The page presents details of the students and the project which I have supervised in BS Electrical Engineering. The projects are related to Electronic Devices, Embedded System, Digital Communications, Signal and Image Processing.
The basic purpose of this project is to generate two outputs (sounds) using single IR transmitter and receiver. Suppose a house consist of two parts so two sound bells are required at the two gates.
The inhabitants of the house want that there would be two different sounds at the door bells so that they can differentiate between these two. In addition to it, there is a deaf person in the house. A light is required inside the house so that he can understand that either the bell is ringing or not. This project will help the people of that house to solve their problems
The project is based on Light Controlled Automatic Light Led’s. It consists of two parts i.e., a light detection part and a led driver and battery charger part. When there is light present, the relay keeps the battery charger circuit intact and keeps it charging until it is charged. As soon as there is dark, the relay shifts and lights up the LEDs through the battery.
This is a circuit to control motor speed using pulse width modulation (PWM). The PWM signal is generated by the 555 timer (IC) and output current amplified by BJT transistor in common emitter configuration. The speed of a motor can be adjusted by this circuit, from 5% to 95%.
This project report is based on the internal circuit of Function Generator. A number of instruments can be found in devices lab. Function generator is one of the most common ones. I have chosen this project to understand the function generator’s working and its internal structure. The designed circuit will give three waves (square, sine and triangle) of variable frequency at output. The detailed analysis of the circuit is done below. The circuit converts DC voltage into three different waveforms. The circuit is able to vary frequency by using rheostats.
The following project is based upon the Lab trainer that is used in an Electronic Devices Lab. This trainer is used to train the novice electrical engineers how to interact with the basic electrical components and to get them ready for their engineering careers.
This project is all about a voice amplification device which can be used in houses, offices and many other places wherever it is required. In this project we are actually transmitting the sound, detected by a very sensitive microphone, through LASER. The sound received by the photodiode is amplified using multistage common emitter amplifiers. The amplified voice then can be heard through a speaker or through hands free.
This project is based on the phenomenon which is basically used in our homes. This phenomenon is basically transferring the water from underground tank to overhead tank when the overhead tank is empty with the help of motor.
So we can use this everywhere in our daily life eg in houses, in offices, in schools etc where water is used on daily basis.
The determination of this project is to build an electronic system which is capable of receiving call signals in a limited area and aware the caller by glowing LED. The main focus of my work is towards the development of a circuit that will give visual signal with the help of LED when it is placed near a mobile phone.
The main objective of this project will indicate and detect any presence of smoke and fire in its surrounding environment. For smoke indication, the main idea is to use the voltage across a LDR (light dependent resistance) as an input to activate a transistor/switch to turn on the indicator
However, for fire indication, negative type thermistor have been used whose resistance decreases with the increase in temperature, so after the resistance has decreased, more current will flow that will be used some how to activate a switch which turns on the indicator/buzzer for fire detection.
The circuit of hand dryer is made using IR transmitter and receiver, relay and Darlington pair of transistors. When we put a hand between the IR transmitter and receiver, the connection is cut off as a result the switch in relay closes and the fan starts. The fan operates on 12 volts DC supply.
The Project of Digital Logic Design Trainer is a training kit of DLD, consists of many helping tools for the electrical engineers to make their circuits for project or for any other purpose. It is suitable for anyone engaged in electronics. Our model contains about 8 modules (tools) for the purpose of help to the students. They include Power Supplies, Logic indicators, Logic Probes, switches, etc.
In this project we have to build circuits which will help to identify bipolar junction transistors (BJT). If the transistor is PNP or NPN, it’s good or bad, its collector current and base current and the voltage across collector-emitter. If the green LED glows in the circuit, it is PNP BJT and red LED glows for NPN BJT. If none of the LED glows it is a bad transistor.
In Circuit 2, the DPDT switch first shows NPN and other shows PNP. The dial will display value of VCE when probes are connected across collector and emitter we have used or voltage measurement and current measurement.
Nowadays with the advancement in technology, smartphones have become very common. But the smarter the phone is the lesser is the battery timing. This becomes a problem at sometimes. For example while travelling if the mobile battery gets low, and we have to contact anyone, and also we have no power source to charge the battery. So my prime purpose is to solve this problem. For this I have designed a mobile charger which charges the battery with AA size cells if we have no power supply. So now this portable device can help us charge our battery anywhere only with AA size cells. Further I modified it so that if we have power supply it charges the battery with that and in the absence of that it charges from cells. In this way I have tried to solve this problem.
The project on which I have worked is “User Authenticated TV Remote Control Jammer”. In this I have designed hardware with the help of which we can jam the infrared signals coming from remote towards the receiver part of television. For this purpose we have used Infrared LED’s whose intensity should be as such that it saturates the signals of IR transmitter from remote control and will not allow them to move towards the TV receiver. Secondly, we have also designed hardware in order to put a password on the jammer. The second has to perform 2 functions. Firstly, it has to activate the circuit whenever the password entered is correct and green LED will glow. Secondly, on entering password wrong 3 times, it has to glow the red LED and the jammer should remain deactivate.
This project is temperature control system with digital thermometer. It operates on 5 volt power supply. I have made it by using temperature sensor, magnitude comparators, relay, some digital and hybrid ICs. This circuit takes range of temperature from user and maintains the room temperature within that range, only we have to connect it with a heater or cooler and give 220 volt to the circuit. It also displays the room temperature.
The purpose of this project is to build and design an electronic communications system which is capable of sending and receiving audio signals within a limited area and connecting countable number of users. The main focus of my work has been towards the development of a circuit which can work as half duplex intercom under a unit box. This was achieved by designing an intercom on a Vero-board with 2 loud speakers and no microphone.
The purpose of this project is to build a device which takes an input from an audio source and amplify from 20 to 200 times of its initial value. Moreover, it also controls the bass and treble of input signal. It uses to amplify the frequencies between 20 Hz to 20,000 Hz. The passive tone controls use to produce the better voice effects in output. Another purpose of this project is to study about the amplification of different frequencies.
In past people use landline or wired system for communication. But that is not a satisfactory way to communicate. So after landline, wireless system was introduced that operates on radio frequency. This wireless system usually used in military operations and local radio stations. But this has a disadvantage that the range of systems operated as wireless control, is very small. So, this type of system also cannot be used for large distances. As technology advanced, we are able to control our appliances through one place. So overcoming this problem, wireless system operated by GSM mobile network was introduced. This one system has a lot of advantage, that for large distances, any appliance can be control through the use of GSM network and DTMF (Dual tone multi frequency), without using microcontroller. Practically it reduces circuit complexity as well as it shows better results.