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

Introducing the Adafruit 4-Digit 7-Segment Display Backpack, the easiest way to add a numeric display to your project without the hassle of complex wiring! Typically, controlling a 4-digit 7-segment display requires 14 pins, but with this clever backpack, you can use just I2C to control the display, reducing pin usage and simplifying setup.

The MAX7219 driver chip built into the backpack handles all the multiplexing for you, ensuring ultra-bright and consistent color with constant-current drivers. It also offers 1/16-step dimming control for precise brightness adjustments. The backpack includes address-selection jumpers, allowing you to connect up to eight 7-segment displays or combinations of displays (e.g., mini 8x8's and 7-segments) on a single I2C bus.

Key Features:

• Ultra-bright LEDs: Powered by constant-current drivers for consistent brightness and clarity.
• Easy Power Options: With the new version of the backpack, you can use both 3.3V or 5.0V power and data, still getting bright LEDs thanks to level shifters and a small boosting converter.
• I2C Interface: Reduces wiring complexity by using I2C, and you can control multiple displays with a single bus.
• Quick Assembly: The kit includes a fully assembled LED backpack, a 1.2" tall red 7-segment display, and a 5-pin header for easy connections. Soldering the display to the backpack takes only 5 minutes.

What's Included:

• Assembled LED backpack
• 4-digit, 1.2" tall red 7-segment display
• 5-pin header for easy connection

Software Support: To make your setup even easier, we provide a detailed tutorial and libraries for Arduino and Raspberry Pi. Get started with displaying numbers in under 30 minutes using simple, ready-to-go code.

If you've been looking to use a matrix display but found the wiring and complexity intimidating, this backpack is the perfect solution!

Technical Details:

• Revised Version (June 30, 2023): The kit now includes a 5V boost converter and STEMMA QT ports for even easier connections. Additionally, the Adafruit Pinguin has been added to the PCB for a clear and attractive silkscreen design.

• Dimensions (after mounting the screen):

  • Width: 50mm (2 inches)
  • Length: 120mm (4.7 inches)
  • Height: 13mm (0.5 inches)

• I2C Addresses: The board/chip uses 7-bit I2C addresses between 0x70-0x77, which can be selected using jumpers.

• Resources: EagleCAD PCB files, datasheets, and Fritzing diagrams are available in the product tutorial for easy reference.