The LM-317 is only half of the trick, because you may still have a source
which is too powerful and you will end up with the message "battery toast"
because of the too high current.
This might be the reason for the message you have seen as well.
Normally the Newt accepts input voltages of 7.5 V without any problem.
The solution I am working at is with an LM 200, which does both, constant
voltage mode AND current limitation...
Johannes
> -----Original Message-----
> From: newtontalk-bounce_at_newtontalk.net
> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of Conner Hagan
> Sent: Sunday, November 10, 2002 5:02 AM
> To: newtontalk_at_newtontalk.net
> Subject: Re: [NTLK] Generic AC adapter
> I didn't want to drop a bunch of money on an Apple power supply for my
> Newton either. Instead, I used an LM-317 to regulate a cheap brick.
> I was surprised to find my Newton is unhappy with 7.5V. I got a little
> error dialog that said something like "This power adaptor is supplying
> too much voltage and cannot be used with this newton."
> She seems very happy at about 6.3V (regulated voltage, current limited
> at 1.2A).
>
> She charges my 1800mAh NiMH's (from a different frankenstein-ation)
> quickly.
> --Conner
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