My Third Project: Smart Tank Chassis

This new toy is just arrived~ It is a smart tank chassis with L9110 on both side. After reading the datasheet and try to understand it with my very limited knowledge, it is a motor driver chip that can control the rotation direction of a motor directly. That means I can play it without using an additional motor shield because it's just embedded in the tank! : D A board is also included in this tank and this makes the project simpler. : )

Parts

Smart Tank, or here

Arduino UNO

Small breadboard

Battery box for AA x 4

Battery box for 9-volt

First Wiring and Testing

I connect IA on the left side to Arduino pin 8 and VCC to + of the battery box. GND is wired to both - of the battery box and Arduino GND. Download the code in elab peers and test it... It moves forward. After that I test IB and it moves backward. I test it again on the other sides and figure out how to control the direction as follow:

Forward: IA on the left side and IB on the right side

Backward: IB on the left side and IA on the right side

Turn left: IB on the left side and IB on the right side

Turn right: IA on the left side and IA on the right side

Second Wiring and Code

I do the wiring again as follow:

IB on the right side > pin 8

IA on the left side > pin 9

IA on the right side > pin 10

IB on the left side > pin 11

Write the simple code that instructs the tanks moving forward, backward, turn left and then turn right for 10 seconds each and then loop again:

int motorPin = 8;
//right side to IB - forward
int motorPin2 = 9;
//left side to IA - forward
int motorPin3 = 10;
//right side to IA - backward
int motorPin4 = 11;
//left side to IB - backward
void setup() {
 Serial.begin (9600);  
 pinMode(motorPin, OUTPUT);
 pinMode(motorPin2, OUTPUT);
 pinMode(motorPin3, OUTPUT);
 pinMode(motorPin4, OUTPUT);
}
void forward(){
   digitalWrite(motorPin, HIGH);
   digitalWrite(motorPin2, HIGH);
   digitalWrite(motorPin3, LOW);
   digitalWrite(motorPin4, LOW);
 }
 void backward() {
   digitalWrite(motorPin, LOW);
   digitalWrite(motorPin2, LOW);
   digitalWrite(motorPin3, HIGH);
   digitalWrite(motorPin4, HIGH);
 } 
 void turnLeft() {
   digitalWrite(motorPin, HIGH);
   digitalWrite(motorPin2, LOW);
   digitalWrite(motorPin3, LOW);
   digitalWrite(motorPin4, HIGH);
 } 
 void turnRight() {
   digitalWrite(motorPin, LOW);
   digitalWrite(motorPin2, HIGH);
   digitalWrite(motorPin3, HIGH);
   digitalWrite(motorPin4, LOW);
 }
void loop () {
  forward();
  delay(10000);
  backward();
  delay(10000);
  turnLeft();
  delay(10000);
  turnRight();
  delay(10000);
}

Yeah! It moves in the same way! I think I can start adding different modules and let it do more job. Thanks for watching again. See you.

My Third Project: Smart Tank Chassis