SparkFun
SparkFun 7-Segment Serial Display - Blue
The SparkFun 7-Segment Serial Display combines a 4-digit 7-segment LED display with an ATmega328 microcontroller, allowing you to control every segment using...
The SparkFun 7-Segment Serial Display combines a 4-digit 7-segment LED display with an ATmega328 microcontroller, allowing you to control every segment using just a few serial lines. It supports three communication interfaces — Serial TTL, SPI, and I²C — making it easy to integrate into a wide range of projects.
The on-board ATmega328 comes pre-loaded with the Arduino bootloader, so the display can also be programmed for stand-alone operation via the FTDI header. Power and I²C pins are positioned on the sides of the board for daisy-chaining multiple displays, and mounting holes are included for secure installation.
Key Features
- 4-Digit Blue 7-Segment Display – Alpha-numeric characters, numbers, and special symbols
- Three Serial Interfaces – TTL, SPI, and I²C
- Individual Segment Control – Control each segment, decimal point, apostrophe, and colon independently
- Adjustable Brightness – Selectable via serial command, saved to non-volatile memory
- Selectable Baud Rate – Also retained in non-volatile memory
- ATmega328 with Arduino Bootloader – Programmable for stand-alone operation
- Daisy-Chainable – Side-mounted power and I²C pins for multi-display setups
- Mounting Holes – For standoff mounting
Specifications
- Display – 4-digit, 7-segment, blue LED
- Interfaces – Serial TTL, SPI, I²C
- Microcontroller – ATmega328 (Arduino bootloader)
- Dimensions – 41 × 23 mm (1.6" × 0.9")
Package Contents
- 1× SparkFun 7-Segment Serial Display (Blue)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- baud
- Baud is the signalling rate of a serial connection, often used as the speed setting for UART communication. Matching the baud rate matters because both connected devices must use the same setting for readable data.
- Bootloader
- Small starter software on a microcontroller that lets new code be uploaded before the main program runs. Knowing how to enter bootloader mode matters when you need to program the board or recover it after a faulty sketch.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
Find this product in
Displays & Screens
Serial 7-Segment Display Schematic
Schematic · 41.3 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 641.6 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
