7 segment help

Discussion in 'General Electronics Chat' started by waqas_mirza, Jan 14, 2011.

  1. waqas_mirza

    Thread Starter New Member

    Jan 2, 2011
    8
    0
    Hello all, i am having a problem, i never used a 7 segment display before, i have a 2 digit 7 segment, i dont know which one it is, cathode or anode it is written CD below its surface, and i saw few data sheets of 2 digit common cathod and common cathode, but my IC have total 18 pins.. 9 pins each side.. kindly please help me in resolving my issue, please guide me how to use it.
    thanks
     
  2. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,795
    951
    It must have some part number markings on it somewhere.

    If not then we can't help


    If it does have numbers, can you please post what is written on the device?
     
  3. Markd77

    Senior Member

    Sep 7, 2009
    2,803
    594
    I'd just get a 3V supply with a 1K resistor in series and start connecting across pins. Shouldn't take too long to figure it out.
     
  4. waqas_mirza

    Thread Starter New Member

    Jan 2, 2011
    8
    0
    nothing written on it
    juts CD and this code is written on the bottom
    5261A\B-1
     
  5. waqas_mirza

    Thread Starter New Member

    Jan 2, 2011
    8
    0
    i have applied +ve and -ve 5 volts accross all of its pins.. nothing happened
     
  6. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
    1,758
    98
    5V across an LED without current limiting probably killed the segment.
     
  7. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,795
    951
  8. waqas_mirza

    Thread Starter New Member

    Jan 2, 2011
    8
    0
    i am using 7805 transistor
     
  9. waqas_mirza

    Thread Starter New Member

    Jan 2, 2011
    8
    0
  10. waqas_mirza

    Thread Starter New Member

    Jan 2, 2011
    8
    0
    it********
     
Loading...