DC Motor Speed Control by Android Application
The project is designed
to control the speed of a DC motor using an 8051 series microcontroller with
android application device. The speed of DC motor is directly proportional to
the voltage applied across its terminals. Hence, if voltage across motor terminal
is varied, then speed can also be varied.
This project uses
the above principle to control the speed of the motor by varying the duty cycle
of the pulse applied to it (popularly known as PWM control). Remote operation is achieved by any
smart-phone/Tablet etc., with Android OS, upon a GUI (Graphical User Interface)
based touch screen operation .The project uses Bluetooth device, interfaced to the
microcontroller, which are used to control the speed of motor. PWM (Pulse Width
Modulation) is generated at the output by the microcontroller as per the
program. The program can be written in Assembly language or in Embedded C. The
average voltage given or the average current flowing through the motor will
change depending on the duty cycle (ON and OFF time of the pulses), so the speed
of the motor will change. A motor driver IC is interfaced to the
microcontroller for receiving PWM signals and delivering desired output for
speed control of a small DC motor.
Further the
project can be enhanced by using power electronic devices such as IGBTs to
achieve speed control higher capacity industrial motors.
PCB LAYOUT:
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