# MattsAwesomeStuff

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3Instructables36,992Views38CommentsJoined December 23rd, 2008

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• Winding direction does not matter unless you're combining multiple transformers or windings together (in which case, you want the end result to be matched so they add, rather than opposite so they subtract to net zero). Think of a sine wave. The direction you wind determines whether you start at the top, or the bottom. It alternates 120 times per second, so, unless some quirky circuit requires that precise of timing and polarity, it makes no difference. To keep my head straight, I usually try to wrap in the same direction, good habit, less confusing if you want to combine transformers later to make it more powerful.Order of primary or secondary doesn't matter at all. The transformer doesn't have a "top" or "bottom" and it's operation is unaffected by gravity, which i...

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Winding direction does not matter unless you're combining multiple transformers or windings together (in which case, you want the end result to be matched so they add, rather than opposite so they subtract to net zero). Think of a sine wave. The direction you wind determines whether you start at the top, or the bottom. It alternates 120 times per second, so, unless some quirky circuit requires that precise of timing and polarity, it makes no difference. To keep my head straight, I usually try to wrap in the same direction, good habit, less confusing if you want to combine transformers later to make it more powerful.Order of primary or secondary doesn't matter at all. The transformer doesn't have a "top" or "bottom" and it's operation is unaffected by gravity, which is the only way "top" and "bottom" could be defined. Put it on however is convenient. I usually put the primary on first (trapped at the back of the E) because I'm more likely to change the secondary some day, or have to adjust it to fit. Operation-wise it doesn't matter.