if you look around on the internet you find basic diagrams or piictures of transformers that shows there are usually 2 coils primary (in) and secondary (out). I was wondering how do you connect the primary ac coil to a ac powersupply, is it one lead from each end of the coil to each pole + - or do there need to be a resistor , diode or somthing. in front or behind the coil or maybe even the negaive unconnected but doesnt current need to flow to make a magnetic field. ![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)