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But my tail light won't light up if the connectors are plugged in one way, but will work if plugged the other way. Surely if the output was AC it wouldn't matter?
cgg-
Interesting. Only safe* answer is to cut it all apart and draw a circuit diagram :)
This thread on YACF suggests that the Luxos U sends a half wave rectified supply to the rear so there's never a negative half of the supply and the Supernova rear light wouldn't work connected in one of the two polarities.
ie in one polarity, the LEDs are fine because they are receiving only positive half-wave pulses and so they will light. In the other polarity they are receiving only negative half-wave pulses and so never see the forward current that will make them light.*not safe for the light...
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I've understood that even with AC the electricity basically comes from one of the wires and in a LED it can only get through in one direction, so if it's on the wrong connerctor, it won't light up.
hamrack
Samuli
Fair. However, the connectors on my rear B&M light (a secula) has no markings on it. The connectors on another B&M rear light I have (topline brake plus) do have markings.
However, I suspect that this may be the same as the older Marathon Supremes. They didn't have a preferred rotation direction so one wasn't marked. People were confused and continually asked them, so they put one on just to shut people up.