Adafruit
Quad Alphanumeric Display - 0.54 Digits w/ I2C Backpack - Blue
A four-digit 0.54-inch blue alphanumeric LED display with an I2C backpack. Each digit has 14 segments, allowing it to display letters, numbers, and basic sym...
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A four-digit 0.54-inch blue alphanumeric LED display with an I2C backpack. Each digit has 14 segments, allowing it to display letters, numbers, and basic symbols. The bright blue LEDs on a black surface are readable from up to 7 metres (23 feet) away.
The I2C backpack simplifies wiring to just two data pins. Multiple backpacks can be daisy-chained on the same I2C bus — solder the address jumpers on the back to set up to 8 unique addresses. A small amount of soldering is required to attach the displays to the backpack (about 5 minutes).
Key Features
- 14-Segment Alphanumeric – Displays full alphabet, numbers, and basic symbols
- Bright Blue LEDs – Readable up to 7 metres away
- I2C Interface – Only two data pins required
- Stackable – Chain up to 8 backpacks on a shared I2C bus
- 0.54" Digit Height – Compact yet legible
Package Contents
- 2× Blue alphanumeric displays (0.54" digit height, 2 digits each)
- 1× Adafruit 14-segment LED alphanumeric backpack
- 1× 5-pin header
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- Address jumpers
- Address jumpers are small solder pads, links or switches used to change a device's address on a shared bus such as I2C. They matter when you want to connect several identical devices to the same controller, since each one needs a unique address to avoid conflicts.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
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