In this video I'll teach you how to calibrate the VRef for the A4988 and the DRV8825 Stepper motor drivers. For the complete blog post visit: If you liked this video, please Like, Subscribe, click the bell to see all the updates and share our videos. Below you can find the links to all the parts and equipment used in this video. By clicking and buying something from the links below you'll be helping Zero to Hero Engineering with no extra cost to you. Thanks! A4988 Stepstick: DRV8825 Stepstick: Uni-T UT61E Digital Multimeter: Arduino Mega Clone: Ramps 1.6: S-180-12 12V Power supply: 42BYGHW804 Stepper Motor: Precision Screwdriver Set: Crocodile Clips: Blog: Facebook: Enjoyed the video and want to leave a tip to support us? We accept DOGE =) DOGE address: DBhqjHoKALKQMprrHF1eCiq9V4LJvm42f7 To the moon!