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Description: This is a basic, 4-digit 7-segment display - red in color. It has a common anode. The display features one decimal point per digit, and individually controllable apostrophe and colon points.

The LEDs have a forward voltage of 2.1VDC and a max forward current of 20mA. The hardware interface is sixteen (two rows of eight) through-hole pins.

We carry this same display in yellow, green, and blue.

Dimensions:

  • Overall Display: 40.18 x 12.8 mm (1.58 x 0.50")
  • Digit Height: 10mm (0.39")

Documents:

Comments 21 comments

  • For a newbie like me these were tricky to figure out…
    In other examples I saw people put the digit they want to display high and then the A-G parts they wanted to display high also. But that doesn’t work for this display.
    The digit to display must be set to high.
    But you can either set the A-G parts to low or to toggle them between input and output (where input means on) to display them.
    The whole knowing where the flow of electrons goes when using these displays can be very mind boggling at times…

    • Sorry, I meant to say: (where OUTPUT means on)

      • Mr. JLC,
        I was unable to find any examples online of this display being used. I just received a blue (3.4 VDC) and a yellow (2.1 VDC) one of these. I’m not sure how to go about hooking them up to an arduino.
        I think the answer lies in your post above, but being the n00b that i am, i’m still unsure about what to do. Can you please describe in more detail or provide some sample code? how do i vary the voltage depending on the 2.1 V or 3.4 V version?
        Thanks in advance!

    • These are common anode displays, therefore you have to pull the A-G pins low to turn them on.

  • what is the lead diameter on these things for PCB layout? Didn’t see it in the spec …

  • maybe i’m blind, but I cannot find an explanation of what pin is what for the life of me! I understand that of the 16 pins, 8 are the 7segments abcdef+decimal, 4 are the digits, 1 is the colon, and 1 is for ground i guess? but which pin is what! if anyone could direct me to an image that made this clear i would really appreciate it!

    • It’s tricky to see, but if you look at the back of the display, through the clear epoxy, to the little circuit board within, you should be able to make out a “1” by pin 1, and a “16” by pin 16. These follow the normal IC numbering convention of increasing counterclockwise when viewed from the top of the device. Once you know the numbers, the datasheet has a diagram showing which pins go to which segments. Let us know if you need further assistance!

  • Any idea when these will be back in stock?

  • How do i control different digits displaying different things? I can only have the light up digits say the same thing.

    • Turn all digits off
      In a loop :
      Turn the first digit on
      Turn on segments
      Turn all segments off
      Turn first digit off
      Repeat for other digits
      Micros do this so fast you cant even tell when they are off so you’ll see all the digits on with diferent numbers.

    • I made a project on instructables with this display http://www.instructables.com/id/TimeDuino-Arduino-based-clock-using-7-segment-dis/

  • One of the LEDs on mine doesn’t work.

  • Look for a multiple-digit LED display driver chip to make driving these easy. Maxim makes the MAX7219 and MAX7221 that do this (http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1339).

  • I have posted my code and so have a few others on my arduino forum topic here:
    http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1265669651


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