driverless car controled by mobile

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DRIVER LESS CAR(robot) DRIVER LESS CAR(robot) Prepared by : Afnan Ali Khan (10-EE- 106) Atif Akthar (10- EE-110) Fazal Fawad (10-EE- 161) GUIDED BY: Engr. Hassan Bhatti

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Page 1: Driverless car controled by mobile

DRIVER LESS CAR(robot) DRIVER LESS CAR(robot)

Prepared by :

Afnan Ali Khan (10-EE-106)

Atif Akthar (10-EE-110)

Fazal Fawad (10-EE-161)

GUIDED BY:

Engr. Hassan Bhatti

Page 2: Driverless car controled by mobile

In this project, 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 other end of the call. This tone is called ‘dual-tone multiple-frequency’ (DTMF) tone.

The robot perceives this DTMF tone with the help of the phone stacked in the robot.

The received tone is processed bythe microcontroller with the help of DTMF decoder MT8870.

Project overview

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BLOCK DIAGRAMBLOCK DIAGRAM

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CIRCUIT DIAGRAM

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PIN DIAGRAM

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IC 8870

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A DTMF TELEPHONE KEYPAD

The contemporary keypad is laid out in a 3×4 grid, although the original DTMF keypad had an additional column for four now-defunct menu selector keys. When used to dial a telephone number, pressing a single key will produce a pitch consisting of two simultaneous pure tone sinusoidal frequencies. The row in which the key appears determines the low frequency, and the column determines the high frequency. For example, pressing the '1' key will result in a sound composed of both a 697 and a 1209 hertz (Hz) tone. The original keypads had levers inside, so each button activated two contacts. The multiple tones are the reason for calling the system multi-frequency. These tones are then decoded by the switching center to determine which key was pressed.

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The mobi le that makes a call to the mobile phone stacked in the robot acts as a remote. So this simple robotic project does not require the construction of receiver and transmitter units. DTMF signaling is used for telephone signaling over the line in the voice-frequency band to the call switching centre. The version of DTMF used for telephone tone dialing is known as ‘Touch-Tone.’DTMF assigns a specific frequency (consisting of two separate tones) to each key so that it can easily be identified by the electronic circuit. The signal generated by the DTMF encoder is a direct algebraic summation, in real time, of the amplitudes of two sine (cosine) waves of different frequencies, i.e., pressing ‘5’ will send a tone made by adding 1336 Hz and 770 Hz to the other end of the line. The tones and assignments in a DTMF system are shown in Table I.

DTMF

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ADVANTAGES

1. Wireless control

2.There is no range limit as we can control from anywhere in the world.

3. Takes in use of the mobile technology which is almost available everywhere.

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APPLICATIONSAPPLICATIONS

1) SCIENTIFIC

Remote control vehicles have various scientific uses including working in hazardous environments, deep ocean, and space exploration.

2)MILITARY AND LAW ENFORCEMENT

Usage of remotely controlled military vehicles in the Winter War .

3) SEARCH AND RESCUE

 Robot will likely play an increased role in search and rescue in the future.

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