Re: [NTLK] AW: Switching regulator in the 2000

From: speedy2 (speedy2_at_dag.net)
Date: Tue Dec 11 2001 - 03:38:49 EST


On Tue, 11 Dec 2001, Johannes Wolf wrote:

> The "big" switching regulator (dc/dc converter) you can see on the
> logic board near the battery compartment is for generating "high
> voltage" for the display light. It is built in discrete parts using

Right, it's an "inverter" needed to produce the high voltage AC for the EL
backlight. It's possible (and I might attempt) to put one in that is more
recent and hopefully more efficient.

> the transformer which generates the famous wining sound... I do not
> know which regulators are used to stabilize 5V and 3.3V, but probably
> those are linear regulators.>

I doubt the Newton runs of linear regulators, those are too inefficient.
When I do open mine, I'll post all the hardware info I can find.

Thanks,
Speedy2.

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