BaCaRdi Member

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    Try spell-check first, Sorry my poor English translator is not functioning properly..lol

    -BaC

     
  8. TechnotroANIK

    TechnotroANIK New Member

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    to bacardi( sozzled, as the name suggests),
    u can learn ur english in ENGLISH CLASSES.
    try to help in the electronics part.
    Abuses apart,
    can someone send me the connection btwn a 7448 and 1050CHRI( common cathode 7-segment).
     
  9. BaCaRdi

    BaCaRdi Member

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    Damned them id10t errors...lol

     
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  10. kevlar_star

    kevlar_star New Member

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    do you have the circuit...? so i could know the configurations..thanx
     
  11. NaRuTo

    NaRuTo New Member

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    hello... i need a 4 seven segment display counter from 0 to 9999 that has an ANY value of DC supply. will you please help me how to do that???

    if u have a circuit diagram for it... email me at john_rey12@yahoo.com

    thanks..
     
  12. hayzee518

    hayzee518 New Member

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    where is your pulse input to the circuit? also I'll need a zero contact bounce circuit.
     
  13. BaCaRdi

    BaCaRdi Member

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    Can you elaborate on a "zero contact bounce circuit? I haven't seen any mechanical device that would warrant a de-bounce.

    -BaC
    Just wondering what you meant is all.
     
  14. hayzee518

    hayzee518 New Member

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    I assembled a small up count circuit with a pushbutton as the input. when you make the contact the counter increments one digit. when you release the button the contacts open and you'll get another unwanted pulse. so for each push of the button you get two digits.
     
  15. msmohanavelu

    msmohanavelu New Member

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    thank u very super

    superthank u very super
     
  16. BaCaRdi

    BaCaRdi Member

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    Ahh well a button would be a mechanical device, got you.

    -BaC
     
  17. usif

    usif New Member

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    This is a great circuit, and when taken in depth it can teach someone the basics of Logic circuits and binary
     
  18. kanopener

    kanopener New Member

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    hello sir and thank you for the nice, simple and very well written diagram, am just asking, what can i add(or remove) to this circuit to make it only count from 0-4 and can be controlled by 2 manual switches to simply ADD or SUBTRACT a count.

    Ive already seen the diagram on how to move the count positively by manual SWITCH but what I'm puzzled about is how I can adapt the circuit to subtract a count and make the whole only from 0 - 4.... thanks a lot and keep posting those cool diagrams :)
     
  19. mibedo

    mibedo New Member

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    hi iam just a newbie i really need to know how to make 3 seven segmen to count off like a stop watch for my project for example 0:09 to 0:10 to 0:11. i know how to display the no. in the seven segment the problem is i cant place the digit ten in the 2nd seven segment and make the 1st seven segmen count off again until it reach to 9 and make another change in the 2nd seven segment again. wil you help me? i really need this and anothe thing this circuit is connected in the computer it must have a parallel port
     
  20. narendran

    narendran New Member

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    request

    hello sir i'm narendran.i felt appearence of this circuit is poor for me. so kindly request you to send me the the same circuit with good appearence.......to
    naren.scorpion08@rediffmail.com
     
  21. Sobrle

    Sobrle New Member

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    Did you manage to make this thing? If you did, could you share some informations about it...

    I would like to do this thing too. 3 seven digits counter, connected to the parallel port, from where this increase signal will come.

    Tnx in advance
     
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