WELCOME

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WIRELESS CONTROLLED ROBOTUSING DTMF AND

MICROCONTROLLERDone by:Ch.HarishCh.NarendraT.Bhanu prakashT.Vishnu vardhan

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DTMF decoder3.5mm audio cable (for connecting mobile to DTMF module)M-8870 decoder ICAT89S52Geared dc motorsBattery (10-12 v)11.0592MHz crystalL293D IC (motor driver)Wheel for motors

BILL OF MATERIALS

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PROJECT OBJECTIVE To overcome the problem of NLOS and range

problems Approach Using mobile Technology.

Control the robot movement being anywhere in the world.

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BLOCK DIAGRAM

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DESCRIPTION OF BLOCK DIAGRAM

Cell phone controlled robots are used to operate the robot by using cell phone. By connecting cell phone to the circuit the cell phone can controlled robot through the by the keypad of cell phone.

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CELL PHONE Cell phones are used to give the instruction to the

robot by pressing the keypad of the cell phone. The output of the cell phone controls the robot. By generating dual tone, the dual tone is given to

the DTMF decoder; Decoder decodes the frequency into digital data and

controls the robot.

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DTMF RECEIVER SECTION DTMF receiver section is used to receive the dual

tone coming from the cell phone. It is received by the DTMF and decoded by the

same DTMF IC and given to the microcontroller.

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This DTMF (Dual Tone Multi Frequency) decoder circuit identifies the dial tone from the telephone line and decodes the key pressed on the remote telephone. It employs electronics and computers to support switching operations. DTMF is the ultimate technique used in any of the Mobile, Telephone communication systems.

DTMF DECODER WORKING

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MICROCONTROLLER Microcontroller will receives the decoded digital

data based on received data. Controller is going to control the robot giving

control signal to the motor driver.

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Motor Driver ICs are primarily used in autonomous robotics only because microcontrollers couldn’t supply high current and voltage to motors.We have used L293d ic because it can control 4 motors at atime

DRIVER IC

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CIRCUIT DIAGRAM

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In this project I have used only 5 keys; they are:2 (for forward movement)4 (for moving left) 5 (for stopping the robot) 6 (for moving right)8 (for backward movement)

PROJECT WORKING

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Military and Law Enforcement

Search and Rescue

Scientific

Home appliance control

APPLICATIONS

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FUTURE IMPROVEMENT & SCOPE

IR Sensors

Password Protection

Alarm Phone Dialer

Adding a Camera

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THANK YOU

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QUERIES???

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