But if you’ve ever built one, you know how tedious winding the secondary coil is. So [Krux] decided to build a machine to do it for him. He’s currently working on his first Tesla coil — code ...

It is important for machine design engineers to understand how transformers work so they ... The device commonly contains two wire coils: the primary winding and the secondary winding.

but makes for an interesting option if your work takes you in the direction of winding transformers. If PCB coils take your interest, how about a Tesla coil using them?