唐赛儿

一、HC-SR501人体红外感应模块

//红外感应
//信号接 7 端口
int ledpin = 7;

void setup()
{
  pinMode(ledpin, INPUT);
  Serial.begin(9600);  // 打开串口，设置波特率为9600 bps
}

void loop()
{
  int in = digitalRead(ledpin);
  Serial.println(in); //有人的时候输出高电平1 无人0
  delay(2000);
} 

二、超声波测距模块

//超声波测距
//Echo 接 arduino.5;Trig 接 arduino.4
//VCC +,END - GND 无需外接电源即可测试

const int TrigPin = 4;
const int EchoPin = 5;

void setup() {
  // initialize serial communication:
  Serial.begin(9600);
}

void loop()
{
  // establish variables for duration of the ping,
  // and the distance result in centimeters:
  long duration, cm;

  // The HC-SR04 is triggered by a HIGH pulse of 2 or more microseconds.
  // Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
  pinMode(TrigPin, OUTPUT);
  digitalWrite(TrigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(TrigPin, HIGH);
  delayMicroseconds(5);
  digitalWrite(TrigPin, LOW);

  // The same pin is used to read the signal from the HC-SR04: a HIGH
  // pulse whose duration is the time (in microseconds) from the sending
  // of the ping to the reception of its echo off of an object.
  pinMode(EchoPin, INPUT);
  duration = pulseIn(EchoPin, HIGH);

  // convert the time into a distance
  cm = microsecondsToCentimeters(duration);

  Serial.print(cm);
  Serial.print("cm");
  Serial.println();

  delay(1000);
}

long microsecondsToCentimeters(long microseconds)
{
  // The speed of sound is 340 m/s or 29 microseconds per centimeter.
  // The ping travels out and back, so to find the distance of the
  // object we take half of the distance travelled.
  return microseconds / 29 / 2;
}

三、直流电机控制模块测试

//直流电机控制
//需要外接电源 5V - 12V
//VCC接 arduino +5，GND 接 arduino GND
//1INA 1INB 分别接 arduino PWM 6，7
int leftmotorpin1 = 7;  // define your motor pins
int leftmotorpin2 = 6;

void setup()
{
  for (int pinindex = 0; pinindex < 14; pinindex++) {
    pinMode(pinindex, OUTPUT);  // set pins 0 to 13 as outputs
  }
  Serial.begin(9600);  // 打开串口，设置波特率为9600 bps
}
void loop()
{
  Serial.println("run");
  digitalWrite(leftmotorpin1, HIGH);
  digitalWrite(leftmotorpin2, LOW);
  delay(5000);
  Serial.println("back");
  digitalWrite(leftmotorpin1, LOW);
  digitalWrite(leftmotorpin2, HIGH);
  delay(5000);
  Serial.println("stop");
  digitalWrite(leftmotorpin1, LOW);
  digitalWrite(leftmotorpin2, LOW);
  delay(3000);
} 

四、带光耦的电机驱动

//需要外接电源 +5V - +12V
//舵机接5+ arduino.GND  型号端接 arduino.PWM 9
#include <Servo.h>
Servo myservo;//定义舵机变量名
void setup()
{
  myservo.attach(9);//定义舵机接口，9或10
  Serial.begin(9600);  // 打开串口，设置波特率为9600 bps
}
void loop()
{
  for(int i=0;i<=18;i++)
  {
    myservo.write(i * 10);//设置舵机旋转的角度
    Serial.println(i * 10);
    delay(1000);
  }
}

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引用：极客工坊