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Home | Product Categories | 7-Segment | COM-09481

4-Digit 7-Segment Display - Blue

sku: COM-09481

Description: This is a basic, 4-digit 7-segment display - blue 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 3.4VDC 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 red, green, and yellow.

Dimensions:

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

Documents:

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images are CC BY-NC-SA 3.0

ASCII version


Comments 12 comments

  • TheMoogle | about 2 years ago 1

    not compatible with the Capacitance Meter DIY Kit X_x as i just found out

  • jhu | about 2 years ago 1

    they really need to dump this on one of those serial display boards w/ the atmega168

  • ahmad | about 2 years ago 1

    Hey sparkfun and community,
    I was wondering if anyone could direct me to a good tutorial for using these particular displays.
    Or could someone who got them working please provide some sample code and description of schematics?
    Thanks!

    • turinturambar88 | about 2 years ago 1

      ahmad,
      I just got one of these in the mail, and I’m starting to get it to work. I’m using an atmega48, and I connected PORTD to the display with LED_A-PORTD0…LED_G-PORTD6. You can find a table of bit encodings at the bottom of http://en.wikipedia.org/wiki/7_segment_display and store them in an array (use the gfedcba column, but invert the values because the display is common anode, i.e. led_digits[0] = ~0x3F;). If you set PORTD to one of those values, and then set one of the Digit # pins on the LED high, you should see that value on that digit. You’ll have to rotate through turning the different digits on and off quickly to set different values on each. I’m new at this, so if there’s a better way I’d love to know, but hopefully this helps some.

  • ahmad | about 2 years ago 1

    Turinturambar88,
    Thanks for the great info. I did manage to get this working and your advice is dead-on.
    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

  • JohnBoxall | about 2 years ago 1

    These are very clear and easy to use, for a demonstration please visit: http://wp.me/pQmjR-zL

  • LJC41 | about 2 years ago 1

    anyone know he manufacturer part number?

  • dustinandrews | about a year ago 1

    You can’t charlieplex the display due to a single common anode. If you want to be able to control all the lights, you will need like 14 pins to do so.
    In theory you could drive a display like this with just 5 pins if it was made out of individual LEDs.

  • orcinus | about a year ago 1

    This is what it looks like in action (direct-driven, w/ 330 Ohm resistors):
    http://www.youtube.com/watch?v=HbTW_QWEx6s

  • EvilGenius121 | last year 1

    If anyone wants some extra code or wants do make a clock with an arduino I made a project on instructables with this display
    http://www.instructables.com/id/TimeDuino-Arduino-based-clock-using-7-segment-dis/