But if you’ve ever built one, you know how tedious winding the secondary coil is. So [Krux] decided ... He’s even got a semi-flexible 3D printed motor coupler on the wire-guide axis, to ...

Departing somewhat from this hardware hacking lingua franca is [tuenhidiy]’s automatic coil winder, which instead of aluminum extrusions and 3D-printed ... below shows the machine going through ...