Rheilly Phoull said:
If you will be using AC it doesn't matter, if you are talking about the DC
output from a plugpack it would be advisable to check on the Cam board. You
should be able to work out the polarity by looking at the electrolytic
capacitors and following one of the connections to the cable. Most likely
the easiest would be following the common ground tracks.
Assuming it is DC which is almost certain, you need to make sure your
adapter puts out DC and that it's output voltage is close to 12 V.
An unregulated wall adapter may put out much more than the rated output
voltage under a small load. I've seen some go 2X or more! So, both
polarity and output voltage should be checked with a multimeter before
hooking it up and frying something.
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