Design of GSM Controlled Electrical Loads
Ogunlewe O.A , Makanjuola N.T , O. Shoewu, Akinyemi L.I
Corresponding Author : Shoewu O,
Department of Electronic and Computer Engineering, Lagos State University, Epe Campus, Epe, Lagos Nigeria.
Email ID : firstname.lastname@example.org
Received : 2015-07-18 Accepted : 2015-08-23 Published : 2015-08-23
Abstract : This GSM controlled electrical loads is designed using the Dual Tone Multi Frequency (DTMF) feature. The system is powered by 5volts dc power supply. The system has three electrical loads in which any load could be up to 2.2KVA. The heart of the system is the DTMF chip that converts keypad tones from a phone into binary. The circuit has two electrical wires; the first is connected to the load supply while the other is connected to a mobile phone within the circuit. A resident phone from any location connects to the mobile phone in order to control the loads, using its keypads to switch on and off the loads. Relays via transistors are connected to its output terminals and they will turn on and off the electrical loads depending on the number that is pressed on the resident phone. When a digital 1 is received by the transistor, it will get saturated, short-circuit the collector and emitter thereby switching on the relay.
Keywords : Dual tone multi frequency (DMTF), GSM controlled loads, Mobile phone, Relay.
Citation : O. Shoewu et al.(2015). Design of GSM Controlled Electrical Loads. J. of Advancement in Engineering and Technology. V3I3. DOI : 10.5281/zenodo.XXXXX
Copyright : © 2015 O. Shoewu. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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