Robotics is a very interesting field of science and technology. Many advance technology is used to build robot more functional, reliable and compatible. Here we are designing a robot with will be controlled through wireless communication i.e. here is GSM communication. We will use DTMF function of GSM system to control the movement of robot. We will use DTMF decoder is like MT8870D. this is an integrated circuit which converts analog DTMF signal to digital output signal. DTMF analog signal is receive from audio output socket from any GSM mobile phone. Here digital output of the decoder is used to control the motors of robot using appropriate motor drivers like electromagnetic relays or power transistors.
Image : DTMF Controlled Robot model
Working Block Diagram of DTMF Controlled Robot
Working of DTMF controlled robot can be simply explain by following block diagram. This block diagram consist of :
GSM mobile phone
Robot controlling unit
Image : Working Block Diagram of DTMF Controlled Robot or Mobile Controlled Robot
Main Component Used in DTMF Controlled Robot
Robot body frame
Nuts-bots, screws and wassers
Printed circuit board (PCB)
Solder iron and soldering wire
DTMF decoder IC
Advantages of DTMF controlled robot
Very simple circuit
Low cost components
Low power consumptions
Long distance controlling using GSM system
No use of microcontroller
Many controlling keys
Fast working of keys
Future Scope DTMF controlled robot
DTMF controlled robot can be further improved to control more functionalities like pick and place of objects. It can be inbuilt with various sensors like infra-red proximity sensor, ultra-sonic distance measurement. Furthermore, we can also inbuilt camera and GPS tracking system to get more accurate information.
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