lvalue required as left operand of assignment SOLVED!

International Deutsch
3

Also hier noch einmal der Vollständige Code. Hatte vorhin nur einen Teil eingefügt.

double sensorPin = A0;   // select the input pin for the potentiometer
double sensorValue = 0;  // variable to store the value coming from the sensor
int dimled = 8;          // pin led to dime
int a;                   // hilfsvariable berechnung
int b;                   // prozentualer wert von senorValue (100% = 50)
int Dauer;


void setup() 
{
  // declare the ledPin as an OUTPUT:
    pinMode(dimled, OUTPUT);
}

void loop() 
{
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin);
  // turn the ledPin on

  sensorValue * 10 = a;
  (100/50) * a = b;         // prozent Helligkeit
  (b/100) * 2 = Dauer;

    
  digitalWrite(dimled, HIGH);
  // stop the program for <sensorValue> milliseconds:
  delay(Dauer);
  // turn the ledPin off:
  digitalWrite(dimled, LOW);
  // stop the program for for <sensorValue> milliseconds:
  delay(2-Dauer);
}

Alle Klammern sind eigentlich da..

Irgendwelche Ideen?