At 04:19 PM 9/10/97 +0000, Lawrence Lile wrote: >'S ok. I don't need to handle near that much power. Maybe you do... measure the motor resistance and calc the 24V current through it. I recommend designing for this current as that's what will happen when you get a locked rotor or if you step from stopped to full speed. You can go light on the heat sink if your driver can sense an overload and shut down. --------------------------------------------------------------------------- Lynn Richardson - Design Eng.|WA0ZNL |Progress Instruments, Inc. DC - 1GHz, RX, TX 100W, PLL |WA0ZNL.AMPR.ORG |807 NW Commerce Drive ASM 6805, 8051, Z8, PIC |44.46.176.3 |Lee's Summit, MO 64086 C |lrich@proginst.com|P(816)524-4442 F 246-4556