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-   -   Lego RCX Polarity Question (http://www.chiefdelphi.com/forums/showthread.php?t=43450)

SteveO 07-02-2006 02:31

Lego RCX Polarity Question
 
Hey there,

Does anyone know if the DC port on the back of the Mindstorms RCX is tip positive or tip negative? I have tried to determine it, but you can't tell just by looking inside, multimeter tests etc. I already have a 9V adapter with various connectors, it would be great if I could use it for this project and save some cash (college student budget). Just wanting to make sure before I fry one of these. Last semester I fried an instrumentation amp or two by reversing the polarity; an RCX is quite a bit pricier than those.

Thanks!

SteveO 08-02-2006 02:31

Re: Lego RCX Polarity Question
 
Answering my own post, it is tip positive, no suprises.


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