{"title":"Adafruit eInk Breakout Friend with 32KB SRAM","handle":"adafruit-eink-breakout-friend-with-32kb-sram","url":"/products/adafruit-eink-breakout-friend-with-32kb-sram","description":"The Adafruit eInk Breakout Friend is a 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 development board via SPI.\n\nUnlike basic breakouts, the eInk Breakout Friend includes a 256 Kbit (32 KB) SRAM chip that handles frame buffering for you. This means you can drive displays up to 4.2\" (300×400 tri-colour) without consuming your microcontroller's precious RAM. The SRAM 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.\n\nKey Features\n\n\n32 KB SRAM Buffer – Offloads frame buffering from your microcontroller (supports up to 300×400 tri-colour)\n\n24-Pin FPC Connector – Compatible with most standard small-to-medium eInk displays\n\nLevel Shifting – Works with both 3.3V and 5V logic levels\n\nPower Supply Circuitry – All required voltage rails for eInk displays built in\n\nEnable Pin – Shut down power to the SRAM and display for ultra-low-power operation\n\nConfigurable RESE Resistor – Default 0.5 Ω, switchable to 3 Ω via solder jumper\n\nSPI Interface – Standard SPI connection with shared bus for display and SRAM\n\n\nAlso Available\n\n\neInk Feather Friend (Feather form factor with MicroSD slot)\n\n\nIdeal For\n\nLow-power displays for IoT and battery-powered projects\nE-paper signage and information displays\nProjects requiring a daylight-readable, bi-stable display\nPrototyping with eInk displays on any SPI-capable board\n\n\nPackage Contents\n\n1× Adafruit eInk Breakout Friend with 32 KB SRAM (assembled)\n1× Header strip\n\n\n\nImportant: eInk display is not included. This board works with most eInk displays that have a 24-pin FPC connector — verify your display's pinout is compatible before purchasing.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":5320,"title":"Default Title","sku":"AF-4224","price":17.25,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}