The objective of this activity is to control the speed of an electric motor by using a MOSFET.
This is circuit is first assembled
The resistance being output by the potentiometer causes the voltage that is supplied to the motor to vary thereby controlling its speed. the motor turned on when at least 3.9 V were being delivered to it.
We then replaced the potentiometer with a function generator.
We set the function generator to produce square waves at 10 KHz while its duality was set to be on. We then used an oscilloscope to displace the waveform of the motor voltage.
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Lastly,the frequency was reduced to a few Hertz, at which point the motor turns on and off depending on the amplitude of the square-wave.
Finally, both the potentiometer and the function generator were able to achieve motor speed control. The function generator was much more effective due to its increased precision, thereby making specific motor speeds more achievable..
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