SPEECH CONTROLLED AUTOMATION (Using Voice Recognition) Rohit Kankal, TCET kandivali, University Of Mumbai Motivation and Literature survey. The goal of this project is to make a Speech control system using a speech recognition engine and a viable microcontroller (presently Arduino duemilanove :ATMEGA 328). A small microphone interfaced wireless device will be present full-time with User. At present, a Home automation system called as Speech controlled switchboard is made as a prototype. Also, the current Prototype consists of A personal Computer along with Speech recognition development kit as the Base Station (discussed further in Methodology)Physically disabled, amputees and other such differently abled people who face problems in all aspects of day to day life due to the absence of limbs, eyesights etc. Even simple tasks like turning on a fan, light or television often proves to be jeopardy for them. How good would it be if they could just command and do these simple tasks without even the hassles of a giant remote control. We aim to make a high accuracy speech control automized home environment for these specially abled people. Details of implementation :Speech recognition will become the method of choice for controlling appliances, toys, tools and computers. At its most basic level, speech controlled appliances and tools allow the user to perform parallel tasks (i.e. hands and eyes are busy elsewhere) while working with the tool or appliance.. The system is portable and constructed in a way that is easy to install, configure, run, and maintain. A typical wireless home automation system allows one to control house hold appliances from a centralized control unit which is wireless. The project demonstrates a system that can be integrated as a single portable unit and allows one to wirelessly control lights, fans, air conditioners, television sets, security cameras, electronic doors, computer systems, audio/visual equipment’s etc. and turn on or off any appliance that is plugged into a wall outlet, get the status of different sensors and take decision accordingly. Working-Methodology The automation system contains both a base station and a remote station. Each station will be packaged separately and have a separate PCB. BASE STATION (Note: In our Current prototype the speech recognition is done via a microprocessor in PC, along with a speech development kit.) The base station will operate with a +5V power supply. This voltage will be used as the operating voltage for all of the circuit elements in the base station. The microphone in the base station will be picking up audio in a close range. The audio signal from the microphone will be input into the Speech recognition unit. The Speech recognition unit will process the audio and determine if the commands are speech commands and valid then it will pass the commands through microcontroller and ZigBee to remote station where the matched command operation will be performed . A 16 x 2 LCD interfaces with the microcontroller to display the current status of the sensors and relay switches on/off state. A sound alarm is given in the base station as well as in the remote station which indicate the status of water level either water in the tank is overflowing (To off the water motor) or below limit(To on).The speech recognition is directly interfaced with Zigbee. REMOTE STATION :The remote station will operate with same +5 V power supply. The remote station microcontroller receives the digital signal commands from the base station using the Zigbee wireless protocol and performs the request function. On the basis of command signals received it will update the status of relay switches board. It also read the sensors values and update the LCD status on the remote station. The sensors unit is capable of detecting when the user enters or leaves the room by measuring the change in signals strength between the access Point and can accordingly turn on or off appliances such as lights and fans and in the meantime send its status back to base station. Resources used :HM2007 IC or DSP based Circuit (if the product is hardware Based) Alternatively, PC can be used along with - SDK ( speech development kit, Based on Hidden Markov Model) USB (used as a virtual COM port) • Microcontroller . • Zigbee transmitter and receiver • Power circuit, relay circuit, resistor ,crystal, capacitor • Seven segment display, hex keypad. • High Quality and Long Range Microphone Features : 1) Real time switching from Traditional Manual mode to Speech Mode and vice versa 2) Intelligent Failure switching (switch to Manual mode in case of Failure) 3) Wireless system using PAN 4) Password Activation 5) Used as an Add on to existing system , hence no additional wiring or change in wiring. Contribution of the theme of the project:The theme of the Project aims to provide enhancement in technology in automation sector.It is mainly targeted for the ease of Elderly and physically disabled persons , especially the ones who cannot operate household appliances without any aid. Further improvement in this concept include :By using lights, camera and sensors such as light sensor or touch sensor, multi modality can be implemented.Implement functionality that makes use of Text-To-Speech to make a dialogue system. Make use of Internet ; For instance by audio streams, such that an automated machinery can be controlled from a different location.The possibility of training the speech engine to a specific voice was not used. This would probably have increased the performance. Results and Conclusion :Voice recognition Wireless Automation is a very useful project for the adults and physically disabled persons, who are not able to do various activities efficiently when they are at home and need one’s assistant to perform those tasks. With the Voice Recognition along with transreceiver network we can eliminate the complication of wiring in case of wired automation and also it prevent to get up and down again and again to on/off appliances. With the use of Home Automation circuit considerable amount of power saving is possible and it is flexible and compatible with future technologies so it can be easily customized for individual requirements.