If you build electronics, you will eventually need a coil. If you spend any time winding one, you are almost guaranteed to think about building a coil winder. Maybe that’s why so many people do.

alias lm7806_to220 lm7808_to220 lm7809_to220 lm7810_to220 lm7812_to220 lm7815_to220 lm7818_to220 lm7824_to220 lm78m05_to220 spx2920u-3.3_to220 spx2920u-5.0_to220 lf15_to220 lf18_to220 lf25_to220 ...