Sunday, July 18, 2010
Abstract
Many people are worried about their house when they are in distance with their home. They maybe worried about the elcetric equipment in the house. In this project, the Dual Tone Modulation Frequency (DTMF) has been developed to solve the problem in controlling the home appliance from distance. There are some improvement has been made in this project. Regular DTMF system is activating electrical device that only connect or being wired to the DTMF socket. Therefore, this project will make the electrical device that far away from the DTMF can be activated. Thus,this project use a transmitter and receiver to send and receive information to swith On or OFF an electrical device. There are two separate circuit board with a microcontroller (PIC16F876A)each. One board is for transmitter while another is for receiver. Therefore, the main focus is to study the signal transmitter and receiver which are capable of sending sequence of number at regular interval in DTMF format to swith ON or OFF various electrical devices.
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Objective this project to make an improvement on the current DTFM Device Controller which require the appliances to be connected directly to it using 3 pin socket. As most wall socket spread throughout the house, a wireless approach is needed enabling these wall socket to be controlled remotely and locally.
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