10 Segment LED Bar Graph - Blue

These 10 segment bar graph LEDs have many uses. With a compact footprint, simple hookup, they are easy for prototyping or finished products. Essentially, they are 10 individual blue LEDs housed together, each with an individual anode and cathode connection.

We also carry these in yellow, red, and green.

Note: The pinout on these bar graphs may vary from what is listed on the datasheet. Rotating the device 180 degrees will correct the change making pin 11 the first pin in line. We have contacted our supplier to correct this mistake in the future.

10 Segment LED Bar Graph - Blue Product Help and Resources

Dot/Bar Display Driver Hookup Guide

January 16, 2014

How to hook up the LM3914 or LM3916 to drive a 10-LED display with a lone analog signal.

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?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • bcerrato / about 14 years ago / 3

    11 pin (10 resistor) resistor networks are perfect for hooking these up without using 10 individual resistors. Any chance one could be added to the store that works well with these?

    • We can surely check into it.

    • CF / about 13 years ago / 2

      And no rats nest of resistor leads to boot! The ones I've been using only have 8 resistors in them. Some 10's would be an excellent addition for any blinky project.

  • katzmatt / about 12 years ago / 2

    has anyone ever seen any of these that are RGB?

  • KM4HPK / about 10 years ago / 1

    Is this the same one that is on adafruit?

    • Kamiquasi / about 10 years ago / 1

      No. Yes. Maybe. Welcome to the world of cheap electronics :)

      Basically, according to the datasheets these are from two different companies and have two very slightly different characteristics. One has a typical Vf of 3.2V, the other has a typical Vf of 3.4V. One has a typical forward current of 20mA, the other of 25mA.

      However, attempting to look at the markings on the packages - unfortunately only on the underside, and Adafruit doesn't have a nice clear underside picture - they certainly seem to run the same part code, and of course externally they look like an exact match.

      But are they? Who knows. If you're using these individually somewhere, I'm sure they're entirely interchangeable. But if you were using them side-by-side, I'd stick to sourcing them from a single place. You don't want to end up with one set of segments being slightly lighter/darker, or slightly more cerulean than prussian.

  • Member #296666 / about 11 years ago / 1

    Which side is positive and negative?

    • MikeGrusin / about 11 years ago / 1

      There is a very slight bevel on one of the vertical edges. If you look closely, 3 of the edges will be sharp, and the fourth will be slightly rounded. That's pin 1, and that long side is the positive side. See the datasheet for a diagram. You can also always test unknown LEDs with a voltage supply and a resistor; they will only light up in the proper direction.

  • Someone tell me how to right one of these up to a mini photocell or lilypad light sensor so that it roughly measures the amount of light coming in. Is it possible?

    • KM4HPK / about 10 years ago / 1

      You would need a Lux or luminosity sensor for that.

    • ender323 / about 10 years ago / 1

      Not to my knowledge, the mini photocells only report 'light is on' or 'light is off' they don't detect an amount of light.

  • Madbodger / about 12 years ago / 1

    Some items are titled "Bar Graph" (like this one), some are "bargraph", and I would hope that SparkFun's soundalike search algorithm would find both versions for either search. But it does not.

  • arduinoGuy / about 13 years ago / 1

    i love this product

  • MisterFuzzy / about 13 years ago / 1

    Holy crap, those went out of stock fast!
    if they are just a bunch of LEDs in a housing, why can't they be common cathode?

    • Kamiquasi / about 13 years ago / 1

      They could be, but why would you want to do that? If nothing else, things tend to sink current better than source current, so you'd want it to be common anode ;)
      This arrangement provides the most freedom in terms of circuit design :)

  • Member #149727 / about 13 years ago / 1

    I was dissapointed in these, as many of them that I ordered were not a true Blue, but a blue-green, like turquoise. Plus, the brightness wasn't consistent on all segments. Not Sparkfun's fault, but poor overseas manufacturing.

  • JoshFranz / about 13 years ago / 1

    Even better would be using this with a TLC5940! I'm going to order a few for just that reason!

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