LightInk

E-Ink watch that can run solely on solar power

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Screenshots

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Hunter's comment

An open-source, solar-powered E-Ink smartwatch. By re-implementing SPI in the ESP32's RTC wake stub and using a low-quiescent buck-boost converter, it reduces active boot time to under 1ms, delivering up to 10 months of battery life on a 100mAh charge.

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Link

https://hackaday.io/project/205564-lightink

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