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Adafruit 1.2 4-Digit 7-Segment Display w/I2C Backpack - Green

SKU: ADA1268

$31.95 AUD, inc GST
$29.05 AUD, exc GST

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Adafruit 1.2 4-Digit 7-Segment Display w/I2C Backpack - Green
31.95 AUD

SKU: ADA1268

$31.95 AUD, inc GST
$29.05 AUD, exc GST
1 reviews 0 5 5


  • $6.95 Standard (2-4 days, tracked)
  • $8.95 Express (Overnight*, tracked)
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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 Adafruit 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. Adafruit have them for a variety of 8x8 and 7-segment displays. They work perfectly with the displays Adafruit 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 Adafruit's 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. They 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 - Green (1:50)

Technical Details

Measurements after you mount the screen:

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Documentation and Resources:
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Product Comments

Customer Reviews

  1. Review by Ivan verified purchaser

    This is a very bright clear display. My son is using it to make a Raspberry Pi powered alarm clock. The only problem he encountered was that the display didn't light up until he tied in the 5V supply pin, he was trying to run it off 3.3V but it wouldn't light up without 5V power. The backpack makes it really easy to control the display and was easy to connect as the screen printing clearly shows which way round it goes. Really happy with this display - it's not cheap but it is quite large and very bright. (Posted on 4/10/2017)

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