arduino常规课10--招财猫

1.单词

对比图

占空比

线路图

image.png

#include <Servo.h>
Servo servo_5;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  servo_5.attach(5);
}

void loop() {
  // put your main code here, to run repeatedly:
  servo_5.write(180);
  servo_5.write(0);
}

image.png

电位器范围：0~1023

image.png

#include <Servo.h>
#include<LiquidCrystal.h>

LiquidCrystal mylcd(10,9,5,4,3,2);
Servo sv;
float d;
float checkdistance() { //都是硬性要求
    digitalWrite(13,LOW);
    delayMicroseconds(2); //等待2微秒
    digitalWrite(13,HIGH);
    delayMicroseconds(10); //等待10微秒
    digitalWrite(13,LOW); //让他发一个低-高-低的信号，然后信号就发出去了
    float distance=pulseIn(12,HIGH) /58.00;  //由方波信号返回时间返回距离
    return distance;
}
void setup() {
  // put your setup code here, to run once:
  sv.attach(6);
  Serial.begin(9600);
  d=0;
  pinMode(13,OUTPUT);
  pinMode(12,INPUT);
    mylcd.begin(16,2);
  mylcd.display();
}

void loop() {
  // put your main code here, to run repeatedly:
  d=checkdistance();
  Serial.println(d);
  if(d<=10)
  {
      for(int i=0;i<=180;i++) sv.write(i);
      for(int i=180;i>=0;i--) sv.write(i);
  }
  mylcd.setCursor((16-3)-((16-3)/2),1);
  mylcd.print(d);
  
}

作业

定义三个按钮管脚为a,b,c
代码：

#include <Servo.h>

Servo sv;
void setup() {
  // put your setup code here, to run once:
  sv.attach(6);
  Serial.begin(9600);
  pinMode(a,INPUT);
  pinMode(b,INPUT);
  pinMode(c,INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(a))
  {
          sv.write(45);
          delay(500);
          sv.write(0);
  }
if(digitalRead(b))
  {
          sv.write(90);
          delay(500);
          sv.write(0);
  }
if(digitalRead(c))
  {
          sv.write(180);
          delay(500);
          sv.write(0);
  }
}