07_Analog_Read-(2) 조명센서밝기에 따른 led밝기 조절

#define V0 5.0
#define unit V0/1024
#define R1 10000.0
const int led_0 = 3;
const int analogPin = A0;



void setup() {
  // put your setup code here, to run once: 
  Serial.begin(115200);
  pinMode(led_0,OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  int analogValue = analogRead(analogPin);
  float V2 = analogValue * unit;
  Serial.println(analogValue);
  analogWrite(led_0,map(analogValue,170,1023,0,255));
  
}