Help wiring seven segment LED

Discussion in 'The Projects Forum' started by droggie, Jan 6, 2013.

  1. droggie

    Thread Starter Active Member

    Oct 21, 2012
  2. k7elp60

    AAC Fanatic!

    Nov 4, 2008
    It is relative simple. The 7 segment LED is either CA(common anode) or CC(common cathode) If you want segment A on connect a resistor to that pin. If the LED is CC then connect the CC pin to the - of the power source, and connect the free end of the resistor to + of the voltage source. If you are using up to 9V for the source use a 560 resistor and if you are using a 12V source use a 1KΩ resistor.
    The pins are counted from the top left hand side, The dot near the bottom of one side I think is the right side. Even though some pins are missing you still have to count the blank spot as a pin
    Last edited: Jan 6, 2013
  3. MrCarlos

    Active Member

    Jan 2, 2010
    Hello droggie

    According to the data sheets that you enclose You can determine the PINS for each segment and what to polarize the Display.
    Note that pins 3, 5, 10, and 11 do not have to physically display.

    compares the figure is on page 2 of 5 with the first image that you enclose.
    You display is common cathode.

  4. droggie

    Thread Starter Active Member

    Oct 21, 2012
    Thanks guys. So either the common anode or cathode will be the main trigger. Mine is cathode so the main source is the cathode and the anode is to light the other LEDs..correct?
  5. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    Common cathode connections are cathode to ground, then Signal In (+5V typically) through a current limiting resistor (330Ω or so) to each segment pin.