Re: [NTLK] Adjustable backlight?

From: LA GREEN (
Date: Fri Jun 28 2002 - 01:09:36 EDT

SO after all that mobo jumbo is anyone going to try it?


>From: "Marco Mailand" <>
>To: <>
>Subject: Re: [NTLK] Adjustable backlight?
>Date: Thu, 27 Jun 2002 08:50:08 +0200
> > How would this work? Could other backlit Newts be modified to do this?
>I've experimented a little bit with a separate white BL kit, that consists
>of a small inverter and a BL foil of about 4 times the MP2k screen size and
>thus consuming much more power. It was possible to dim the brightness from
>totally dark to brightest by adjusting the input voltage or setting a
>current limit at the DC supply. At this particular inverter the output
>frequency changed slightly beside the AC voltage.
>In order to do that in the Newton one would have to modify the inverter
>circuitry, which sits somewhere distributed on the mobo, close to the
>battery tray. It is possible but would at first require re-engineering of
>the schematic of that part and finally modifying parts. A very simple
>approach would be to replace the current limiting resistor of the power
>transistor, which is switching the current thru the inverter coil by an
>adjustable part.
>Any modification like this would require modification of the case to have a
>knob sticking out and would render the modified mobo unique or defect ;-)
>With best regards / Viele Gruesse
>Marco Mailand
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