MOSFETS

Objective
The purpose of this experiment is to learn how to use a  MOSFET to control the speed of a motor. By only input some small voltage to the MOSFETS, it output relatively large current. We also use a potentiometer to control the input voltage.

Procedure
Part 1

The goal is to turn on and off the motor by controlling the pot. When we turning the pot, we changing the voltage across the motor and the MOSFET.

Part2:

We replace the pot with a Function Generator. The FG produces Square Waves, and duality was on

 

here is a video we took

http://www.youtube.com/watch?v=XJQfYBNOdgo&feature=youtu.be


Conclusion:
The lab was successful. Both ways controlled voltage, but part 2's method allowed for better speed control than part 1 with the pot. Using the oscilloscope get more detial, not only faster or slower, but also stop and irregular.