[NTLK] NewtCOM Dongle Update
Matthias Melcher
mm at matthiasm.com
Wed Aug 13 06:01:25 PDT 2025
Thanks, very much appreciated.
> On 13. Aug 2025, at 14:38, Elias Basse <kd5jfe at gmail.com> wrote:
>
> Mathias,
>
> Great work so far on the dongle!
>
> I have been doing a bit of looking at your circuit with regards to the diode.
>
> Since the original newton adaptor is 9W if I am not mistaken, that
> would be 1.28A needed at 7V which will power all cards and charge. I
> am going to look the full circuit to see what the full current
> capacity would be and if there may be a more suitable choice for this.
> Looking at your circuit, it seems like the components are pretty much
> in spec from my point of view (Glancing at a schematic and a datasheet
> for a quick look).
>
> What is the failure mode of these diodes? Do they let out the magic
> smoke? Or do they stop handling current after a bit? Or is it an
> instant failure?
>
> I am going to familiarize myself with your circuit a bit better as
> time permits me and have a look at it over the next few days and do a
> bit of math and research.
>
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