用arduino写一个循迹小车的程序

好的，以下是一个简单的用Arduino编写的循迹小车程序：

int leftPin = 2; // 左侧传感器引脚
int rightPin = 3; // 右侧传感器引脚
int leftMotorPin = 5; // 左侧电机引脚
int rightMotorPin = 6; // 右侧电机引脚

void setup() {
  pinMode(leftPin, INPUT);
  pinMode(rightPin, INPUT);
  pinMode(leftMotorPin, OUTPUT);
  pinMode(rightMotorPin, OUTPUT);
}

void loop() {
  int leftSensor = digitalRead(leftPin);
  int rightSensor = digitalRead(rightPin);

  if (leftSensor == HIGH && rightSensor == HIGH) { // 直行
    digitalWrite(leftMotorPin, HIGH);
    digitalWrite(rightMotorPin, HIGH);
  } else if (leftSensor == LOW && rightSensor == HIGH) { // 左转
    digitalWrite(leftMotorPin, LOW);
    digitalWrite(rightMotorPin, HIGH);
  } else if (leftSensor == HIGH && rightSensor == LOW) { // 右转
    digitalWrite(leftMotorPin, HIGH);
    digitalWrite(rightMotorPin, LOW);
  } else { // 停止
    digitalWrite(leftMotorPin, LOW);
    digitalWrite(rightMotorPin, LOW);
  }
}

这个程序使用两个红外线传感器来检测循迹小车的位置，根据传感器的读数来控制左右电机的转动，从而实现循迹小车的运动。