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SMS BASED UNIVERSAL MOTOR SPEED CONTROLLER

Platform : GSM

Aim: The aim of the project is to build SMS based universal motor speed controller. Description: There are several applications with dc motors in our daily life. We require different speeds at different instants depending on the applications. There are several techniques to control the speed of dc motor; PWM technique is one in those. PWM stands for pulse width modulation. Pulse width modulation (PWM) is a powerful technique for controlling analog circuits with a processor's digital outputs. In this technique we use duty cycle concept for controlling the speed. If motor is given a supply for 10 seconds and it is not given a supply for 90 seconds by using PWM then motor will move with speed 10% of its rated speed and like wise. Global System for Mobile Communication (GSM) is a set of  ETSI standards specifying the infrastructure for a digital cellular service. The standard is used in approx. 85 countries in the world including such locations as Europe, Japan and Australia. In this project we are using wireless GSM network to give the input data to the micro controller through GSM modem. The microcontroller receives the messages from the GSM mobile phone through the modem connected to it. After getting the data, the micro controller will sends a signal to the Motor. According to the Micro controller signal the motor speed will be controlled.

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