Computer Controlled Robot.(Serial communication)

Serial Communication :- Serial Communication is  the Process of Sending one bit of data at a time, sequentially over the communication channel or Computer bus.

Computer Controlled Robot :-

Component Required :-

1.  2 -Motors 
2. Motor Driver 
3. Arduino  uno
4. Wheels
5. PC

Project Objectives

1. Control the Direction of Robot by pressing any Key from keyword.

Circuit Diagram

Fig :-Circuit Diagram

Connect  the Circuit diagram as shown in Figure.

Connect the Controller Pin from Motor Driver to  6,7,8,9 pin of Arduino.

Connect  the power pin of Motor driver to 5V and GND of  Arduino.

Connect the Motor to the Motor Driver as shown in Figure.

Now Arrange the circuit in the Chasis and Connect the motor with Wheels.

Code

int lm1=6;

int lm2=7;

int rm1=8;

int rm2=9;

void setup() {

  // put your setup code here, to run once:

  pinMode(lm1,OUTPUT);

  pinMode(lm2,OUTPUT);

  pinMode(rm1,OUTPUT);

  pinMode(rm2,OUTPUT);

  Serial.begin(9600);

  Serial.println("press \n forward 8 \n backward 2 \n left 4 \n right 6 \n stop others pin");

}

void loop() {

  // put your main code here, to run repeatedly:

while(Serial.available()==0);

int val= Serial.read()-'0';

if(val==8)

{

  digitalWrite(lm1,HIGH);

  digitalWrite(lm2,LOW);

  digitalWrite(rm1,HIGH);

  digitalWrite(rm2,LOW);

  Serial.println(" \n now moving forward");

}

else if(val==2)

{

  digitalWrite(lm1,LOW);

  digitalWrite(lm2,HIGH);

  digitalWrite(rm1,LOW);

  digitalWrite(rm2,HIGH);

  Serial.println(" \n now moving backward");

}

else if(val==4)

{

  digitalWrite(lm1,HIGH);

  digitalWrite(lm2,LOW);

  digitalWrite(rm1,LOW);

  digitalWrite(rm2,HIGH);

  Serial.println(" \n now moving left");

  

}

else if(val==6)

{

  digitalWrite(lm1,LOW);

  digitalWrite(lm2,HIGH);

  digitalWrite(rm1,HIGH);

  digitalWrite(rm2,LOW);

  Serial.println("\n now moving right");

}

else

{

  digitalWrite(lm1,LOW);

  digitalWrite(lm2,LOW);

  digitalWrite(rm1,LOW);

  digitalWrite(rm2,LOW);

  Serial.println(" \n now stop");

}

Serial.flush();

}

Now upload the Code and open the Serial monitor .

Press 8 :- Robot Moves Forwards

Press 2 :- Robot Moves Backwards

Press 4 :- Robot moves in left direction

Press 6 :- Robot Moves in Right direction

Press any other keys to stop the Robot.

Project Demonstration  at Cosmos Mini Expo.