Instructables user [birdycrazy] built a winding rig from a PVC pipe and a bunch of K’Nex. He had recently started a Tesla coil project and needed an efficient way to wind the secondary coil.

This technique might not be the solution to all transformer woes, but makes for an interesting option if your work takes you in the direction of winding transformers. If PCB coils take your ...

Winding up the backswing is basically a simple turn -- whilst at the same time stretching the elastic bands so that when you swing down and through the ball, it's as fast as possible, all the while ...