Adafruit eInk Breakout Friend with 32KB SRAM

Add some bi-stability to your life with an Adafruit eInk Breakout Friend - your fun pal who's happy to lend a hand when you want to work with EInk/E-Paper displays.

Most small-medium size EInk displays have a standard 24-pin connection. This breakout adds all the power supply support circuitry and level shifting so you can attach your favorite display (up to tri-color 4.2") and wire it to your favorite development board.

Using CircuitPython or Arduino libraries, you can create a 'frame buffer' with what pixels you want to activate then write that out to the display. Unlike most simple breakouts, the eInk Friend comes with a 256 Kilobit (32 Kilobyte) SRAM chip. This allows controlling up to a 4.2" 300x400 tri-color display without using the microcontroller's RAM to buffer the full image.

The SRAM chip shares the SPI port the eInk display uses with only one extra pin required. You can use the SRAM to set up the display data, then shuffle from SRAM to eInk when ready. The included library automates this process and can be interfaced as an Adafruit_GFX compatible display. For ultra-low power usages, the onboard 3.3V regulator has an Enable pin to shut down power to the SRAM and display.

By default, the RESET resistor is set to 0.5 ohms (most common); this can be changed to 3 ohms via solder jumpers.

Comes assembled and tested with some header; soldering iron required to attach the header for breadboarding or installation.

Note: Does not include an EInk display! Compatible with any EInk display with a 24-pin FPC connector. Check the provided schematics to verify your display's compatibility before purchasing.