Adafruit
Adafruit 1.54 Monochrome eInk / ePaper Display with SRAM - 200x200 Monochrome
The Adafruit 1.54" Monochrome eInk Display brings electronic paper technology to your microcontroller projects. Featuring a 200×200 pixel black-and-white dis...
The Adafruit 1.54" Monochrome eInk Display brings electronic paper technology to your microcontroller projects. Featuring a 200×200 pixel black-and-white display, this breakout delivers high-contrast, daylight-readable visuals that persist even when power is completely disconnected — just like printed paper.
An onboard SRAM chip offloads the frame buffer from your microcontroller's memory, sharing the same SPI bus as the display with just one extra pin. This means you can compose your image in SRAM and transfer it to the eInk panel when ready, keeping your microcontroller's RAM free for other tasks.
Key Features
- 200×200 Monochrome eInk – High-contrast black pixels on a white background
- Onboard SRAM – Offloads frame buffer so your microcontroller doesn't need 8KB of spare RAM
- Ultra-Low Power – Image persists with no power; Enable pin lets you shut down SRAM and display completely
- Fast Refresh – Updates in a couple of seconds (much faster than tri-colour eInk displays)
- MicroSD Card Slot – Store images, text files, and other display content
- 3/5V Compatible – Onboard 3.3V regulator with logic-level safe inputs
- SPI Interface – Works with any microcontroller platform
Also Available
Ideal For
- Low-power signage and information displays
- E-reader and digital label projects
- Battery-powered status indicators
- Name badges and shelf tags
Package Contents
- 1× Adafruit 1.54" Monochrome eInk display breakout with SRAM
- 1× Header strip
Specifications
- Display Size – 1.54" diagonal
- Resolution – 200×200 pixels
- Colours – Monochrome (black and white)
- Overall Dimensions – 43.5mm × 43mm × 4.6mm (1.7" × 1.6" × 0.18")
- Display Area – 28mm × 28mm (1.1" × 1.1")
- Mounting Holes – 4× 0.1" / 2.5mm in corners
- Weight – 8.8g
- Interface – SPI
- Logic Level – 3.3V or 5V
Jargon buster
Plain-language definitions for the technical terms used above.
- 3.3V regulator
- A 3.3V regulator is a power circuit that provides a steady 3.3 volts for parts that need that supply voltage. On a breakout board, it can let the sensor run safely even when the connected microcontroller or power source uses a higher voltage.
- 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.
- frame buffer
- A frame buffer is memory that stores a complete image before it is shown on a display. Displays without their own frame buffer need the controller to continuously send pixel data, which affects the choice of microcontroller and software library.
- 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.
- microSD card
- A microSD card is a small removable memory card used to store files such as audio tracks. For this product, the card is where the sound files live, so its capacity and formatting can affect how many sounds you can use.
- 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.
- 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.
- 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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