I just did an extensive review of stepper motor drivers. My conclusion was that if you need to go to this range of current, you will need to seriously look into discretes. There are several packages meant to drive discretes directly, esp. from Alllegro and Ericcsson. Let me know if you can't find them easily. -----Original Message----- From: Mike Downey To: PICLIST@MITVMA.MIT.EDU Date: Tuesday, July 27, 1999 8:43 PM Subject: High Current Stepper Motor Controller >We are also doing a PIC based stepper motor controller project, however >our motor needs to have a much higher torque than normal (we are using >it to drive an overhead conveyor to transfer PCBs in a manufacturing >environment). The problem i am having is that I would like to find a >high current bipolar stepper IC that would be easily interfaced with the >PIC using as few output lines as possible. Currently, i am planning on >just constructing an H-bridge on the board and using 4 output lines to >drive the motor. This will work ok, but is not very elegant. Does anyone >have a stepper IC that will handle all the logic and sequencing for me >but can withstand the 5A/phase current requirements of this motor? >-- >----------------------------------------------- >Mike Downey >downeym@bellsouth.net >http://personal.atl.bellsouth.net/~downeym >Panasonic Car Audio - Production Engineering > >Lottery: A tax on people who are bad at math >-----------------------------------------------