电位器控制小灯亮度并用七段显示器显示小灯的亮度数值

电路连接

代码

int la[9][8]={
    
    {
    
    0,1,1,0,0,0,0,0},{
    
    1,1,0,0,1,1,1,0},{
    
    1,1,1,0,1,0,1,0},{
    
    0,1,1,0,0,0,1,1},{
    
    1,0,1,0,1,0,1,1},{
    
    1,0,1,0,1,1,1,1},{
    
    1,1,1,0,0,0,0,0},{
    
    1,1,1,0,1,1,1,1},{
    
    1,1,1,0,1,0,1,1}};
//记录每个数字对应的接口的电位情况
int leds[]={
    
    0,1,2,3,4,5,6,7};
int a=0,x=0,y=0,h=0;
void setup() {
    
    
  // put your setup code here, to run once:
for(a=0;a<=7;a++){
    
    
  pinMode(leds[a], OUTPUT);
}

}

void loop() {
    
    
   y=analogRead(A0);//获得A0的模拟值
  x=map(y,0,1019,0,8);//转换为1-9
  h=map(y,0,1019,0,255);//转换为0-255
  // put your main code here, to run repeatedly:
  analogWrite(10,h); //将十号引脚的电压以h输出
for (a=0;a<=7;a++){
    
    
  if (la[x][a]==0){
    
    
    digitalWrite(a, HIGH);
  }
  else{
    
    
    digitalWrite(a, LOW);
  }
}
delay(100);

}