I made this project in order to build a surveillance car which can be controlled over Internet or any private network. My objective was to easily and cost effectively do something that can be used for security purposes. My car uses DTMF module which takes it’s input from mobile phone attached to the car, that mobile is not only used to generate DTMF tones but also for the surveillance by providing Live Footage from it’s camera, over the network using AirDroid. Conventionally, any project using DTMF requires call from another cell phone to the one attached to the project, which is not cost effective, but in case of my project I used an android app DTMF Tone Generator which generates DTMF tone, now for this to work I shared my phone’s screen over the network using VNC server, hence cost effective.To make this Idea more effective I mounted the phone on a servo motor. This gave my Camera one degree of freedom, i.e. I can move it left and right without moving the bot.

In present times there are many types of Home Automation Systems which are available in the market. Most of these are simple Home Appliances Controlling Systems like DTMF controlled Home Appliances, GSM based Home Appliances Controlling, RF based Home Appliances Controlling. Here we are going to discuss about TV or DVD Remote Control LED Home / Office Appliances Control (Home Automation System). 

This project uses DTMF technology to control home appliances. DTMF stands for Dual Tone Multi Frequency.This DTMF based system can control home appliances via mobile phone communication from anywhere around the world.This facilitates the user to operate anything on his fingertips.It requires two cell phones to operate properly; one of them will always remain in touch with the circuit and another to place a call on that phone. 

{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.

This is the ultimate industrial remote control with 16 different channels and a very high range of more than 1 Km. Let us see the main features of this remote control system: Single chip DTMF based FM transmitter with 16 different channels. Programmable, multi functional, DTMF based FM receiver because of 89C51. Perfectly suits with…

You may have come across many schematics and projects about a cell phone controlled land rover in many websites. But this is not the same.This article will show you how to make a cell phone controlled land rover without using a micro-controller. You read it right we are not going to use any kind of costly micro-controller for making the rover. Well you must have already come across the usual advantages of cell phone controlled Robot like, interference free communication, long range, etc. The motor driver L293d can control 2 motors bi-bidirectionally and has 4 inputs. The 4 outputs from the decoder IC is fed into the 4 inputs of the motor driver directly without using complicated circuits. Let’s see what’s more beneficial in this robot: Reduced circuit complexity, no need of any Programming, cost is highly reduced. Not everyone can afford a microcontroller along with its programmer and debugger boards. 

“Mr. Watson, I want you here”, Alexander Graham Bell knew so well that he has created a revolution when he said these words after testing his telephone experiment. It was the first of its kind and an invention that revolutionized the way we communicate with people separated by geographic distances and barriers. Years after its invention, telephones have penetrated almost every nook and corner of this world and a large proportion of  these connections are landline phones. Once a luxury, telephones aremore of a habit now, indispensible requirement of any 20th century citizen. 

  [[wysiwyg_imageupload:13665:]] 1. Mechanical                                             1.1 TABLE NAME OF COMPONENT QUANTITY 1. IRON CHESSY 1 PCS. 2.METAL GEARED MOTORS 2 PCS. 3.PLASTIC TYRES 2 PCS. 4. CASTER WHEEL 1PCS. 5.NUT & BOLT 3 PCS.  1.2 Structure…

  BLOCK DIAGRAM  PROJECT OVERVIEW In this project “Cell Phone Operated Land Rover“, the robot is controlled by a mobile phone that makes a call to the mobile phone attached to the robot. In the course of a call, if any button is pressed, a tone corresponding to the button pressed is heard at the…

In telecommunication, a caller needs to dial the number of the callee. The earlier versions of telephones used to have rotary type dials which are now obsolete. Almost all the landline and mobile phone handsets now use pushbutton keypads. Fig. 1: Image of old and new landline telephones What is DTMF? DTMF is a signalling system…