Projects On Embedded Systems

This project checks the finger print of persons and then allows him/her access the specified or secret or personal places or documents in a locker the front end of the project is made in the MATLAB while the backend of embedded system the backend is designed over AT89c51 microcontroller the controller allows the user to access certain cells defined above
only after the front end recognize the finger print the project can also be modified and stated as finger print based door opening system.

This project utilizes an atmel 89c52 microcontroller to monitor the speed of a vehicle the project uses a pair of IR sensor whose output changes as per the movement the output of the sensor pairs are fed to the microcontroller for warning about the over speed microcontroller also warns about the over speed by means of alarm and a dialer system may also be added so that it dials to certain number and informs about the over speeding the sensors are to be mounted over a narrow way so that the test vehicle may pass through it thereby enabling the measurement of time difference for crossing certain distance the speed is the calculated by the formula speed = distance/time.

This project aims to control the position of the dish antenna, which is used, mainly in RADAR and other communication applications. In telecom systems,all information is Fr depended. Now days,the Dish is operating by manually. But this project helps us to operate the DISH automatically. The whole system is microcontroller operated which is overcome the time consumption and frequency error by manual operation. The main control unit is microcontroller AT89C51/AT89c251, the frequency selection is made by matrix keypad and position change is done by stepper motor. The current position of the dish is displaying in 2x16 LCD panel.

In this project we are using smoke sensors whenever this is gas leakage it automatically triggersthe 89c51 microcontroller, which in turn drives an intelligent LCD display, the sensors are based on priority basis, an external circuit may be applied so that the unit automatically dials the fire station. We are providing a voice alarm about the gas leakage a relay circuit in turn automatically trips the plant at the same the microcontroller activates the pump for extinguishing purpose.

This project utilizes photo type smoke sensors.If any of the sensor senses smoke in the compartment,the device takes the following action: -
1. Start the fire alarm or siren.
2. Shut down the plant.
3. Start sprinkling.
4. If supervisor is present in the control room, then he can push a press button to switch OFF the alarm & no further action is taken. If the button is not pressed within 30 seconds of the alarm,the device will dial a pre-stored telephone number. Which you can change at
any time) and It gives the message to the called party, about the emergency. The message can be recorded in your voice.

This robot can sense the commands given from the infrared remote controller and can change its direction of motion. This project can be implemented with two types of technology i.e. the wheel movement can be done using the stepper motor or by means of dc motor the control via the dc motor yields more speed of motion for robot and the controlling is also much efficient when compared with that of the stepper motor based drive when a person directs the IR rays towards the robot the robot starts moving toward the light rays the IR source can be a florescent lamp or an infrared led the sensor used here is basically a TV remote sensor or an photodiode or photo transistor the whole processing and directing the robot is done over by the microcontroller AT89c51.

This robot can sense the commands given from the pc printer port by means of an decoder and can change its direction of motion. B y given key commands from the pc key board this project can be implemented with two types of technology (i.e.) the wheel movement can be done using the stepper motor or by means of dc motor the control via the dc motor yields more speed of motion for robot and the controlling is also much efficient when compared with that of the stepper motor based drive when a control key is pressed from the key board of pc the c program processes it and sends the control signal over the pc printer port the robot starts moving as per the decoded key values the microcontroller controls the overall motion of the robot the pc is used to send the control signals i.e. it acts as front-end of this project. The whole processing and directing of the robot is done over by the microcontroller AT89c51.

This robot can sense the gas leakages in its surroundings while it is moving and can give signals to the control station so as to enable the auto dialing to the police and fire station it can also stop the all over action of the plant. This project can be implemented with two types of technology i.e. the wheel movement can be done using the stepper motor or by means of dc motor the control via the dc motor yields more speed of motion for robot and the controlling is also much efficient when compared with that of the stepper motor based drive when there is presence of gas or smoke over the sensor of robot.it starts alarming and starts to send the warn signals to the control station it can also automatically dial to the fire service or to an specified alert number and say the message of gas leakage the whole processing and directing the robot is done over by the microcontroller AT89c51.

This project helps to control the operation of the lift/crane control-equipment. Shunt wound motors with help of conveyor links that operate lift in our model we are using stepper motors for the lifting mechanism an interactive voice decoder chip announces the floor no and also about overloading. An LCD displays the floor number and a buzzer warns about the overloading.

The cir cuit features automatic exit and entry delays, timed bell cut-off and system reset. It has provision for nor mally open and normally closed switches and will suit the usual input devices (Pressure Mats, Magnetic Reed contacts, Foil Tape, PIRs and Inertia Sensors). When the power is applied, if there's a fault the buzzer will sound and you should switch off again and check for open doors, windows, etc. If everything is in order the buzzer will NOT sound and the exit delay will begin. You have about 30 seconds to leave the building. When you return the buzzer will sound. You then have about 30 seconds to switch off; otherwise the siren will sound. It will go on sounding indefinitely. However, if the building is re-secured the siren will switch off after about 10 minutes and the alarm will reset.

This is a complete alarm system with 5 independent zones suitable for a small office or home environment. It uses just 3 CMOS IC's and features a timed entry/exit zone, 4 immediate zones and a panic button. There are indicators for each zone a "system armed" indicator.The schematic is as follows. Each zone uses a normally closed contact. These can be micro switches or standard alarm contacts(usually reed switches).Suitable switches can be bought from alarm shops and concealed in doorframes, or window ledges.

Once set any contact that opens will trigger the alarm, including Zone1.To prevent triggering the alarm on entry to the building,the concealed re-entry switch must be operated.This will discharge C6 and start the entry timer. The re-entry switch could be a concealed reed switch,located anywhere in a doorframe, but invisible to the eye. The panic switch, when pressed, will trigger the alarm when set. Relay contacts RLA1 provide the latch, RLA2 operate the siren or buzzer.

In this demo model we have made a HDS, which uses RF 27 MHZ communication instead of actual microwave communication. This project actually tracks a HUMAN and gives the area info of that PERSON to the control station thus this project, can also be stated as HUMAN monitor. In this model we provide necessary tower, which resembles similar to a cell phone networking while the vehicle lies inside the coverage of particular tower, the tower name is displayed in an LCD display, which is actually placed in the control station that is few meters away.The TRANSMIITER that is placed with the person emits modulated RF rays, the RF receivers placed in the tower picks the RF rays emitted while the vehicle is inside the coverage range of that particular tower and the each tower is assigned with unique DTMF CODES while IR rays are picked by the tower it in turn generates a DTMF signal which is transmitted to the control station by a low power FM transmitter the FM receiver placed at the control station picks the FM signal and demodulates and retrieves back the DTMF signal. The DTMF decoder placed after the receiver section converts the DTMF tones into binar y codes, the binary data is fed to the microcontroller AT89c51 in turn drives a LCD display, which displays the area information.