Introduction: With the advancement of ages from prehistoric to present day scenario our life has become more sophisticated and busy, so to ease the schedule of this busy life, technology has play the vital role in it and for its proper running of machine the technology has gone further by providing digitization of analog machinery and its use is enhanced day by day. This project is based on the same concept by wireless controlling the machinery through mobile system anywhere from the world. This project aims at Speed Control of AC motor using DTMF method; DTMF stands for dual tone multiple frequencies . The main idea of this project is to control the speed of an AC motor by wireless communication using DTMF decoder technique aiming at the fine use of mobile technology in our day to day use of automated products. Mobile phones have different frequencies for each number printed on it. These numbers when pressed during call duration produces a tone of certain frequency. This frequ...
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