ISSN: 2278 – 909X International Journal of Advanced Research in Electronics and Communication Engineering (IJARECE) Volume 4, Issue 10, October 2015 2508 All Rights Reserved © 2015 IJARECE Abstract— This paper presents the design of the low cost voice recognition based home automation system for the physically challenged people suffering from quadriplegia or paraplegia (who cannot move their limbs but can speak and listen) to control the various home appliances and can actuate the bed elevation just by the voice commands according to their need and comfort. The proposed system consists of a voice recognition module, Arduino uno microcontroller, relay circuit to and an adjustable bed. The voice recognition module needs to be trained first before it can be used to recognize commands. Upon successful recognition of voice command the Arduino drives the corresponding load with the help of the relay circuit. The adjustable bed elevation can be set to the three different modes as per the user comfort and need. The accuracy of voice recognition module is also measured in different conditions. The experimental results validate the functions of the proposed system. The results show the system can provide great assistant to the physically challenged people without any third person’s assistances. Index Terms— Home Automation System, Physically Challenged People, Voice Recognition Module V3, Arduino Uno, Adjustable Bed Motorized Jack. I. INTRODUCTION The home automation systems are gaining popularity day by day due to their ease of use and wide operations capabilities. Integrating voice recognition technology to home automation systems make the system more user friendly and easy to operate. Some require home automation system to satisfy their needs and comfort while for physically challenged people it can provide great assistance. There have been several researches and developments on the home automation systems. The voice recognition based home automation system [1] uses the Microsoft speech API running on PC to recognize the voice commands. The RF transreceiver is used to send these commands to the controller to control the various electrical devices. The use of computer makes this system more expensive and difficult to handle. Intelligent home navigation system for disabled and elderly person [2] proposed a system which uses voice recognition module SR-07 for the speech recognition process, an Arduino controller, a wheel chair and a navigation module. The Arduino receives the command from the voice recognition module and move the wheel chair accordingly thus eliminating the need of any third person’s assistance. The voice recognition based home automation system [3] uses Lab VIEW to perform speech recognition and Zigbee module with a controller is used to control the devices wirelessly. The Limitation of the system [1] [3] is the use of the computer which makes system more expensive. [4] Proposed a home automation system which comprises a DSP processor for the voice recognition function, a microcontroller and relay module for the appliances control function like switching lights on-off etc. Zigbee wireless module is used which eliminates the need of additional wiring required for the signal transmission. [5] Proposed a home automation system for elderly and physically challenged people which can control the home appliances by two methods by voice commands or by using mobile as remote controller. The voice recognition is done by the android application and thus given to the controller to control the devices. The home automation system [6] proposed two ways to control home appliances that are by using timer or by using the voice commands. The software environment is developed on Virtual Basics 6.0 on PC and devices are controlled using PC parallel ports. [7] Proposed a Bluetooth based home automation system which comprises of a remote controller interfaced with microcontroller which is additionally interfaced with the Bluetooth module to provide wireless control of the appliances. When key on the remote controller is pressed the controller sends the command via Bluetooth module to the receiver and corresponding action on the receiver side is taken. [8] Proposed system which uses PC to convert the voice commands to text and send this converted text to the cellular network via mobile phone, on receiver side the text is received by another mobile phone and this command is read by the microcontroller and corresponding control action is taken. [9] Proposed a system which can control devices from the large distance. The user voice commands are converted into the symbols and they are sent to server PC over WI-FI network. The PC contains the voice recognition application developed on Microsoft VisualBasic.net. When the given command is recognized this information is transferred to the control circuit through PC parallel port and the corresponding device is turned on or off. Voice Recognition Based Home Automation System for Paralyzed People Mukesh Kumar, Shimi S.L