DRV8825 Stepper Microstepping Driver

Smoothly position a bipolar stepper down to 1/32 of a full step — the same driver chip behind every entry-level 3D printer and CNC mill.

Difficulty: Through-hole. Estimated build time: about 35 minutes. Estimated parts cost: about US$8.80. 7-part bill of materials with live supplier pricing. A microcontroller-driven bipolar stepper motor with smooth microstepping all the way down to 1/32 of a full step.