[NTLK] "Mobile" power supply for eMate 300
Victor Rehorst
victor at chuma.org
Tue Aug 23 12:28:53 PDT 2022
Unfortunately Newton devices are real picky and want input pretty much
no less than 6V and no more than 8V - see the FAQ:
https://newtonfaq.com/newton-faq-hardware.html#IIB7
USB-PD negotiation uses those fixed voltages, there's no way to
negotiate something in between - which is a shame.
-V
On 2022-08-23 10:07, Avi Drissman wrote:
> USB C has something called Power Delivery, where a suitably powerful charger can deliver up to 240 W with voltages of 5, 9, 15, 20, 28, 36 or 48V. That’s how laptops charge over USB C. And since it takes just a little negotiation to get those voltages from an adapter capable of sending them, you can get cables with the negotiation chips built in.
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