Grove – 0.54″ Red Dual Alphanumeric Display

The Grove 0.54″ Red Dual Alphanumeric Display is a 2-digit module that uses 14-segment LEDs to display full alphanumeric characters, not just numbers. Unlike standard 7-segment displays, it can render all letters and digits, making it ideal for more expressive outputs.

Each digit is 0.54″ high and uses red LEDs with a brightness of 30mcd, clearly visible from several metres away. The module includes the HT16K33 LED controller, which simplifies wiring by enabling I2C communication. Only four connections are neededVCC, GND, SDA, and SCLreducing the I/O pin usage compared to traditional 14-segment wiring.

It runs at 3.3V or 5V and connects easily via the Grove I2C interface. The module is compatible with various platforms including Arduino and Seeeduino. If using multiple displays, external power (VCC and GND) should be provided separately, with SDA, SCL, and GND lines shared with the microcontroller.

Features

• 2-digit 14-segment alphanumeric display
• Displays full letters and numbers
• Red LED with ultra-high brightness (30mcd)
• Digit height: 0.54 inch
• Grove I2C interface uses only two I/O pins
• Onboard HT16K33 LED controller
• Supports 3.3V and 5V supply voltage
• Easy plug-and-play connection, no soldering required
• Selectable I2C address (default 0x70)
• Operating temperature: -30C to 85C
• Module size: 40 40 mm
• External power is required when using multiple displays

Specifications

Resources

• Product Wiki
• Library
• Schematic
• LED Module Datasheet
• HT16K33 Datasheet
• MPS MP2155 Datasheet
• Part number: Seeed 104020132

Package Contents

• 1x Grove – 0.54″ Red Dual Alphanumeric Display

This module is a 2 digit alphanumeric display with high brightness and red backlight, each digit is consists of a 14-segment digital tube. The commonly used 7-segment display can only display the numbers 0-9 and a limited number of letters. In contrast, the 14-segment digital display does not have this limitation, it can display all the characters, that’s why we call it alphanumeric display. The digit height is 0.54 inch and the red LED used in this module has super high brightness, so you can see it a few meters away. Usually, the 14-segment display needs to use 17 or more wires to control the display, which means that a large amount of IO of your main control board (such as Arduino) will be occupied. With the help of on-board HT16K33 chip and Grove connector, we made it an i2c display, only four wires are enough. No troublesome soldering and no complicated wiring

Features

• Can display all letters and numbers
• Ultra-high brightness:30mcd
• Grove I2C, only takes two IO pins
• Onboard drivers, easy to use
• Cathode display

Applications

• Clock display
• Display speed, temperature, etc.
• Letter display

Pinout

Resources

• Grove – 0.54 inch Red Dual Alphanumeric Display – Seeed Wiki (seeedstudio.com)

MPN 104020132