ON 20110202@5:54:05 AM at page: On a web page you were interested in at: http://techref.massmind.org/Techref/io/speakers.htm# David A Cary[DAV-MP-E62a] edited the page. Difference: http://techref.massmind.org/techref/diff.asp?url=\Techref\io\speakers.htm&version=0 ERROR: Can't email. At least one recipient is required, but none were found. ON 20110202@5:58:26 AM at page: On a web page you were interested in at: http://techref.massmind.org/Techref/io/peripherals.htm# David A Cary[DAV-MP-E62a] edited the page. Difference: http://techref.massmind.org/techref/diff.asp?url=\Techref\io\peripherals.htm&version=2 ERROR: Can't email. At least one recipient is required, but none were found. ON 20110209@9:15:18 PM at page: On a web page you were interested in at: http://techref.massmind.org/Techref/io/embeddedCNCs.htm#40583.8856134259 James Newton[JMN-EFP-786] See also: http://read.pudn.com/downloads45/sourcecode/embed/151169/Motor.c__.htm Demo program for stepper motor control with linear ramps. Hardware: PIC18F252, L6219. The discussion of the method and the math behind it may be found here: http://fab.cba.mit.edu/classes/MIT/961.09/projects/i0/Stepper_Motor_Speed_Profile.pdf ERROR: Can't email. At least one recipient is required, but none were found.