An algorithm needs to be developed to find proximity to a location and change the advertisement based on that. Due to the complexity of the project, its better implemented on an embedded linux box. Coupled with GPRS, the advertisements can be updated on the fly, with out even having to stop the vehicle. The different modules of the project include an LED display controller, a GPS module and GPRS handler.
Measuring seismic activity is very essential for predicting earthquakes. Many such measuring devices are placed at various places of the world. But for a better prediction covering an entire area is very important. A collection of zigbee sensor networks can help to do this. Many zigbee enabled seismic sensors can be deployed at various places especially city under grounds to monitor seismic patterns.
The data collected by each sensor will hop through the zigbee network to reach a wifi station from where it will be transmitted to a server. Several such networks deployed across the world sending seismic activity to a central server can be set up. All this data on the server with proper analysis can help in predicting changes in seismic activity and may be and earthquake
2.Dc motors and servo motors are essential components for robotics projects. And most of the robotics projects become really interesting when the projects are wireless also. The most common wireless technology used till now was the FM or RF technology. But there are many disadvantages to using such analogue communication technologies.
3.Bluetooth is a short range digital communication protocol suitable for robotic projects. The remote control consists of a receiver and a transmitter. In this case we can use a standard bluetooth module as the receiver. The transmitter may be custom made from a bluetooth module, or a small program can be written on any smart phones with bluetooth capability. J2me and windows mobile are the best for this purpose. Symbian also can be used.
4.Remote controls can be hacked. Especially the ones that use RF with out any encoding schemes can be hacked very easily. Keyless entry for cars, garage doors etc are the ones which are more venerable to attack. Attackers use custom made handsets which mimick the frequency of the original handset to get the attack done. Rolling code security mechanisms are used to protect wireless remotes from such attacks.
5.The idea is to use a synchronised code. The transmitter and receiver agrees on a particular code for the next transmission. If only that matches in the next transmission will it be accepted. After every successful transmission the code is changed by either the transmitter or the receiver and is then synchronized. In this method no other handset can communicate with the receiver with out knowing the code. The only draw back of this system is that only one handset can be used.
A weather dashboard is a display screen which will show weather information and forecasts for a particular area. The information can be fetched from a local server or a server in the internet. Here the project idea is to make a home weather dash board which shows the weather forecast for the current place and also the current situation. The dash board is basically a TV or an LED matrix display.
6.There will be an embedded system controlling this and the system is wifi. The device will fetch information from the server via the wifi internet connection and then it will format it and display it. The components needed are an access point, a serial to ethernet convertor and powerful microprocessor to handle the complex signals in the case of images.
7.A finger print access control is where the unique finger print of the user is used to recognize the user. Most finger print systems now have memory also also that no external memory interfacing is required. A talking finger print access control where the user interface will use speech out put to direct the user. This is a combination of 2 projects, the finger print access control project and the text to speech project.
The finger print access control project will pull up information from a database and cross check it with the print and then grants access or denies it. With the text to speech module attached to it and with a bit of coding, we can make the system talking. If someone with out access tries his finger, it will saw “You dont have access, sorry”. This is done by sending text info to the text to speech converter by the main microcontroller
8.This is the combination of 2 projects. The RFID access control project and the Text to speech converter project. Both these projects can be done independently and then can be combined together to form this project. The RFID module will detect the RFID cards and will pull up information about the card from a database and provides access or denies it.
Usually LEDs or buzzers are used to indicate the status of the access request. In this project instead of LEDs or buzzers we will use a text to speech converter to produce real human voices. When John, who has access shows his RFID card, the system will check the DB and then greet him with a voice message, “Hello John, welcome to the office”. This is achieved by the main controller of the project sending text information to the text to speech converter. Most of the converters have serial input
ow a days trains have offline signaling. The train driver will have to look for the signal manually and take an action according to the signal available. If by any chance if he misses a signal that can be very fatal. So if there is a direct signaling mechanism to get the signal inside the train itself then its really useful in saving a lot of lives.
9.The concept is to setup a short range transmitter on every signaling pole so that the train can pick up the signal as it approaches the pole. Any of the commercial wireless communication protocols can be used. Wifi or long range bluetooth becomes the best candidates. The signaling poles can be reached through the railnet optical fibre cables or by using satellite relays.
10.
Key less entry is gaining popularity among luxury cars these days. Toyota cars are equipped with keyless entry. In some luxury cars there is no key at all. The driver will carry a small RF device which will transmit a beacon. The receiver in the car can detect this beacon. The receiver is capable of determining the distance of the rf key. The security systems of the car will be deactivated only if the RF key is within a certain distance from the vehicle. Old systems used plain RF communication to make this possible.
But car thief’s became smarter and they started hacking those systems. The next generation featured encoded signals, but they were also not very helpful. Now most of the systems are hybrid ones which cannot be hacked very easily. Modern keyless entry systems feature bluetooth, zigbee etc which can be controlled from mobile phones also
11.
A local positioning system is similar to a GPS system, but restricted to a specified area, usually a building or a campus. Normally local positioning systems are very accurate. Such positioning systems also use the triangulation method to locate a target. The aim of this project is to create wireless positioning system for a school campus and track various costly assets.
The idea is to use a RF positioning where the item under observation will send out a beacon signal periodically. This signal will be picked up by 3 or more strategically placed receivers. The signal strength is used to calculate the distance of the object from the receiver. Getting more than 3 distances and applying it to the distance formule can provide with the exact location of the target.
12.
A thin air mouse glove is a glove that can be used as a pointing device. The is no mouse pad or hard surface, the user wears the glove and waves his hand in thin air and the cursor on the screen moves. The device is basically an accelerometer which measures the acceleration in various directions. All the readings from the accelerometer are taken and the direction of motion is calculated.
This is transmitted to the PC or the host machine via an RF link of a bluetooth link. The PC uses that data to move its mouse cursor. This technology can eliminate costly touch screens which are usually misused by public. Accelerometer mouse can also be very useful in certain industries where touchscreen deployment is not possible
13 payment terminal is a device which is used to make payments with a credit card or a debit card. These devices are very common these days and is found in almost all restaurants, petrol pumps, shopping malls etc. The device communicates with the bank server via a normal PSTN telephone line for verifying the card details and making the payment.
The aim of this project is the make a portable payment terminal making use of the modern mobile technologies. The PSTN communication part of the normal payment terminals can be replaced with a GPRS module. The communication with the server can take place using the GPRS link. Another means is the use the dial up feature. Here the only difference is that the mobile medium is used to get connected with the server.
14.A GPS data logger is a device that can store GPS location information of all the places where the device is taken. This device is very useful for offline tracking of vehicles assets, animals etc. This information can be later transferred to a PC of a plotting device to trace the path followed by the object under observation. The device is essentially a GPS module and a storage medium. The most suitable storage medium is a flash memory. A microcontroller will read GPS information from the GPS module and stores them onto the flash memory. A time stamp is also attached to every reading to complete the trace. Once the data is captured the data is usually transferred to a PC to plot on a map and analyze the data
15.global Positioning System, usually called GPS, is the only fully-functional satellite navigation system. A constellation of more than two dozen GPS satellites broadcasts precise timing signals by radio, allowing any GPS receiver (abbreviated to GPSr) to accurately determine its location (longitude, latitude, and altitude) in any weather, day or night, anywhere on Earth.
GPS has become a vital global utility, indispensable for modern navigation on land, sea, and air around the world, as well as an important tool for map-making and land surveying. GPS also provides an extremely precise time reference, required for telecommunications and some scientific research, including the study of earthquakes. GPS receivers can also gauge altitude and speed with a very high degree of accuracy.
The United States Department of Defense developed the system, officially named NAVSTAR GPS (Navigation Signal Timing and Ranging Global Positioning System), and launched the first experimental satellite in 1978. The satellite constellation is managed by the 50th Space Wing. Although the cost of maintaining the system is approximately US$400 million per year, including the replacement of aging satellites, GPS is available for free use in civilian applications as a public good.
A GPS reciever placed in a car can recieve signals from these satellites and will calculate the exact location of the car in terms of latitude and longitude. This data can be sent to a server that can monitor the location. A GSM modem can be integrated into this project for providing security and remote control. The current location of the car can be found out by sending an SMS. The car can also be disabled by sending an SMS.
GSM/GPRS, Embedded Systems
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