Adafruit
Adafruit 2.9 Grayscale eInk / ePaper Display FeatherWing - 4 Level Grayscale
Add a versatile grayscale eInk display to your Feather project with this 2.9" FeatherWing. The 296×128 pixel panel supports four levels of grey — white, ligh...
Add a versatile grayscale eInk display to your Feather project with this 2.9" FeatherWing. The 296×128 pixel panel supports four levels of grey — white, light grey, dark grey, and black — giving you more visual depth than a standard monochrome display while refreshing in about one second, far faster than tri-colour eInk panels.
The FeatherWing is tested to work with all Adafruit Feather boards, from the ESP8266 to the M0 and beyond. An onboard SRAM chip handles frame buffering so even memory-constrained microcontrollers can drive the display without sacrificing precious RAM. A MicroSD socket provides storage for images and text files, and three optional buttons are available for navigation when your Feather has spare pins.
Key Features
- 2.9" Grayscale eInk Display – 296×128 pixel resolution with 4-level greyscale
- Fast Refresh – Updates in approximately 1 second (vs ~15 seconds for tri-colour)
- Onboard SRAM – Offloads frame buffering from the microcontroller (~9.5 KB at 2 bits per pixel)
- MicroSD Socket – Store images, text files, and display assets
- 3 Optional Buttons – Built-in navigation buttons for Feathers with available pins
- Ultra-Low Power – Display retains image with no power draw
- No Soldering Required – Comes with socket headers; plug your Feather straight in
- Universal Feather Compatibility – Works with all Adafruit Feather boards
Also Available
- 2.9" Tri-Colour eInk FeatherWing – Red, black, and white version
- 2.9" Tri-Colour eInk Breakout – Universal breakout board
Ideal For
- eBook readers and text display projects
- Low-power dashboards with nuanced graphics
- Portable information displays and name badges
- Battery-powered projects requiring persistent display
Package Contents
- 1× Adafruit 2.9" Grayscale eInk FeatherWing (with socket headers)
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- FeatherWing
- A FeatherWing is an add-on board made to plug into the Feather microcontroller board layout. Knowing a product is a FeatherWing helps you check whether it will physically and electrically fit your Feather-style mainboard.
- Headers
- Rows of metal pins used to plug a module into a breadboard or connect it with jumper wires. Pre-soldered headers make the module easier to use straight away without needing to solder the pins yourself.
- 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.
- RAM
- RAM is temporary memory used while a device is running, and its contents are lost when power is removed. A “Run in RAM” mode is useful for testing settings without permanently programming the module, but it may not support every feature.
- 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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