   pinMode(readInterrupt, INPUT);
   pinMode(ledPin_inputSPK, OUTPUT);
   pinMode(ledPin_spikesign, OUTPUT);
+  pinMode(outputPin, OUTPUT);
 }
 
 void loop() 

// Temperature sensor
int tempPin = 1;        // Analog temperature sensor pin
int reading;            // Reading from sensor
float NersntEffectCons = 0.05;



// Setting up the serial port

  digitalWrite(ledPin_inputSPK, inCurrent);
  
  // Updating the input current
  double I = .2 + inCurrent*PulseAmplitude;
  
  // Updating the membrane potential
  if ( Not_Resting )
