“Wait, was that 423 or 424?” When you’re stuck winding a transformer or coil that has more than a few hundred turns, you’re going to want to spend some time on a winding jig. This video, embedded ...

This will probably be more useful to custom speaker builders, but coil winding has always been a bit tedious. [iwicom] put together a simple coil winder using a hand drill, a magnet, a reed switch ...