On 04/25/2012 12:10, einreb posted:
I am a little confused as how to physically wire a toroid when I have to make a transformer with one. Assume I have a drawing of a transformer and it shows two windings, one on the left, one on the right. The windings are numbered on the left as 1 on top, 2 on the bottom, and on the right the top is 3 and the bottom is 4. There are 20 turns on the left, 8 turns on the right.
Assume I wire the primary 20 turns, make a twisted loop at the end of say 1'' and keep on going with an other 8 turns to make the secondary. When I later cut and untwist the loop, which is now 3 and 4? Is 3 where I cut the loop or is it 4?
If this is not the way to do it, and I make the primary turns by inserting the wire from the top, do I do the same when I start with the secondary winding? Or do I make the secondary winding by inserting the start of the wire from the bottom?
I appreciate your answer so that I can build the transformer correctly.