Recently burnt out the transformer on my CNC router. Decided to rebuild the drive/stepper power supply. What you're about to see ... is a true story. EDIT TO ADD: I use Gecko Stepper Drives. the formulas & power supply built in this video are done so in accordance with guidelines laid out by Gecko. These may or may not be applicable to your drives or your application. Do your homework & be safe! ------------------------ Mariachiando -- Doug Maxwell/Jimmy Fontanez