In this project we will co
ntrol robotic arm up down, around axis and jaws open and close . we will use GSM technology to move robot forward , backward, left and right.
Our project is to be divided into few parts.
Vehicle control
Robotic ARM
CONCEPT:
In this project we use smart logic and control system of embedded system by using microcontroller. In this project we use ic 89c51 as a main processor.. microcontroller sense the signal and drive the motor of the robotic vehicle. .
Ist circuit is ic 8870. IC 8870 is a bcd to dtmf decoder. So our first part of the circuit is our dtmf decoder. This part is very much necessary, without using this part is not possible to interact with the mobile phone or dtmf based any phone. Whenever we press any switch from the transmitter phone then transmitter transmit some signal as per the switch press. So on every press switch there is a different signal
|
Frequency |
1209 |
1336 |
1477 |
1633 |
|
697 |
1 |
2 |
3 |
A |
|
770 |
4 |
5 |
6 |
B |
|
852 |
7 |
8 |
9 |
C |
|
941 |
* |
0 |
# |
D |
Output of the dtmf decoder is bcd.ur next circuit is how to convert bcd signal into decimal signal. In this project we use ic 74154 as a bcd to decimal decoder circuit. IC 74154 converts the bcd signal into decimal signal . Output of the 74154 is active low.
Output of the 74154 is connected to the 89c2051 microcontroller. Ic 89c2051 microcontroller basically drive the motor for forward and reverse movement.
Output of the microcontroller is connected to the optocoupler circuit. Here in this project we use ic pc 817 as a optocoupler to interface the microcontroller to small slow speed dc gear motor. One gear motor drive the vehicle and second gear motor change the front wheel of vehicle..