CẢM BIẾN LỰC FSR402 10KG CHO ARDUINO

CODE TEST CẢM BIẾN LỰC

int fsrPin = 0;     // the FSR and 10K pulldown are connected to a0

int fsrReading;     // the analog reading from the FSR resistor divider

int fsrVoltage;     // the analog reading converted to voltage

unsigned long fsrResistance;  // The voltage converted to resistance

unsigned long fsrConductance;

long fsrForce;       // Finally, the resistance converted to force

void setup(void) {

  Serial.begin(9600);   // We'll send debugging information via the Serial monitor

}

void loop(void) {

  fsrReading = analogRead(fsrPin);  

  Serial.print("Analog reading = ");

  Serial.println(fsrReading);

  // analog voltage reading ranges from about 0 to 1023 which maps to 0V to 5V (= 5000mV)

  fsrVoltage = map(fsrReading, 0, 1023, 0, 5000);

  Serial.print("Voltage reading in mV = ");

  Serial.println(fsrVoltage);  

  if (fsrVoltage == 0) {

    Serial.println("No pressure");  

  } else {

    // The voltage = Vcc * R / (R + FSR) where R = 10K and Vcc = 5V

    // so FSR = ((Vcc - V) * R) / V        yay math!

    fsrResistance = 5000 - fsrVoltage;     // fsrVoltage is in millivolts so 5V = 5000mV

    fsrResistance *= 10000;                // 10K resistor

    fsrResistance /= fsrVoltage;

    Serial.print("FSR resistance in ohms = ");

    Serial.println(fsrResistance);

    fsrConductance = 1000000;           // we measure in micromhos so

    fsrConductance /= fsrResistance;

    Serial.print("Conductance in microMhos: ");

    Serial.println(fsrConductance);

    // Use the two FSR guide graphs to approximate the force

    if (fsrConductance <= 1000) {

      fsrForce = fsrConductance / 80;

      Serial.print("Force in Newtons: ");

      Serial.println(fsrForce);      

    } else {

      fsrForce = fsrConductance - 1000;

      fsrForce /= 30;

      Serial.print("Force in Newtons: ");

      Serial.println(fsrForce);            

    }

  }

  Serial.println("--------------------");

  delay(1000);

}