Stepper Motor Driver - Block U


        This circuit is designed to drive a bipolar stepper motors.  The A3967SLB is a microstepping driver with built in translator.  It is a powerful device that is capable of driving a bipolar stepper in full, half, quarter, and even eighth steps.  All current sensing and timers are built in using a few peripheral components.  Because our current throttle bodies use a solenoid style IAC motor these outputs are directed to the DB-37 auxiliary jack out the rear frame.