PWM (pulse width modulation and H Bridge, motors. (this might get changed to a motor shield)

Student Learning Outcomes

  • Student will learn how to pick a fuse for a simple circuit.
  • Student will know how to calculate Watts from amps and volts.
  • Student will learn to control simple DC motors including their speed and direction using an HBridge?.
  • Student will learn to control Stepper Motors, and Hobby Servos.
  • Student will learn about Pulse Width Modulation (PWM)
Student will integrate motors into a project. 
Student will learn to consider types of movement as an aesthetic parameter.


Lectures, Demonstrations


  • H-Bridge wiring diagram. 
Ohms Law refresh, determining current, sizing fuses.
  • Kirchhoff’s law applied to simple LED circuits.

  • PWM - pulse width modulation for servos and and H Bridges. Apparent voltage for motors compensating for the HBridge? and PWM.
  • Speed control
  • Introduction to capacitance and inductance.
  • flyback diodes


  • H-Bridge 
See if you can figure out how to set up the H-Bridge and get it working with the helpsheets online, if you can't it is certainly OK to get help, but figuring it out yourself will provide a greater reward. The H-Bridge and two motors will be provided.
 Warnings and help will be given to prevent the board from burning out.


  1. Learn to control speed and direction of your DC motors. Demonstrate this in class
  2. Learn to use a hobby servo. Demonstrate this in class.
  3. Learn to use a stepper motor.  Demonstrate this in class. Stepper motors will be available. 

 There is no project for H-Bridge, just the demonstrations. Turn in your code for all three exercises.