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PIC PWM Controller.

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v

ABStRACT

Nowadays, Microchip PIC has become one of the popular tools in the area of

controller especially in robotics and motor control. The main objective of this project

is to control the speed oflow power DC motor by varying the duty ratio of Pulse

Width Modulation (PWM) waveform, produced by PIC16F877A microcontroller. In

addition, observation of the DC motor performance has been made by investigating

the relationship between PWM frequency and the DC motor performances. MIKRO

C software is used to write and verify the PIC source code inC language. Finally, the

simulation of the controller circuit and the PIC programming has been performed by

using PROTEUS 6 LIFE software. The results show that the speed of the DC motor

is proportional to the PWM duty ratio. The speed of the DC motor will increase if the

duty ratio is increase within a certain limit. Further more, the, voltage spike at the DC '. • 1' ' . "

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