Adafruit 1.2\" 4-Digit 7-Segment Display w/I2C Backpack - Red

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ADA1270
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What's better than a single LED? Lots of LEDs! A fun way to make a numeric display is to use a 4-digit 7-segment display. LED matrices like these are 'multiplexed' - so to control all the seven-segment LEDs you need 14 pins. That's a lot of pins, and there are driver chips like the MAX7219 that can control a matrix for you but there's a lot of wiring to set up and they take up a ton of space. Here at Adafruit we feel your pain! After all, wouldn't it be awesome if you could control a matrix without tons of wiring? That's where these adorable LED matrix backpacks come in. We have them for a variety of 8x8 and 7-segment displays. They work perfectly with the displays we stock in the Adafruit shop and make adding a bright display trivial.

The backpacks use a driver chip that does all the heavy lifting for you: They have a built in clock so they multiplex the display. They use constant-current drivers for ultra-bright, consistent color (the images above are photographed at the dimmest setting to avoid overloading our camera!), 1/16 step display dimming, all via a simple I2C interface. The backpacks come with address-selection jumpers so you can connect up to eight 7-segments (or a combination, such as four mini 8x8's and four 7-segments, etc) on a single I2C bus.

The product kit comes with:

A bit of soldering is required to attach the matrix onto the backpack but its very easy to do and only takes about 5 minutes.

Of course, in classic Adafruit fashion, we also have a detailed tutorial showing you how to solder, wire and control the display. We even wrote very nice libraries for the backpacks so you can get running in under half an hour, displaying numbers on the 7-segment for either Arduino or Raspberry Pi. If you've been eyeing matrix displays but hesitated because of the complexity, his is the solution you've been looking for!

Adafruit 1.2" 4-Digit 7-Segment Display w/I2C Backpack Red (1:50)



Technical Details

Measurements after you mount the screen:

    RoHS 2 2011 65 EU Compliant
    RoHS 2 2015 863 EU Compliant


    Learn

    Control small LED matrices with ease
    Build a large LED Thermometer / Clock using a Raspberry Pi
    Use LED matrix, bar graph, and segment displays on your favorite small board computer.
    Build your own clock that sets itself with an Arduino, LED display, and GPS receiver!
    SEE ALL GUIDES
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    GS
    05/09/2022
    greg s.
    Australia Australia
    I recommend this product
    • How do you rate our services? Ok

    adafruit 1.2 " 7 segment display

    Was simple to solder on the backpack board (have used this display and backpack previously) So - already had driver loaded in arduino software. Powered up and tested yesterday - all worked as expected. Seems all these LED displays have a slightly "bowed" surface ie not dead flat.

    A
    31/08/2021
    Anonymous
    Australia Australia
    I recommend this product
    • How do you rate our services? Awesome

    Excellent Unit

    Top quality, very easy to set up, working in no time. Super fast shipping, very smooth transaction. Had a small issue with the Adafruit python library on the Raspberry Pi, that was nothing to do with the product, but reinstalled and has worked fine ever since.

    Pakronics® Adafruit 1.2\ 4-Digit 7-Segment Display w/I2C Backpack - Red Review

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