Arduino Smart Car doesn’t turn very well

Projects General Guidance
1

Hello! I just started using Arduino with a robot smart car (made by Elegoo using the Arduino Genuino board). The code I am using works fine, I am using a Bluetooth chip to control the car with my phone. The car goes forward and backwards fine, but when I go left and right it goes just a little bit and then starts to whine. I have seen it go right and left correctly once but I don’t know how I made it do that. Does anyone have any ideas? Thank you!

2

You have not given us much to go on.

How about posting a link to a short YouTube video showing the behaviour and allowing us to hear the noise you mention.

How about telling us how the car works - for example, what mechanism is used for steering?

And anything else you can think of that might help us to help you. We are not mind readers.

...R

3

Look at the code.

Option 1)

Where you see

#define carSpeed 150

Change it to a higher value (up to 255)

The problem with this is that it will cause the initial carSpeed to be faster.

Option 2)

Leave the #define carSpeed 105 the way it is and then later in the code type + and a value that you want to increase the speed by (i.e. if you want it to turn at the fastest speed you would type +105) after carSpeed in the void right and void left sections of the code

Example:

void left(){
analogWrite(ENA,carSpeed+105);
analogWrite(ENB,carSpeed+105);
digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);
digitalWrite(IN3,LOW);
digitalWrite(IN4,HIGH);
Serial.println("Left");
}

void right(){
analogWrite(ENA,carSpeed+105);
analogWrite(ENB,carSpeed+105);
digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
digitalWrite(IN3,HIGH);
digitalWrite(IN4,LOW);
Serial.println("Right");

I hope this helps. I am new at this myself. There may be more elegant ways to do this.

Aloha,

smalinger

4

Hi,
Welcome to the forum.

Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.

Thanks.. Tom... :slight_smile: