Adafruit eInk Feather Friend with 32KB SRAM

The Adafruit eInk Feather Friend is a FeatherWing-format driver board for eInk/e-paper displays with a standard 24-pin FPC connector. It includes all the power supply circuitry and level shifting needed to connect your favourite display (up to tri-colour 4.2") to any Feather board via SPI, plus a MicroSD card slot for storing images and data files.

Like the Breakout Friend version, it includes a 256 Kbit (32 KB) SRAM chip that handles frame buffering so you don't consume your microcontroller's RAM. The SRAM supports displays up to 4.2" (300×400 tri-colour) and shares the SPI bus with the display, requiring only one extra chip-select pin. The included Arduino and CircuitPython libraries manage everything automatically — just use it like any Adafruit_GFX compatible display.

Key Features

• 32 KB SRAM Buffer – Offloads frame buffering from your microcontroller (supports up to 300×400 tri-colour)
• 24-Pin FPC Connector – Compatible with most standard small-to-medium eInk displays
• MicroSD Card Slot – Store images, text files, and other display content
• Feather Form Factor – Plugs directly into any Feather board; stackable with other FeatherWings
• Level Shifting – Works with both 3.3V and 5V logic levels
• Power Supply Circuitry – All required voltage rails for eInk displays built in
• SPI Interface – Standard SPI connection with shared bus for display and SRAM

Also Available

• eInk Breakout Friend (standalone breadboard-friendly version)

Ideal For

• Adding an e-paper display to Feather-based projects
• Low-power IoT displays and battery-powered signage
• Daylight-readable information panels and dashboards
• Projects requiring image storage on MicroSD alongside e-paper output

Package Contents

• 1× Adafruit eInk Feather Friend with 32 KB SRAM (assembled)
• 1× Header strip