Center pin negative? Or the center plug?

*REMEMBER* Center pin must be positive. Incorrect polarity will damage the module and may result in personal injury.

The center pin must be NEGATIVE (no, not positive, as the warning reads). So, the correct warning should read:

*REMEMBER* Center pin must be NEGATIVE. Incorrect polarity will damage the module and may result in personal injury.

We regret any inconvenience this may have caused.

>>6
The first post of a thread establishes the topic of the thread.  The second post is guilty of no relevancy to the topic at hand.  Also, it is an asshole jerkface behaviour that deserves rebuke and banishment.  We are here to lounge, not to have bullies behaving as though they own the place.  What kind of fag says "fail" anyway.  A stretched anus fag, that's what kind.