> >David, there is little to be gained by using chopping >with such a low supply voltage. What voltage and current >motors are you using? Maybe if you explain more you >might get more responses on this one? :o) >-Roman It's a 5 ohm motor, bipolar windings, running from a 6-8.5V supply. The motor wants 0.5A. I don't want to spend any more power than I must in driving it, since this is a battery operated application. -- Dave's Engineering Page: http://www.dvanhorn.org Got a need to read Bar codes? http://www.barcodechip.com Bi-directional read of UPC-A, UPC-E, EAN-8, EAN-13, JAN, and Bookland, with two or five digit supplemental codes, in an 8 pin chip, with NO external parts. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu