You can be really lucky that your Newt survived so far:
7.5V @ 700mA means (in case this is not a hitech REGULATED power adaptor)
that the LOWEST voltage at 700mA max will be 7.5 V and if you load it with
less than 700mA, the voltage will rise quickly.
Since the maximum nominal input voltage of the Newt is 7.5V this is
definitely a dangerous behaviour!
I have measured up to 12V out of such adaptors if unloaded...
Of course the Newt is very robust and may survive some overvoltage, but I
can tell you: after I have ripped my first MP2100 totally by accidently
applying 9V to it, I will never perform such experiments again!!!!
The very first thing I do is to take my little voltmeter and check the
output before I connect my Newt.
Cheers
Johannes
> -----Original Message-----
> From: newtontalk-bounce_at_newtontalk.net
> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of John Acuff
> Sent: Friday, November 08, 2002 3:07 AM
> To: newtontalk_at_newtontalk.net
> Subject: Re: [NTLK] Generic AC adapter
<SNIP>
> I use an old Radio Shack adapter that i had laying in my pile of
> "wall-warts". 7.5 VDC @ 700ma, tip +, sleeve-. I did have to change the
> plug to one that matches the Newt (2100).
> Been using it for a couple weeks now with no problems.
> I saw that eBay ad too. Looks like scare tactics to me. As long as the
> voltage and polarity are correct, and the amperage is not too high, I
> see no problems. Unless there is some special circuitry in the original
> adapter that I don't know of.....
> John
>
> "Got Newt!"
>
>
> --
> This is the NewtonTalk list - http://www.newtontalk.net/ for all inquiries
> List FAQ/Etiquette/Terms: http://www.newtontalk.net/faq.html
> Official Newton FAQ: http://www.chuma.org/newton/faq/
>
-- This is the NewtonTalk list - http://www.newtontalk.net/ for all inquiries List FAQ/Etiquette/Terms: http://www.newtontalk.net/faq.html Official Newton FAQ: http://www.chuma.org/newton/faq/
This archive was generated by hypermail 2.1.2 : Mon Dec 02 2002 - 22:02:14 EST