04-04-2012, 11:24 AM
DTMF controlled ROBO video camera mounted on it
DTMF controlled ROBO video camera mounted on it.pptx (Size: 263.61 KB / Downloads: 36)
Introduction & Methodology
The basic functioning of our project is:
When a call is made to the phone (i.e. receiver) attached to the robot, after answering the call if any key is pressed on the transmitter phone a DTMF tone is produced which is processed by the microcontroller (Atmega 16) and the tone is decoded by the DTMF decoder IC (MT8870). It decodes the tone into its equivalent binary digit and sends the data to the microcontroller, mc is preprogrammed to take decision for each input and outputs to the motor drivers in order to drive the motors in fwd, bwd or turn.
Here the phone making the call is the transmitter. And the one receiving is the receiver. So the simple project does not require the construction of transmitter and receiver units.
one more feature included in this project is that when the power of the bot is switched on a camera mounted on the bot is also turned on which provides live images on a TV at the transmitter side.
Technology used
DTMF
Dual Tone Multi Frequency tone is produced when a key is pressed because of the two frequencies that constitute that key i.e. one is the row frequency and the other one is the column frequency. Which is encoded to its binary equivalent when pressed after the call is received, which is decoded and sent to microcontroller to get an output to drive the motors accordingly.
Objectives of Our Project
The main objectives of this project are:
Design of real time robot.
Wireless control of robot directions and movement.
Forms the surveillance system for combing areas.
Monitors large spaces in industrial environment.
Wireless video transmission over RF.
The learning’s provided by the project are:
DTMF Drivers.
Interfacing DTMF with microcontroller.
DC motors controlling through controller.
Embedded C programming with controller using AVR studio.
PCB design concepts.
Wireless communication.
The major building blocks of the project are:
Microcontroller Mother Boards with regulated power supply.
DTMF drivers.
Robot vehicle with two DC Motors.
Camera.
LED Indicators.
Progress of the Project
As proposed in the synopsis, the project will be completed in three phases:
Hardware Requirements (assembling them)
PCB Designing and Interfacing
Software development and burning it into the microcontroller and final testing of the bot
Assembling of Hardware
The hardware required to construct this project is:
Microcontroller (atmega 16)
Motor driver (L293D)
DTMF Decoder (MT8870 or HT9170)
Camera
Crystal oscillator
Resistors, Capacitors
Power supply, Batteries
Head phone and DC geared motors
TSOP sensor, LDR
Voltage regulator (7805)
PCB Designing & Interfacing
For designing the PCB we use a s/w Diptrace which helps in making the circuit small, efficient and complete.
During the design of PCB we also Interfaced the different components to each other according to the block diagram and the datasheets of different IC’s keeping in mind the inputs and outputs for the microcontroller. The block diagram for this project is:
Software development
This will be the final phase of our project where in will write a program for giving instructions to the bot. The program is written in C language and converted to its Hex code to transfer it to the microcontroller. For this we will use a Software, namely:
Compiler (AVR studio)
Source code
This phase also includes final testing of all coding, interfacing circuit functioning & performance of whole system. If any error is generated then we will try to remove this error by modification on the circuit.