Eink-word-clock-watch

E-ink word clock watch

This is a research page for my project to make a watch with an e-ink screen displaying word clock.

Requirements

• Refresh e-ink screen (ie. update word clock) every ~ 3 minutes
• Be able to set the time or sync it via WiFi/Radio?
• Capable or running for > one month

Interfaces

• SPI
• Serial for debugging / flashing?

Parts

• e-eink module Requiring 3.3 V, SPI and has refresh power req. of 26.4 mW with standby power of < 0.0 17 mW (0.0264/3.3 = 8mA)
• Coin cell** / lithium battery small enough? (if powerful enough)

Prototyping

Use a e-ink breakout board with the preferred $MCU to display a simple "hello world" text every three minutes and measure the power usage.