YIKES! That only HALF steps. How crude. Currently (pun intended) I am implementing microstepping using a pair of Allegro 3955 chips. MUCH better....simple too. Try them, you'll like them. BTW: GL, Walt... -----Original Message----- From: Clark, John [mailto:JohnC@ININ.COM] Sent: Wednesday, May 17, 2000 12:29 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: PIC and controlling a stepper motor This is my favorite treatment of the subject: http://www.beowulf.demon.co.uk/serial-stepper.html John Clark Indianapolis, IN -----Original Message----- From: Kosmerchock, Steve [mailto:Steve.Kosmerchock@RFSWORLD.COM] Sent: Wednesday, May 17, 2000 2:21 PM To: PICLIST@MITVMA.MIT.EDU Subject: PIC and controlling a stepper motor Friends, I looked at piclist.com but the search did not come up with any answers. I also looked at the archive at Iversoft but my search did nothing as well. What I need to do is control a bi-polar stepper motor, fwd and rvs. Does anybody know of information (tutorial, code examples,...etc) or has any info that would be willing to share with me. I will be using the ST ( and ALLEGRO) 6219 stepper motor driver with a PIC16F874-20/P. Any help/advice would be greatly appreciated. Thanks alot!! Best regards, Steve Steven Kosmerchock Student/Father/Engineering Technician Radio Frequency Systems Phoenix Arizona USA www.rfsworld.com www.geocities.com/researchtriangle/lab/6584