[Noisebridge-discuss] 83c network up and running

jim jim at well.com
Thu Oct 2 23:11:07 UTC 2008


   thank you a lot! 
   (it's been maybe a long time since i've 
looked at these things. i have various devices 
lying around: all of them are the same as 
yours. now i know to check what i'm bringing 
both as to polarity and, as soon as i find 
out, to amperage (seems a good idea to power 
the device even if someone else brings 
another).) 
   more thanks, 
jim 


On Thu, 2008-10-02 at 15:53 -0700, Lamont Lucas wrote:
> I'm looking at my office's linksys WRT54gl wireless router, and the back 
> is clearly marked with a negative sign linking to the outer shielding 
> and the positive sign pointing to the enclosed center dot. 
> 
> I don't mean to argue, I just want to save someone the trouble of 
> bringing the wrong wall wart. 
> 
> (oh, and the one I'm looking at is 1 amp, 12 volts)
> 
> jim wrote:
> >    generally not in the case of the usual wall 
> > wart: positive is on the outside (i know there 
> > are exceptions, i haven't encountered them). 
> >    for most devices, both signal and power 
> > connectors have their external connection as 
> > negative, often tied to the neutral of the 
> > house AC or to the house AC ground lug (more 
> > or less the same thing as far as most 
> > electrons care). 
> >    there's probably some good design reason 
> > opposite orientation in wall warts. 
> >    i am often mistaken. 
> > jim 
> >
> >
> >
> > On Thu, 2008-10-02 at 14:25 -0700, Lamont Lucas wrote:
> >   
> >> jim wrote:
> >>     
> >>> what is the amperage required for the 
> >>> linksys 12V power supply (i'm assuming 
> >>> the standard wall wart with positive 
> >>> external, negative internal connector)? 
> >>>       
> >> uh, other way around, right?  Positive internal, negative external shield?
> >>
> >>
> >>     
> >
> >
> >   
> 




More information about the Noisebridge-discuss mailing list