Design of Greenhouse Control System Based on Wireless Sensor Networks

Abstract:

       In order to accurately determine the growth of greenhouse crops, the system based on AVR Single Chip microcontroller and wireless sensor networks is developed, it transfers data through the wireless transceiver devices without setting up electric wiring, and the system structure is simple. The monitoring and management center can control the temperature and humidity of the greenhouse, measure the carbon dioxide content, and collect the information about intensity of illumination, and so on. In addition, the system adopts multilevel energy memory. It combines energy management with energy transfer, which makes the energy collected by solar energy batteries be used reasonably. Therefore, the self-managing energy supply system is established. The system has advantages of low power consumption, low cost, good robustness, extended flexible. An effective tool is provided for monitoring and analysis decision-making of the greenhouse environment.

GSM Based SMS Driven Automatic Display Toolkit for College Notice board

Abstract:

       The main aim of the project will be to design a SMS driven automatic display toolkit which can replace the currently used programmable electronic display. It is proposed to design receive cum display toolkit which can be programmed from an authorized mobile phone. The message to be displayed is sent through a SMS from an authorized transmitter. The toolkit receives the SMS, validates the sending Mobile Identification Number (MIN) and displays the desired information after necessary code conversion. The system is made efficient by using ‘clone’ SIMs of same MIN in a geographical area so that the same SMS can be received by number of display boards in a locality using techniques of time division multiple access. Started of as an instantaneous News display unit, we have improved upon it and tried to take advantage of the computing capabilities of microcontroller. We envision a toolkit that will not only display message but also can be used to do some mechanical work. Looking into current trend of information transfer in the campus, it is seen that important notice take time to be displayed in the notice boards. This latency is not expected in most of the cases and must be avoided. It is proposed to implement this project at the institute level. It is proposed to place display boards in major access points. The electronics displays which are currently used are programmable displays which need to be reprogrammed each time. This makes it inefficient for immediate information transfer, and thus the display board looses its importance. The GSM based display toolkit can be used as a add-on to these display boards and make it truly wireless. The display board programs itself with the help of the incoming SMS with proper validation. Such a system proves to be helpful for immediate information transfer

Automatic Night Lamp with Morning Alarm

                                                                                               

                                                                               Abstract:

       This circuit automatically turns on a night lamp when bedroom light is switched off. The lamp remains ‘on’ until the light sensor senses daylight in the morning. A super-bright white LED is used as the night lamp. It gives bright and cool light in the room. When the sensor detects the daylight in the morning, a melodious morning alarm sounds. The circuit is powered from a standard 0-9V transformer. Diodes D1 through D4 rectify the AC voltage and the resulting DC voltage is smoothed by C1. Regulator IC 7806 gives regulated 6V DC to the circuit. A battery backup is provided to power the circuit when mains fail. When mains supply is available, the 9V rechargeable battery charges via diode D5 and resistor R1 with a reasonably constant current. In the event of mains failure, the battery automatically takes up the load without any delay. Diode D5 prevents the battery from discharging backwards following the mains failure and diode D6 provides current path from the battery

                                                                                                                                                                                              

Wait Less Bus Tracking Device

Abstract:

       The Wait Less bus tracking device is a standalone system designed to display the real-time location(s) of the buses. The system will consist of a solar panel and backup battery, wireless module, PSoC microprocessor, and a LED embedded map of the Georgia Tech bus transportation routes. Assembly of these components will enable the tracking device to connect to the Internet to obtain GPS data of the bus locations, which it will depict by activating LEDs in the approximate geographic positions of the buses on the route map. In addition, the device will be portable and sustainable; it will not require an external power source, which will eliminate long-term energy costs. Next Bus, the tracking company that Georgia Tech employs to retain the GPS location of the campus buses, currently provides a $3600 scrolling LED panel installed at three of the bus stops on campus. The display panel provides a rough text-based time estimate of the next arrival of a bus at the particular stop. In a recent survey, conducted by the design team, 75% of the survey correspondents attributed that waiting for the bus has often caused them to be late to a destination. Furthermore, 96% affirmed that if they had an easy way to see each bus’s actual location, in real-time, they could make a more accurate, informed decision of whether or not to wait

Automatic Street Light Control System

Abstract:

       Automatic Street Light Control System is a simple and powerful concept, which uses transistor as a switch to switch ON and OFF the street light automatically. By using this system manual works are removed. It automatically switches ON lights when the sunlight goes below the visible region of our eyes. It automatically switches OFF lights under illumination by sunlight. This is done by a sensor called Light Dependant Resistor (LDR) which senses the light actually like our eyes. By using this system energy consumption is also reduced because now-a-days the manually operated street lights are not switched off properly even the sunlight comes and also not switched on earlier before sunset. In sunny and rainy days, ON time and OFF time differ significantly which is one of the major disadvantage of using timer circuits or manual operation. This project exploits the working of a transistor in saturation region and cut-off region to switch ON and switch OFF the lights at appropriate time with the help of an electromagnetically operated switch. Automatic Streetlight needs no manual operation of switching ON and OFF. The system itself detects whether there is need for light or not. When darkness rises to a certain value then automatically streetlight is switched ON and when there is other source of light, the street light gets OFF. The extent of darkness at which the street light to be switched on can also be tailored using the potentiometer provided in the circuit.

Design of a Voice Recorder using ADC Microcontroller

Abstract:        

            The C8051F411 offers a versatile, small (5 x 5 mm), highly integrated, low-power solution for voice applications. The 12-bit ADC and DAC allow for reasonable quality sound at a 8 kHz sampling rate, and the hardware Accumulation and Burst Mode features of the ADC provide for further improvements with small processing tradeoffs. The Suspend mode operating feature allows the voice recorder to “sleep” while idle, saving power in a similar fashion to the traditional 8051 Stop mode, but still allows the recorder to wake and respond to the user without a hardware reset. This document describes the solution for a telephone-quality voice recorder using the C8051F411.

This document includes the following:

• A description of the system hardware and software

• Usage notes and customization considerations

• A schematic, bill of materials, and detailed layout diagrams

• The implementation of the software showing how to sample, compress, store, and play back a voice signal

RF based Station Name Display and Announcement System

Abstract:

       This project is designed and developed for helping the passengers traveling in train and bus especially during night. The people who are not aware of the station on which one should get down will find this very helpful. Here the station name is displayed and announced simultaneously when the station is about to reach which can assist both literate and illiterate. The RF technology is used in the project to communicate between the transmitter and receiver. Each transmitter has a unique binary code which is transmitted continuously to space in a particular range. This signal is captured by the receiver when it reaches in its range. So in the case of a train, the transmitter placed in the station is detected by the receiver in the train and the binary code is processed to give out the station name display and audio corresponding to the binary code in the receiver. A LCD unit is used for displaying the station name and a speaker is used for the announcement.

MICROCONTROLLER BASED NEURAL NETWORK CONTROLLED LOW COST AUTONOMOUS VEHICLE

INTRODUCTION          

              Autonomous robots with mobile capability are finding their place in numerous application fields. Some typical examples of these application fields are factory automation, service application, and hazardous environments such as dangerous zones in nuclear power stations, space exploration, material handling in hospital and security guarding. The key requirement for performing these tasks is navigation. Navigation is the ability of a mobile robot to reach the target safely without human assistance. Thus the main issues that need to be addressed in mobile robot navigation are reactive obstacle avoidance and target acquisition. Vision based sensing for autonomous navigation is a powerful and popular method due to its ability to provide detailed information of environment which may not be available using combinations of other types of sensors and has been addressed by many researchers. 

DESCRIPTION

Neural navigators perceive their knowledge and skills from a demonstrating action and also suffer from a very slow convergence process and lack of generalization due to limited patterns to represent complicated environment. However, neural networks that can be implemented with relatively modest computer hardware could be very useful. Although the aforementioned techniques successfully solve the robot navigational problem, there always remains a need of lowering the system cost further without compromising much on its efficiency and reliability.        

The navigation task is subdivided into hurdle avoidance and goal seeking tasks. Hurdle avoidance is achieved with the help of one back ultrasonic sensor, two front IR sensors & sonar sensor. The range data from these sensors is fed to inside the microcontroller. Goal seeking behavior involves the data from GPS, GPS receiver which is processed by another microcontroller. In this project for the demo purpose we are giving the goal as left, right, forward commands  because in room environment there will be small changes in the GPS location co ordinates that robot may not consider it as different location . The main microcontroller fetches the desired data and generates motion commands for robot. A GSM modem is interfaced to the main controller for selecting start and goal stations for robot inside the university campus. Neural network simulation will be done by using MATLAB.

8051 architecture based AT89C52 microcontroller from ATMEL is used to implement this project. Microcontroller acts as the heart of this project, which Controls the whole system. It contains 256 RAM, 2k Flash, 2 Timers, 2 external interrupts, 1 UART, 32 GPIO’s, ISP programming support etc. KEIL IDE is used to program the microcontroller and the coding will be done using Embedded C.

BLOCK DIAGRAM