These signals are transferred to the microcontroller, and according to the program written, it sends the command signals to the encoder circuit. At the controlling side, a touch screen allows any user to send the command signals to operate the loads. In this system, a microcontroller is attached to the light loads to control them. This touch-screen based home automation project explains how the automation can be implemented to our homes at lower costs. Touch Screen Based Home Automation System As an example, the GSM based home automation provides the controlling of home equipment by an SMS to the GSM modem.Īs a practical example, the following home automation system project, in which loads are controlled by a touch panel, is very informative. This is the expansion and advancement of wired automation which uses wireless technologies like IR, Zigbee, Wi-Fi, GSM, Bluetooth, etc., for achieving remote operation. Wireless Home Automation Wireless Home Automation The entire operations are centralized by the computer that continuously communicates with the main controller. The equipment is attached with actuators to communicate with the main controller. In this type of automation, all the home equipment is connected to the main controller (programmable logic controller) through a communication cable. Wired Home Automation System Wired Home Automation System However, this system involves a large complexity and necessitates additional converter circuits and devices. This automation is inexpensive and doesn’t require additional cables to transfer the information, but uses existing power lines to transfer the data. There are mainly three types of home automation systems: Implementation of home automation depends on the type of controls like wired or wireless. This is the best solution even for the elderly and disabled persons to operate the equipment. This smart home system also provides continuous monitoring through video surveillance with cameras, scheduling, and energy-saving operations. Communication plays an important role in this home automation system for remote access to these operations. The programmable controller allows connecting various sensors and actuators through various input and output modules whether they are analog or digital.Īctuators are the final controlling devices like limit switches, relays, motors, and other controlling mechanisms which finally control the home equipment. This program can be modified based on load operations. These sensors can be thermocouples or thermistors, photodetectors, level sensors, pressure sensors, current transformers, IR sensors, etc., which need additional signal conditioning equipment to communicate with the main controller.Ĭontrollers may be personal computers/laptops, touchpads, smartphones, etc., attached to the controlling devices like programmable logic controllers that receive the information from the sensors, and based on the program, control the actuators. The sensors detect light, motion, temperature and other sensing elements, and then send that data to the main controlling devices. This system is mainly implemented by sensors, controlling devices and actuators as shown in the figure. Centralized control of lighting equipment, air conditioning and heating, audio/video systems, security systems, kitchen appliances and all other equipment used in home systems is possible with this system. It involves automatic controlling of all electrical or electronic devices in homes or even remotely through wireless communication. With the energy-saving concept, home automation or building automation makes life very simple nowadays. A home automation system makes the operations of various home appliances more convenient and saves energy.
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