Post AhxfpgdcVCLbaqBAuW by mark@social.cool110.xyz
(DIR) More posts by mark@social.cool110.xyz
(DIR) Post #AhsaIMHLhn83KhFcrQ by notjustbikes@social.notjustbikes.com
2024-05-14T10:39:28Z
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This is a nice touch on the Taipei Airport Metro. Wireless charging!
(DIR) Post #AhsaINO7a68klzQY3U by cody@catboy.baby
2024-05-14T10:44:11.440Z
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@notjustbikes@social.notjustbikes.com I mean I guess it's better than having USB-A sockets like they do in Spain... Like no thank you, I'd rather not plug my phone into an insecure USB port...
(DIR) Post #Aht3AmJztP4OSOEAU4 by notjustbikes@social.notjustbikes.com
2024-05-14T11:35:23Z
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@cody those USB-A sockets charge so slowly anyway. It's annoying that so many trains and buses are being built with these USB ports while the world is moving to USB-PD over USB-C.As for security issues, that's why I used to travel with a charge-only cable (with no data lines at all). They also sell USB condoms, but I have no idea if that's technically possible with USB-PD.
(DIR) Post #Aht3AnAoj1Jx6CwLoW by implicitdeny@todon.nl
2024-05-14T11:56:23Z
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@notjustbikes @cody probably not, as PD relies on establishing a negociation of max power rating supported by both end, so the data channel is mandatory. Preventing this negociation from happening will probably default to low power charging
(DIR) Post #Aht3BaYx64k2HFbojg by notjustbikes@social.notjustbikes.com
2024-05-14T12:04:34Z
1 likes, 0 repeats
@implicitdeny That is what I suspect, too.But you might be able to build some kind of USB-PD relay that would allow PD negotiations but no other data transfer, though I suspect it would be expensive.
(DIR) Post #Aht3FNC2kL37yFhL9c by krt3k@techhub.social
2024-05-14T12:34:57Z
1 likes, 0 repeats
@notjustbikes @implicitdeny There are "USB-PD breakout boards" that allow you to just get a requested voltage and amperage out of a USB-PD power supply and those aren't too expensive iirc, so combining that with another negotiator shouldn't be too expensive
(DIR) Post #Aht3FO63O5qulxu4SO by notjustbikes@social.notjustbikes.com
2024-05-14T12:45:06Z
1 likes, 0 repeats
@krt3k yeah, I know they exist. I own lots of them! 😁But the trickier part is re-negotiating USB-PD to the phone. This isn't rocket science, and just would require a microcontroller and another USB-PD chip, but the cost would add up for a low volume commercial product.
(DIR) Post #Aht3wlY24WzPxQfstU by czhang03@mathstodon.xyz
2024-05-14T11:33:40Z
1 likes, 0 repeats
@cody@notjustbikes Unfortunately wireless charging is still terribly inefficient, and overheats like crazy. IMO it should probably only be used in an emergency. https://www.ifixit.com/News/94409/wireless-charging-trading-efficiency-for-convenience
(DIR) Post #Aht3xr5KyERNQ7lvbk by notjustbikes@social.notjustbikes.com
2024-05-14T11:37:21Z
1 likes, 0 repeats
@czhang03 @cody yes, I know. And it's even worse if you leave the case on.It will still charge faster than USB-A 5V @ 2A (or less!) that is typical on transit.
(DIR) Post #AhxfpgdcVCLbaqBAuW by mark@social.cool110.xyz
2024-05-16T18:32:35Z
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That's basically what all the modern UK trains are like (although current limited rather than the full 13A) , with USB-A only just being for retrofits on older local units. The refurbished 390s have wireless charging, but in addition to mains and USB-A.
(DIR) Post #AhxfsWI5QhhON1SSmW by cody@catboy.baby
2024-05-16T21:40:19.242Z
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@mark@social.cool110.xyz @notjustbikes@social.notjustbikes.com damn okay UK, not bad, not bad