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A comment on Building an e-ink picture frame that displays an iCloud photo album. Parent comment

Re:Building an e-ink picture frame that displays an iCloud p... by ratg13 on Tuesday January 09, 2024 @12:27PM (#38928914)
You’d have to constantly power an LCD display.

With an e-ink device you could create something that only needs to be recharged 1-2 times a year, or that is passively charged off your WiFi.

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Re:Building an e-ink picture frame that displays an iCloud p... by samb1729 on Tuesday January 09, 2024 @02:45PM (#38930971)
> passively charged off your WiFi

I had no idea this is possible. Is there a name for power-over-wifi?

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Re:Building an e-ink picture frame that displays an iCloud p... by KomoD on Tuesday January 09, 2024 @03:59PM (#38932030)
> Is there a name for power-over-wifi?

Yes, the name for power over wifi is power over wifi (or PoWiFi).

But doesn't look like it's used at all in anything and uses a special "PoWiFi router"(?)

https://modernmobile.cs.washington.edu/docs/powifi.pdf

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