At 12:31 PM 5/11/00, you wrote:
>There is no Vcc pin on a Series III connector. You may be thinking of the
>DSR line which is tied to Vcc via a resistor. If you applied 3.3v to this
>pin, the current would be severely limited heading upstream into your Palm.
>(Not to mention what kind of damage you could do to the Palm's voltage
>regulator if its not already properly protected.)
Are you sure about that? Looking at:
http://www.palmos.com/dev/tech/palmhardware/b1_signals.pdf
I see pin 2 is labelled VCC at 3.3 V. A quick check of one of my Palm III's
confirms that there is 3.3V sitting there, and there is indeed a 330 Ohm
resistor stuck to it since connecting from pin 2 to 10 (gnd) with another
330 R reduces the voltage from pin 2-10 to 1.6 V (about 1/2 of 3.3).
Does anyone know how, for instance, the Palm folding keyboard gets its
power? I imagine it must use extremely little and just feeds directly off
the VCC pin. Or does it use more and is there some sort of regulator in
there? Almost feel like buying one and ripping it apart.
Kris
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