Eink-word-clock-watch: Difference between revisions

Latest revision as of 18:40, 15 April 2019

Project E-ink wordclock watch

E-ink wordclock watch
Status	In progress
Contact	jelly
Last Update	2019-04-15

The plan is to make an e-ink watch with a 1.54" display which will display a word clock of the current time which updates every ~ 3/5 minutes.

e-eink screen datasheet datasheet 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 (3V ~ 225 mAh / lithium battery small enough? (if powerful enough) 3.7 V 180 mAh 502025 Lithium Polymeer Li-Po should fit under the display, but might be too big.

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.

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 === Parts ===
-* [https://www.waveshare.com/1.54inch-e-paper.htm e-eink screen] [https://www.waveshare.com/w/upload/7/77/1.54inch_e-Paper_Datasheet.pdf datasheet] 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)
+* [https://www.waveshare.com/1.54inch-e-paper.htm e-eink screen] [https://www.waveshare.com/w/upload/7/77/1.54inch_e-Paper_Datasheet.pdf datasheet] [https://www.unisystem-displays.com/en/fileuploader/download/download/?d=0&file=custom%2Fupload%2Ffile%2Fc70036746e01f55cd5bc6c7d14c8c34b%2FHINK-E0154A05_spec%C2%A05.11.pdf datasheet] 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 (3V ~ 225 mAh / lithium battery small enough? (if powerful enough) 3.7 V 180 mAh 502025 Lithium Polymeer Li-Po  should fit under the display, but might be too big.
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