Help Identifying 7 Seg disp.

Discussion in 'General Electronics Chat' started by Nathan Hale, Dec 26, 2013.

  1. Nathan Hale

    Thread Starter Member

    Oct 28, 2011
    Hello guys! I recently found these 7 seg displays in my garage. Does any one know their official model / product number by any chance? Can anyone tell me anything about them apart from them being 7 segment displays. Also the back of these displays have 11 pins as shown in the pitures. Do you know why do they have 11 pins?

    Thank You
    Last edited: Dec 26, 2013
  2. shteii01

    AAC Fanatic!

    Feb 19, 2010
    7 for led.
    1 power.
    1 ground.
    That's 9. Just need to figure out 2 more.
  3. GopherT

    AAC Fanatic!

    Nov 23, 2012
    There are 7-segments, two colons and either a common anode or a common cathode. It is completely possible that me pin is NC (no connection).

    Set up a 3-volt battery pack (2-AA for example) and a 100 ohm resistor and a pair of wires.
  4. MrChips


    Oct 2, 2009
    It is common to have two pins for power, 7 for segments, 2 for decimal points. That gives a total of 11 pins.

    You can identify the pins using the diode function of a DMM.
    The first thing is to figure out if it is COMMON ANODE or COMMON CATHODE.
    After that you should be able to identify the function of the remaining pins.

    7-segment LED pinouts are fairly standard.

    Have a go with Connection A for starters:

    THE_RB likes this.
  5. inwo

    Well-Known Member

    Nov 7, 2013
    7 segments
    2 for colon
    1 for am/pm
    1 common