Voice Recognized D.C. Motor Drive

Abstract

Speed controlling of a DC motor is a very important as DC motor is very useful in many industrial applications. The advancement in solid state devices has made DC motor speed regulation easier and smoother. The variation in speed can be easily obtained by the help of PWM technique where the gate pulse monitors the speed. In recent times voice automated systems are becoming very common in our day to day life. The human speech varies in many aspects such as pitch, amplitude and phonetic emphasis from person to person. This makes it difficult to implement a voice automated system but with modern microcontroller unit ATmega328P it is now easy to implement the speech recognized system and by only one command any person can start the motor driver system which rotates the motor. By using this system the direction of rotation of the motor as well as speed of the motor can also be monitored. The voice command from the Aurdino app is received by the HC-05 Bluetooth module, which then transmits it to the ATmega328P microcontroller, which then sends the signal-processed to the motor driving circuit L298N, instructing the MCU. The motor driver circuit rotates the motor accordingly.