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A comment on 4.2″ and 7.5″ NFC-powered e-Paper Displays Work without Battery.

Re:4.2″ and 7.5″ NFC-powered e-Paper Displays Work without B... by eyegor on Tuesday March 17, 2020 @07:50PM (#22611971)
Many people on this thread are complaining about the poor performance of this passively powered screen. PSA if you care about resolution and speed, and don't mind powering it; pick up the ED060KC1 panel. 300ppi 6" panel for around $75, base refresh is 450ms. If you're brave, it seems mostly stable down to 300-350ms. It's the same panel most high end ereaders use.
[ Parent | on HN ]
Re:4.2″ and 7.5″ NFC-powered e-Paper Displays Work without B... by londons_explore on Wednesday March 18, 2020 @03:28AM (#22614402)
If you want the same "NFC updating from an app" ability, a small solar panel, enough to charge a supercap, so you have enough energy to update the screen once per few hours could be the solution. You can still use the NFC power option, just wait longer if you need more frequent refreshes.
[ Parent | on HN ]
Re:4.2″ and 7.5″ NFC-powered e-Paper Displays Work without B... by junky228 on Wednesday March 18, 2020 @12:10AM (#22613538)
when I looked it up I was finding listings for at least $150, what sellers are you getting the $75 estimate from?
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Re:4.2″ and 7.5″ NFC-powered e-Paper Displays Work without B... by eyegor on Wednesday March 18, 2020 @03:36PM (#22620389)
Aliexpress/eBay market prices. You can even get them cheaper than that, it's just that $75 is more available.

https://m.aliexpress.com/wholesale/ED060KC1.html?keywords=ED...

[ Parent | on HN ]
Re:4.2″ and 7.5″ NFC-powered e-Paper Displays Work without B... by gtm1260 on Wednesday March 18, 2020 @03:00AM (#22614299)
Same question here! The cost of these panels for like anyone whos' not a major manufacturer to use is so high it seems. I just wanna make some fun prototypes ya know.
[ Parent | on HN ]