a$.(10$ pt$.)$ Design a circuit to interface a $5$VDC unipolar stepper motor and a common$-$anode seven$-$

segment display to PC parallel printer port. Show all connections in detail.and give me a picture for the circuit

b$.(15$pt$.)$ For the circuit you have designed using a stepper motor has $90^($@$)$ step$-$angle, write a visual

basic program to run the motor four revolutions in left direction then two revolutions in right

direction. The direction of rotation is displayed on the $7-$segment display as L for left direction

and r for right direction. Place this code in a loop so that this sequence is continuously repeated.