Hi,
my Nokia adaptor died last week. Now I would like to cut the usb-connector off the adaptor and connect it to another one with the same voltage. Problem is the polarity of the usb-connector. It is too small to get the probes of a voltmeter in it, cutting it open is self-defeating and the old adapter of course is kaputt.

Two questions: can it hurt the nokia if I just try it and get it wrong first time? If so, are there other tricks or heuristics I can use? Color of the leads?

Paai

For this kind of things, Google is your friend:

http://pinoutsguide.com/CellularPhon...r_pinout.shtml

If you have to ask, it's better not to try it yourself.

Thanks for the link, but after cutting the the wire from the adaptor to the usb plug I only found a white and a black lead :-(

I /suppose/ that he white corresponds to the positive (red in the diagram), but I still am not certain.

paai

get a female socket? should have more easily accessed soldering parts at the back where the voltmeter would fit.

edit: having a look at the connector, i think the pins are big enough to be touched with a needle -- just resort to the old trick with a wire, a needle and a light. (or sharpen the voltmeter's pikes.)