Adafruit
Adafruit 2.9 Red/Black/White eInk Display Breakout - THINK INK
Add a large, vibrant tri-colour eInk display to your microcontroller project with this 2.9" breakout board. The panel displays red, black, and white pixels a...
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Add a large, vibrant tri-colour eInk display to your microcontroller project with this 2.9" breakout board. The panel displays red, black, and white pixels at 296×128 resolution that remain visible even with power completely disconnected — just like printed paper, but with the added impact of colour.
An onboard SRAM chip handles frame buffering so even memory-constrained microcontrollers can drive the display without sacrificing precious RAM (~9.5 KB needed). A MicroSD socket provides storage for images and text files, and the board works with both 3.3V and 5V logic for broad compatibility.
Key Features
- 2.9" Tri-Colour eInk Display – 296×128 pixel resolution with red, black, and white ink
- Onboard SRAM – Offloads frame buffering from the microcontroller
- MicroSD Socket – Store images, text files, and display assets
- Ultra-Low Power – Display retains image with no power draw; Enable pin lets you shut down SRAM, MicroSD, and display entirely
- 3.3V and 5V Compatible – Level-shifted for safe use with any microcontroller
- CircuitPython and Arduino Support – Adafruit_GFX compatible library handles all the heavy lifting
Also Available
- 2.9" Tri-Colour eInk FeatherWing – For Feather boards with buttons
- 2.9" Grayscale eInk FeatherWing – 4-level greyscale with faster refresh
Ideal For
- Colour-coded status displays and dashboards
- Low-power signage and information boards
- Price tags and retail displays
- Battery-powered projects requiring persistent display
Package Contents
- 1× Adafruit 2.9" Tri-Colour eInk Breakout (with header strip)
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- CircuitPython
- A beginner-friendly version of Python designed to run directly on microcontroller boards. If a product supports CircuitPython, you can often program it by copying code files onto the board rather than setting up a more complex toolchain.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- RAM
- RAM (random-access memory) is fast, temporary memory a device uses for working data while it is running; in its common volatile form, its contents are lost when power is removed. Some devices offer a mode that applies settings to RAM only, which is handy for testing changes temporarily because they are not stored permanently and disappear at power-off.
- SRAM
- Fast temporary memory used by a processor while a program is running. More SRAM helps with projects that handle larger data buffers, networking, displays, or more complex code.
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