SparkFun
SparkFun 7-Segment Serial Display - Red
A 4-digit 7-segment display with a built-in ATmega328 microcontroller, controllable via Serial TTL, SPI, or I²C — no complex wiring or multiplexing required....
A 4-digit 7-segment display with a built-in ATmega328 microcontroller, controllable via Serial TTL, SPI, or I²C — no complex wiring or multiplexing required. Each segment, decimal point, apostrophe, and colon can be individually controlled. The ATmega328 comes pre-loaded with the Arduino bootloader, so the board can also be programmed for stand-alone operation via the onboard FTDI header.
Power and I²C pins are on the sides of the board, allowing multiple displays to be daisy-chained for longer digit strings. Mounting holes are included for standoff installation.
Key Features
- Triple Interface – Serial TTL, SPI, or I²C communication
- 4-Digit Alphanumeric – Displays numbers, most letters, and special characters in red
- Individual Segment Control – Control each segment, decimal point, apostrophe, and colon independently
- Adjustable Brightness – Software-selectable, saved to non-volatile memory
- Selectable Baud Rate – Configurable and retained in non-volatile memory
- Arduino Programmable – ATmega328 with Arduino bootloader, FTDI header for programming
- Chainable – Side-mounted I²C pins for daisy-chaining multiple displays
- Dimensions: 41 × 23mm
Ideal For
- Displaying sensor readings, counters, or clocks
- Arduino and microcontroller projects needing numeric output
- Instrument panels and status displays
- Stand-alone timed or triggered display applications
Package Contents
- 1× SparkFun 7-Segment Serial Display (Red)
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.
- 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 · 669.0 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
