7 segment decoder

Discussion in 'Electronics Resources' started by kamalsolimen, Oct 22, 2014.

  1. kamalsolimen

    Thread Starter New Member

    Oct 3, 2014
    18
    0
    i have 3 single 7 segment i need to connect its to pic16f877a

    i didn't found decoder can connect 3 7-degment

    to decrease number of pin connected to pic16f877a
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,441
    3,361
    Use one 7-segment decoder/driver chip. It only needs four pins to connect.
    Then use three additional pins to multiplex the display.

    Seven pins needed in total.
     
  3. Robartes

    Member

    Oct 1, 2014
    57
    13
  4. ScottWang

    Moderator

    Aug 23, 2012
    4,854
    767
    Using CD4511 bcd to decimal decoder, and three bjts to drive the 7-segments led, so you just need 4 pins for CD4511 and 3 pins for 3 bjt drivers.
     
  5. kamalsolimen

    Thread Starter New Member

    Oct 3, 2014
    18
    0
    thanks , i can`t get schematic use pic16f877a and MAX7219
     
  6. vishal12345

    New Member

    Dec 16, 2014
    8
    1
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