Page 293 - ARM Based Microcontroller Projects Using MBED

9.7 EXERCISES 279
9.6 SUMMARY

In this chapter we have learned about the following:
• Types of electric motors
• Controlling BDC motors
• Controlling servo motors
• Types of stepper motors
• Controlling unipolar stepper motors

9.7 EXERCISES

1. Explain how the direction of rotation of a BDC motor can be changed.
2. Explain the differences between a BDC motor and a stepper motor.
3. Draw the circuit diagram to show how a bipolar stepper motor can be connected to a
Nucleo-F411RE development board.
4. A unipolar stepper motor with a stepping angle of 10degrees is connected to a Nucleo-
F411RE development board. Write a program to rotate the motor by 90degrees.
5. Explain the differences between a unipolar and a bipolar stepper motor.