//potentiometer reading (v)
int testPin = A0;
int pinDim = 3;
int redPin = 7;
int testValue;
float dimLed;

float V2;
void setup() {
  // put your setup code here, to run once:
pinMode(testPin, INPUT);
pinMode(13, OUTPUT);
pinMode(pinDim, OUTPUT);
Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
testValue = analogRead(testPin);
V2 = (5./1023.)*testValue;
Serial.println(V2);
dimLed = (255./1023.)*testPin;

if(V2>4.0)
{
  digitalWrite(redPin, HIGH);
}
else 
{digitalWrite(redPin, LOW);}

analogWrite(pinDim,dimLed);


delay(250);
}