7-Segment Display - 4-Digit (Yellow)

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

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

7-Segment Display - 4-Digit (Yellow) Product Help and Resources

Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

3 Electrical Prototyping

Skill Level: Competent - You will be required to reference a datasheet or schematic to know how to use a component. Your knowledge of a datasheet will only require basic features like power requirements, pinouts, or communications type. Also, you may need a power supply that?s greater than 12V or more than 1A worth of current.
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Looking for answers to technical questions?

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  • Daniel Nogueira / about 4 years ago / 1

    Hello ! By any chance you could get some FYQ-3942BUA ? I believe these are Amber instead of yellow ... I’m preparing a car project and I need Amber to match the dashboard lights on my Renault Clio =)

    • Daniel Nogueira / about 4 years ago / 1

      ... is there anybody out there ? ;)

    • Daniel Nogueira / about 4 years ago / 1

      My problem is ... eBay ! Ahahah this one seller sent two of a kind and one of another, they don’t match and I believe there’s even a Typo on the middle one markings ! All three don’t match the pics in the eBay listing ... no replaceable battery ... oh well ... ;) https://www.flickr.com/gp/danielnogueira78/Ga3UTA and https://www.flickr.com/gp/danielnogueira78/wKN83a

  • staticboy / about 10 years ago / 2

    I bought this a little while ago. I still have one problem though... I cant figure it out. Which pin is which? SO CONFUSED!

  • Todd Carney / about 9 years ago / 1

    The datasheet linked to here is for a LTC-4727JS display made by Lite-On. It is identical to the sheet found on their website: LTC-4727JS. On the datasheet and on the Lite-ON site, this display is shown as common cathode rather than common-anode as Sparkfun indicates above.

    So, either this is the wrong datasheet for what SF is actually selling, or their product description is wrong. I suppose both could be wrong, but how to tell? Here's two options: 1) Since I want to buy a few of these for a project (SF actually sells them cheaper than Mouser) I could find out empirically whether they're common anode or cathode. I can use either one, but I do need to know which is which. I can then report back here for future seekers of truth --OR-- 2) Sparkfun can straighten this out themselves. Either way, from the older comments above, this has been a matter of confusion for years. Frankly, I'm a little surprised.

    • I double checked the data sheet here, and it does appear to show pins 1, 2, 4, 6, 8 and 10 as the common anode pins, which matches with the product. If you are looking at a different data sheet showing other information, please let me know where you found it, so we can get that updated. We don't want anyone confused on this!

  • CanadianHobo / about 10 years ago / 1

    I was looking at the datasheet and I was wondering what the L1, L2, L3 diodes are for?


    • MikeGrusin / about 10 years ago / 1

      On page 2 of the datasheet, the top-right diagram lists those LEDs. They're the colon and the odd one between the last two digits (anyone know what that's for?)

      • wurth51 / about 10 years ago / 1

        The colon is typically a clock function, used to show that the clock is keeping time and is pulsed (like seconds). The L3 is also used as a clock function to show AM or PM if a 12 hour clock. Of course these can be anything the programmer wants.

  • Chiel / about 12 years ago / 1

    the link is currently broken.
    somehow www.sparkfun.com/commerce is added befor the actual link.
    correct datasheet link:

  • Caden / about 12 years ago / 1

    Which pin is the common anode?

    • stuff dude guy / about 12 years ago / 1

      None of them, when it says that it is common anode, it means each individual digit has a common anode, so you can multiplex by changing whitch common anode you use. So the pins labled "Digit 1, Digit 2..." are the common anodes.

  • Ian Havelock / about 12 years ago / 1

    As the datasheet is nothing but electrical characteristics, I have a question - how do you select which digit you are currently controlling??

  • PresidentOfAwesomeness / about 12 years ago / 1

    Why do people lay the wires on breadboards so tightly? Is that so they stay in and don't fall out as easily? It's bugging me... makes me feel as if I do it wrong...

    • Mark D. / about 11 years ago / 1

      It looks like they're precut jumpers.

    • So others can tell how its wired up by looking at it. Messy wiring jobs are harder to troubleshoot and generate schematics from. Thats why I generally do it.
      I don't think its to keep the wires from falling out, correct gauge wire should hold well in a breadboard. It also might be due to obsessive compulsions, notice the blue wire at the top right corner of the image is bent at the right as it was slightly longer than needed!

  • yror10 / about 12 years ago / 1

    I just bought the 14 pin one before the new 16 pin one came out. What datasheet do i read?????

  • jimblom / about 12 years ago / 1

    So, it turns out the pin-out in the datasheet is incorrect. The correct pin-out is now posted on the product page. Sorry about that!

    • Greeeg / about 12 years ago / 1

      that's a shame, but thanks for clearing that up for us. one last question is the display common anode like in the datasheet? or is it common cathode?

      • Greeeg / about 12 years ago / 1

        nevermind it says that in the 2nd line, i just didn't notice it :D

  • Greeeg / about 13 years ago / 1

    so to clarify, this is an almost identical product to the yellow one you used to sell, except it has a different pin layout? and a different amount of pins?

    • jimblom / about 13 years ago / 1

      That's correct, Greeg. Both displays are the exact same size. The footprints are similar (same pin-spacing), however this display has all 16-pins connected (and a function for each pin), rather than the 14 on the older display.

      • pp.kettu / about 13 years ago / 1

        Jimb0: That's correct, Greeg. Both displays are the exact same size. The footprints are similar (same pin-spacing), however this display has all 16-pins connected (and a function for each pin), rather than the 14 on the older display.
        If so, what are the functions for pins 14 to 16? Datasheet only covers pins 1 to 13.

        • Greeeg / about 12 years ago / 1

          I read that go the datasheet too. I'm hoping that those pins (14,15,16) are N/C's because in my design i'll need to cut them off, i'm just wanting to confirm before i send off my board designs.

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