Motor speed monitors and control system using GSM modem
The purpose of this
project is to control the speed and direction of DC Motor using
Microcontroller and GSM Modem with password protection. This uses a
PWM Pulse Width Modulation) technique to control the speed of motor
from 0% to 100%. The speed of the motor is measured using
contact-less speed measurement technique. Speed control is done
using PWM (Pulse Width Modulation) method. User can send SMS
messages to control the motor speed and direction. A GSM modem
attached to the control unit handles automatic SMS sending and receiving
process. As this monitoring and controlling can be done by any mobile
phone, we provided a security feature by implementing password-based
protection. User has to send the password along with the commands to be
controlled.
GSM Modem connected to
microcontroller unit is used to control the motor and know the motor
live speed. Microcontroller automatically reads the SMS messages stored
in the SIM card and takes necessary action like speed control, direction
control etc. There will be a particular code that needs to be sent
through SMS to set the speed and get the speed from the DC motor