IFD:Interaktive Elektronik 2012/code

resistive Sensor

Recipe for resistive sensor:

• Pick a resistive sensor
• Measure its lowest and highest resistance using a multimeter.
• Write the name of the sensor and the maximum and minimum resistance on the black board.
• pick a resistor which has the same value as the sensor on its highest value
• Use the below code and create the circuit for a resistive sensor
• open the serial monitor and have a look at the values.
• try larger and smaller resistors and see the difference.
• use an other sensor (one that is already listed on the black board)

Recipe for Potentiometer:

• connect the Potentiometer as displayed on the right.
• use the same program as before for the analog sensor
• see what values you get - compare with values from the resistive sensor.

int mySensorValue;

void setup () {
 Serial.begin(9600);
}

void loop () {
  mySensorValue = analogRead(A0);
  Serial.print("The Sensor Value is: ");
  Serial.println(mySensorValue);
}

switch or Button

int mySensorValue;

void setup () {
 Serial.begin(9600);
 pinMode(13,OUTPUT);
 pinMode(4,INPUT);
}

void loop () {
  mySensorValue = digitalRead(4);
  if (mySensorValue == LOW) {
    Serial.println("The Button is pressed. ");
    digitalWrite(13,HIGH);
  }
  else {
    Serial.println("The Button is not pressed");
    digitalWrite(13,LOW);
  } 
}