DTMF CONTROLLED ROBOT
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- 2. WIRELESS CONTROLLED ROBOT USING DTMF AND MICROCONTROLLER Done by: Ch.Harish Ch.Narendra T.Bhanu prakash T.Vishnu vardhan 2
- 3. DTMF decoder 3.5mm audio cable (for connecting mobile to DTMF module) M-8870 decoder IC AT89S52 Geared dc motors Battery (10-12 v) 11.0592MHz crystal L293D IC (motor driver) Wheel for motors BILL OF MATERIALS 3
- 4. PROJECT OBJECTIVE To overcome the problem of NLOS and range problems Approach Using mobile Technology. Control the robot movement being anywhere in the world. 4
- 6. 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. 6
- 7. 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. 7
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- 9. 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. 9
- 10. 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 DECODERWORKING 10
- 11. 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. 11
- 12. 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 12
- 14. 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) PROJECTWORKING 14
- 15. Military and Law Enforcement Search and Rescue Scientific Home appliance control APPLICATIONS 15
- 16. FUTURE IMPROVEMENT & SCOPE IR Sensors Password Protection Alarm Phone Dialer Adding a Camera 16
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