What is the advantage of using the H-bridge in this application over just using a buck regulator? The buck regulator would use just one switching transistor, a "catch diode," an inductor, and an output capacitor. This is assuming the motor only needs to rotate in one direction (no voltage polarity reversal). Harold --=20 FCC Rules Updated Daily at http://www.hallikainen.com Not sent from an iPhone. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .