[NTLK] "Mobile" power supply for eMate 300

[Vladislav Korotnev]

Oh, it's not even Type C but simple USB, as long as it can send out 2.5A. 
Be careful with the polarity though!
I'll keep this option in mind whenever I get to using my Newts again too.

On Wed, 24 Aug 2022 09:59:53 +0200
Alexander Shendi <Alexander.Shendi at web.de> wrote:

> Thank you! I've just ordered one. It should be almost perfect. The eMate has a 7.5V 9W
> power adapter (Same as the MP 2x00, I believe), which are by chance also the specs of
> this thingy. 
> 
> Am 23. August 2022 23:49:56 MESZ schrieb Avi Drissman <avi at drissman.com>:
> >On Tue, Aug 23, 2022 at 3:29 PM Victor Rehorst <victor at chuma.org> wrote:
> >  
> >> 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.
> >>  
> >
> >There actually is, it's called USB PD PPS, and it allows the device to dial
> >in a variable voltage. However, it's very new, and hard to find trigger
> >boards for it.
> >
> >For something like 7.5V you could build off of
> >https://myvolts.com/product/39078/Ripcord_USB_to_7.5V_DC_power_cable_compatible_with_the_Casio_ML-2_Keyboard
> >. I don't know what the socket on the eMate looks like in dimensions or
> >polarity, but there's your voltage.
> >
> >  
> >>
> >> -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.
> >> ----------------------------------------------------------------------
> >>
> >> http://newtontalk.net
> >> http://twitter.com/newtontalk  
> >----------------------------------------------------------------------
> >
> >http://newtontalk.net
> >http://twitter.com/newtontalk