L298N With Arduino Nano Based Bluetooth Control Car.
Circuit Digram.
Arduino Nano Code.
//L293 Connection
const int motorA1 = 3;
const int motorA2 = 4;
const int motorAspeed = 5;
const int motorB1 = 7;
const int motorB2 = 8;
const int motorBspeed =6;
//Useful Variables
int state;
int vSpeed=200; // Default speed, from 0 to 255
void setup() {
// Set pins as outputs:
pinMode(motorA1, OUTPUT);
pinMode(motorA2, OUTPUT);
pinMode(motorB1, OUTPUT);
pinMode(motorB2, OUTPUT);
// Initialize serial communication at 9600 bits per second:
Serial.begin(9600);
}
void loop() {
if(Serial.available() > 0){
state = Serial.read();
}
Serial.println(state);
//Change speed if state is equal from 0 to 4. Values must be from 0 to 255 (PWM)
if (state == '0'){
vSpeed=0;}
else if (state == '1'){
vSpeed=100;}
else if (state == '2'){
vSpeed=180;}
else if (state == '3'){
vSpeed=200;}
else if (state == '4'){
vSpeed=255;}
/***********************Forward****************************/
//If state is equal with letter 'F', car will go forward!
if (state == 'F') {
digitalWrite (motorA1,LOW);
delay(1);
digitalWrite(motorA2,HIGH);
delay(1);
digitalWrite (motorB1,LOW);
delay(1);
digitalWrite(motorB2,HIGH);
analogWrite (motorAspeed, vSpeed);
analogWrite (motorBspeed, vSpeed);
}
/**********************Forward Left************************/
//If state is equal with letter 'I', car will go forward left
else if (state == 'I') {
digitalWrite (motorA1,LOW);
delay(1);
digitalWrite(motorA2,HIGH);
delay(1);
digitalWrite (motorB1,LOW);
delay(1);
digitalWrite(motorB2,HIGH);
analogWrite (motorAspeed, 0);
analogWrite (motorBspeed, vSpeed);
}
/**********************Forward Right************************/
//If state is equal with letter 'G', car will go forward right
else if (state == 'G') {
digitalWrite (motorA1,LOW);
delay(1);
digitalWrite(motorA2,HIGH);
delay(1);
digitalWrite (motorB1,LOW);
delay(1);
digitalWrite(motorB2,HIGH);
analogWrite (motorAspeed, vSpeed);
analogWrite (motorBspeed, 0);
}
/***********************Backward****************************/
//If state is equal with letter 'B', car will go backward
else if (state == 'B') {
digitalWrite (motorA1,HIGH);
delay(1);
digitalWrite(motorA2,LOW);
delay(1);
digitalWrite (motorB1,HIGH);
delay(1);
digitalWrite(motorB2,LOW);
analogWrite (motorAspeed, vSpeed);
analogWrite (motorBspeed, vSpeed);
}
/**********************Backward Left************************/
//If state is equal with letter 'J', car will go backward left
else if (state == 'J') {
digitalWrite (motorA1,HIGH);
delay(1);
digitalWrite(motorA2,LOW);
delay(1);
digitalWrite (motorB1,HIGH);
delay(1);
digitalWrite(motorB2,LOW);
analogWrite (motorAspeed, 0);
analogWrite (motorBspeed, vSpeed);
}
/**********************Backward Right************************/
//If state is equal with letter 'H', car will go backward right
else if (state == 'H') {
digitalWrite (motorA1,HIGH);
delay(1);
digitalWrite(motorA2,LOW);
delay(1);
digitalWrite (motorB1,HIGH);
delay(1);
digitalWrite(motorB2,LOW);
analogWrite (motorAspeed, vSpeed);
analogWrite (motorBspeed, 0);
}
/***************************Left*****************************/
//If state is equal with letter 'L', wheels will turn left
else if (state == 'L') {
digitalWrite (motorA2,HIGH);
delay(1);
digitalWrite(motorA1,LOW);
delay(1);
digitalWrite (motorB2,LOW);
delay(1);
digitalWrite(motorB1,HIGH);
analogWrite (motorAspeed, vSpeed);
analogWrite (motorBspeed, vSpeed);
}
/***************************Right*****************************/
//If state is equal with letter 'R', wheels will turn right
else if (state == 'R') {
digitalWrite (motorA2,LOW);
delay(1);
digitalWrite(motorA1,HIGH);
delay(1);
digitalWrite (motorB2,HIGH);
delay(1);
digitalWrite(motorB1,LOW);
analogWrite (motorAspeed, vSpeed);
analogWrite (motorBspeed, vSpeed);
}
/************************Stop*****************************/
//If state is equal with letter 'S', stop the car
else if (state == 'S'){
analogWrite(motorA1, 0); analogWrite(motorA2, 0);
analogWrite(motorB1, 0); analogWrite(motorB2, 0);
}
}
Tags:
Arduino Bluetooth Car
