https://github.com/blucodegh/dumbwatch

An offline-first E-paper smartwatch
https://github.com/blucodegh/dumbwatch

Last synced: 2 months ago
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An offline-first E-paper smartwatch

• Host: GitHub
• URL: https://github.com/blucodegh/dumbwatch
• Owner: BluCodeGH
• License: mit
• Created: 2022-10-23T20:19:49.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2024-04-13T23:37:22.000Z (about 1 year ago)
• Last Synced: 2024-04-14T13:11:29.879Z (about 1 year ago)
• Language: C
• Homepage:
• Size: 5.93 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# DumbWatch - An offline-first E-paper smartwatch

## Images

![Assembly](images/assembly.jpg)

The final assembled watch.

![Battery Test](images/battery_test.jpg)

Running a battery life and RTC test using a stand-in display.

![PCB](images/pcb.jpg)

Both sides of the custom PCB.

## Features

Dumbwatch is designed to be minimalist, with its most notable (anti-)feature being a lack of wireless connectivity. It still packs in a few nice-to-haves though:

- Two months of battery life on a 170 mAh LiPo

- LiPo charging over USB

- An E-paper dispay driver compatible with most common displays

- Communication over USB, e.g. for setting the time or loading your calendar for the day

The board is powered by the PIC18F27J53, which has an internal RTC connected to a 32.768 kHz watch crystal. I have not observed any noticble drift in the time thus far.