It uses a database of literary quotes to display what time it is, highlighting the quote in red.
This project originally started as a wrist watch with battery management and a custom PCB:
The wrist watch version was too ambitious and too distracting, so I gave up and just left it as a wall-clock. Originally I took inspiration from this clock that used a kindle, but wanted more control over the hardware.
- 2.9inch (296x128 pixels) Waveshare eink module
- esp8266 development board
- Picture frame
- Source code
- NTP-sourced time
- Ubuntu font
- Literary quotes for (most) minute of the hour
It isn’t the most accurate or easy to read clock, but it is interesting and looks nice when it has a good quote on it.
The refresh is a bit ugly and could be improved (click for the youtube version):
The tri-color epaper requires two refresh cycles, one to clear the screen and put down black, then a second pass for the red. See Ben Krasnow’s (Applied Science) notes on these epaper displays for some interesting low-level technical details on how they work.