Introduction 1.1       GENERAL This chapter deals with the objective and unique features of the project and the organisation of the report.   1.2   OBJECTIVE The objective of the project work is to build an aid for physically challenged people to enable them operate normal daily life gadgets easily and conveniently using a voice recognition…

This is a 2 player game, based on 8051 microcontroller AT89S52. This game features two push buttons (one for each player) and an array of 8 LEDs for each. It demands high reflexes, as you have to push button as fast as you can. Each press would help the successive LED to glow until all the 8 LEDs are on.  The competition is about how fast you can toggle (Press and then un-press) the buttons, greater your speed of pressing push button, greater will be your chance of winning. As soon as any of the two players reach the last LED, the push button of another player will get deactivated, which means it will not respond to the push. Also the LEDs of the winner will start toggling. This will ensure the accurate after results. To restart the game, press the reset button (button connected to pin 9 on microcontroller). 

 Mobile controlling is done mainly with DTMF decoder. DTMF stands for Dual Tone Multi Frequency. This module can take up-to 4 bits of data at a time (i.e. 0-15 decimal values).DTMF needs two mobile platforms, one for sending instructions while another for receiving them. This module contains a IC which decodes the signals received and convert it into 4 bit data. 

{C}{C}{C}{C}{C}{C}{C}{C}{C}{C}{C}{C}{C}This project based on DTMF(Dual Tone multi frequency) which generates in cellular cell phones. By using this thing of cell phone we control the home appliances from anywhere in the world(In Network Area). Below you can see the diagram of DTMF keypad. When we press any key then it generates a frequency after mixing two frequencies. And then send it to the receiver end over communication channel.User can activate their devices using this DTMF keypad as he/she want to activate. The encoder encodes the user input and sends via a communication channel. The receiver receives the modulated signal and demodulates it and the user input. In this system, we are going to make a DTMF based home/office appliance. How is the PCB Designed? What dimensions of the code are kept in mind? Continue reading to know more.

You may have seen so many land rover projects on different websites or even on multyremotes.com as moon-walker and robo-vehicle. Most probably they are remote controlled (either IR or RF) or they may be automatic guided vehicles (AGV). This is also remote controlled land rover but as a remote control one can use his cell…

 A simple project using microcontroller AT89S51 to control the speed of 12V fan according to the surrounding temperature. In this project we use the concept of PWM (pulse width modulation) to increase or decrease the speed of fan. We also interface 2*16 characters LCD which shows the outside temperature through the temperature sensor. Followings are…

Now we are going to learn how to make a rain detector with only a LCD and a microcontroller will control your hole circuit. This controller will give you the data that what is the speed of the rain. You can also make a circuit from this that to make water flowing from the pipe this will take the detail of the water flowing from the pipe and tell you the speed of the rain. You can fit it at very far places and the places where you go very less.You can place it in the office, in that office form where you cannot see outside you cannot tell or predict the speed of rain like if you are in a hall or in the mall. You can make a automatic system which can help you to work in the further process. So let’s begin.