7 segment circuit design

Discussion in 'General Electronics Chat' started by pradeep@jha, Jun 30, 2012.

  1. pradeep@jha

    Thread Starter New Member

    Jun 30, 2012
    3
    0
    Hi, everyone
    i have little bit knowledge about electronics and i want to make one 7 segment display counter that operate with Slotted Optical Switch to count.
    Please help me.

    sorry for bad english
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    I have moved your thread to a more appropriate forum. Good luck.
     
  3. pradeep@jha

    Thread Starter New Member

    Jun 30, 2012
    3
    0
    Hi,
    i want to make 5 digit 7 segment display for my Offset Printing machine that count paper from Slotted Optical Switch, please help me..
     
  4. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    How do you want to build this? On printed PCB or proto PCB? How large should the displays be? Can you use microcontroller? How much do you want to spend on this altogether?
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    http://www.onsemi.com/pub_link/Collateral/MC14553B-D.PDF
    Have a look at the schematic on page 6.
    The 7-segment displays are low current, common anode (CA) type.
    No programming is involved.
    The output display is six digits, but you could leave off the MSD if you just want 5 digits.

    This counter will not have memory; when the power is turned off, the count will be lost.
    When power is first applied, the counters will need to be re-set. Otherwise, they may have random numbers stored in them.
     
  6. pradeep@jha

    Thread Starter New Member

    Jun 30, 2012
    3
    0

    i want to make first on bread board and i got ic 4026
     
  7. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    I've used those on a digital clock. If your voltage is much above 5V you will need drivers. To help us help you, how much of what I said made sense to you?
     
  8. pradeep@jha

    Thread Starter New Member

    Jun 30, 2012
    3
    0
    i had made 5v 7 segment with ic 4026 but it not working properly, it show 1,2,9 only.
     
  9. absf

    Senior Member

    Dec 29, 2010
    1,492
    372
    Are you using Common Cathode LED? Here is my schematics simulating 3-digit counters using 4026B. C1 and R22 are used for power-up-reset of the counters. pin 1 of U1 is the input for the pulses.

    Study it and see the pattern of the inter-digit connections. See if you can work out how to extend it to the 5-digit counter/display that you want. Post here is you have any problem...

    Allen
     
    Last edited: Jul 1, 2012
Loading...