I have no Newtons as yet.
A forum member has promised me a bunch of eMates but ... well, let's just say that thus far the eMates have failed to materialise, so time will tell
There is no doubt in my mind that this voltage regulator will work. The theory is sound, the schematic correct. Once I've tested my (very pretty) PCB layout, I will be able to upload it as a small device that anyone with the technical inclination (and many without) can assemble themselves from readily-available parts.
The following idea is to use the voltage regulator module as the frontend to a custom DC supply that will be a drop-in replacement for the Newton 9W Power Adapter (providing 7.5V at 1.2A) - thankfully the charger itself is "dumb" and so not hard to reproduce functionally.
Of course, Jaycar has these nice project boxes in Bondi Blue that would probably look very nice sitting under an eMate's translucent green shell, but aesthetics are an issue for another day
The Voltage regulation device itself can be powered off any wall-wart that provides anywhere between 500mA and 1.2A at any voltage between 10V and 32V in its current form, though of course I'll make improvements with time.
«Hrm, I wonder what this wire does... *kzrrrt*»
... This warning brought to you by the Horst Burkhardt initiative for Not Frying Your Compact Mac (or yourself.)
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based on minordetail's "Finder icon"