Am pretty new to coding but find it cool, so i went and bought the (Playknowlogy Arduino Robotcar Starter set)
Built the car and uploaded the pre-written code and tried the car out. It was behaving rather erratic so i sat down and read through the code, fixed some errors in it and tweaked some bits.
It's definitely driving better but it seems there is some error in the code that makes it so it only spins in one direction, and only backwards, never forward.. which makes it crash into stuff while spinning Have spent hours trying to figure out where something is wrong but can't find it. If someone would be able to help id be extatic! Would like the car to drive forward a bit and then check distance forward, left and right and adapt accordingly while avoiding collision.
Link to product & current Code below:
Website is in swedish but hoping y'all get translation in browser 
Original code and instructions can be found on website.
playknowlogy arduino robotcar
#include <Servo.h>
int pinLB=6; // define pin6 as left back connect with IN1
int pinLF=9; // define pin9 as left forward connect with IN2
int pinRB=10; // define pin10 as right back connect with IN3
int pinRF=11; // define pin11 as right forward connect with IN4
int inputPin = A0; // define ultrasonic receive pin (Echo)
int outputPin =A1; // define ultrasonic send pin(Trig)
int Fspeedd = 0; // forward distance
int Rspeedd = 0; // right distance
int Lspeedd = 0; // left distance
int directionn = 0; //
Servo myservo; // new myservo
int delay_time = 250; // set stable time
int Fgo = 8;
int Rgo = 6;
int Lgo = 4;
int Bgo = 2;
// forward
// turn right
// turn left
// back
void setup()
{
Serial.begin(9600);
pinMode(pinLB,OUTPUT);
pinMode(pinLF,OUTPUT);
pinMode(pinRB,OUTPUT);
pinMode(pinRF,OUTPUT);
pinMode(inputPin, INPUT);
pinMode(outputPin, OUTPUT);
myservo.attach(5); // define the servo pin(PWM)
}
void advance(int a) // forward
{
digitalWrite(pinRB,LOW);
digitalWrite(pinRF,HIGH);
digitalWrite(pinLB,LOW);
digitalWrite(pinLF,HIGH);
delay(a * 600);
}
void turnR(int d) //turn right
{
digitalWrite(pinRB,HIGH);
digitalWrite(pinRF,LOW);
digitalWrite(pinLB,LOW);
digitalWrite(pinLF,HIGH);
delay(d * 10);
}
void turnL(int e) //turn left
{
digitalWrite(pinRB,LOW);
digitalWrite(pinRF,HIGH);
digitalWrite(pinLB,HIGH);
digitalWrite(pinLF,LOW);
delay(e * 10);
}
void stopp(int f) //stop
{
digitalWrite(pinRB,LOW);
digitalWrite(pinRF,LOW);
digitalWrite(pinLB,LOW);
digitalWrite(pinLF,LOW);
delay(f * 400);
}
void back(int g) //back
{
digitalWrite(pinRB,HIGH);
digitalWrite(pinRF,LOW);
digitalWrite(pinLB,HIGH);
digitalWrite(pinLF,LOW);
delay(g * 200);
}
void detection() //test the distance of different directions
{
int delay_time = 250; //
delay(200);
ask_pin_F(); // read forward distance
if(Fspeedd < 10) // if distance less then 10
{
stopp(1);
back(2);
}
if(Fspeedd < 25) // if distance less then 25
{
stopp(1);
ask_pin_L();
delay(delay_time);
ask_pin_R();
delay(delay_time);
if(Lspeedd > Rspeedd) //if left distance more than right distance
{
directionn = Rgo;
}
if(Lspeedd <= Rspeedd)//if left distance not more than right distance
{
directionn = Lgo;
}
if (Lspeedd < 10 && Rspeedd < 10) //if left distance and right distance both are less than 10
{
directionn = Bgo;
}
}
else
{
directionn = Fgo; // forward go
}
}
void ask_pin_F() // test forward distance
{
myservo.write(105);
digitalWrite(outputPin, LOW);
delayMicroseconds(2);
digitalWrite(outputPin, HIGH);
delayMicroseconds(10);
digitalWrite(outputPin, LOW);
float Fdistance = pulseIn(inputPin, HIGH);
Fdistance= Fdistance/5.8/10;
Serial.print("F distance:");
Serial.println(Fdistance);
Fspeedd = Fdistance;
}
void ask_pin_L() // test left distance
{
myservo.write(175);
delay(delay_time);
digitalWrite(outputPin, LOW);
delayMicroseconds(2);
digitalWrite(outputPin, HIGH);
delayMicroseconds(10);
digitalWrite(outputPin, LOW);
float Ldistance = pulseIn(inputPin, HIGH);
Ldistance= Ldistance/5.8/10;
Serial.print("L distance:");
Serial.println(Ldistance);
Lspeedd = Ldistance;
}
void ask_pin_R() // test right distance
{
myservo.write(20);
delay(delay_time);
digitalWrite(outputPin, LOW);
delayMicroseconds(2);
digitalWrite(outputPin, HIGH);
delayMicroseconds(10);
digitalWrite(outputPin, LOW);
float Rdistance = pulseIn(inputPin, HIGH);
Rdistance= Rdistance/5.8/10;
Serial.print("R distance:");
Serial.println(Rdistance);
Rspeedd = Rdistance;
}
void loop()
{
myservo.write(105);
detection();
if(directionn == 2)
{
back(3);
turnL(2);
Serial.print(" Reverse ");
}
if(directionn == 6)
{
back(1);
turnR(6);
Serial.print(" Right ");
}
if(directionn == 4)
{
back(1);
turnL(6);
Serial.print(" Left ");
}
if(directionn == 8)
{
advance(1);
Serial.print(" Advance ");
Serial.print(" ");
}
}
