some one help me with my Nitecore i1?

Hey guys so as i said in a previous post i would like companies to supply Australian plugs but they do not and seeing the i1 has a nominal voltage of 100-240 volts it will work fine here in australia.

If i change the plug but of course its not Australian code wiring (derrr no shit Chris!) now i am sure it had a USA plug on it so i could wire like USA standard but i am second guessing my self…

So being smug i thought id pull it apart and rewire the whole thing but it has no marking of positive or negative on the board! it does say in on the board (in) in between the white and black cord.

is their any ways i can check what one is positive and what one is negative?
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idea… GND is usually easier to “trace” looking cold for it, by inspecting the circuit if you can see the traces.

you can ID a chip, look that chip’s datasheet up, and verify exactly which leg is GND… and see which wire goes to a trace that touches the GND trace. (GND usually snakes around a circuit)

ideally, here, you would have verified which BLADE on the ORIGINAL plug was the ground… and carefully followed that side of the power plug down to which solder blob was GND… and noted it.

Thanks mate the black cable comes out of the transformer and into the board and it is marked as ground.

so i am guessing black cable is ground.

Does it matter with AC ?

I know nothing on Aus plugs, but how is there not a commercially available adaptor?

I am confused as to why you could’t just change the plug ? In US we have 2 prong and 3 prong. The 3 prong plugs have 2 power wires and a earth ground. Not sure if its same as your Ground. On US 2 prong plugs it doesn’t matter witch power wire is witch, As we can still flip the older plugs in the outlet and things will still work. Our newer plugs have a fatter blade on one side , and our(newer) outlets have a fatter slot.

I don’t think you want to hook any of your 2 wires to earth ground.

I could be completely wrong

Yea here in aus you can not reverse the plug in any way. its made to go one way only. i wasn’t even sure what side was what the plug had no marking on it.

so did you get it working ?

LOL AC does not have polarity, just change the plug.

I will try it when i get home.
its all done
If ac doesn’t have polarity why is it marked as positive negative and ground?

House AC does have a neutral side which ties into the ground that the powered sine wave side works into. Sometimes the polarity doesn’t matter but why chance it? Just wire as the original plug was and all should be well.

Phil