Authors : O. Okokpujie Kennedy, Odusami Modupe, P. Okokpujie Imhade and Olusola Abayomi-Alli
Abstract: Electrical devices and appliances cause a lots of problem and havoc if they are not switched off when they are not in use. This study developed a Dual Tone Multiple Frequency (DTMF) technology for the remote control of home appliances. A Dual Tone Multiple Frequency (DTMF) decoder MT8870, a mobile phone, a binary coded decimal decoder, a crystal pulse generator and other components were used for the model and development of the system. The dual tone multiple frequency decoder (MT8870) receives and converts decimal signals to binary. The binary signals are further processed and converted back to binary by the binary coded decimal decoder. The processed signals are then sent to the relay for appropriate switching. Dedicated phone digits send commands to devices/appliances by switching them on or off. The simulation was done using MATLAB 7.0 using accuracy and convergence time as performance metrics. The simulation results showed that the DTMF based home automation has high percentage of accuracy transmitting. The convergence time result showed that signal transmitted took shorter time to converge. In conclusion, the developed model proves to be efficient in controlling home devices/appliances remotely.
O. Okokpujie Kennedy, Odusami Modupe, P. Okokpujie Imhade and Olusola Abayomi-Alli, 2017. A Model for Automatic Control of Home Appliances using DTMF Technique. Research Journal of Applied Sciences, 12: 266-272.