diff --git a/Bike_Computer-diag.ino b/Bike_Computer-diag.ino
new file mode 100644
index 0000000..f57e949
--- /dev/null
+++ b/Bike_Computer-diag.ino
@@ -0,0 +1,138 @@
+/* Bike Computer V1 - with diagnostics
+
+  Using the serial functions signifigantly increases compiled size, use this if you have a problem in execution or are testing.
+  Use the version without diagnostics in production (once you work out the bugs of course)
+
+  Provides controls to basic functions on a bike, such as turning on and off lights,
+  Measuring distance traveled, average speed, and logs to a microSD card.
+  
+  Future versions will also be able to communicate to other 
+  microcontrollers through the serial interface.
+  
+  Version 1 (This version) will be responsible for detecting ambiant light and ramping
+  up/down the front and rear LED brightness once light levels reach a certain level.
+  Other responsibilities will be blinking pairs of LEDs (front and back) on either side 
+  of the bike to indicate turning.
+  
+*/
+
+// D4 and D5 are reserved for I2C
+
+// Headlight
+const int ambientIn = A0; // Analog input pin that the potentiometer is attached to
+const int headlight = 3; // Analog output pin that the LED is attached to
+const int incrBy = 5; // Amount to increase or decrease LED brightness by
+int sensorValue = 0; // value read from the pot
+int outputValue = 0; // value output to the PWM (analog out)
+
+// Blinkers
+const int lBnkSw = A1; // Left Blinker switch
+const int rBnkSw = A2; // Right Blinker switch
+const int lBnk = 6; // Left Blinker
+const int rBnk = 7; // Right Blinker
+const int bnkSpeed = 500; // in ms, 500 = twice a second
+int lBnkSt = LOW;
+int rBnkSt = LOW;
+int lBnkSwSt = 0;
+int rBnkSwSt = 0;
+unsigned long previousMillis = 0;
+
+
+void setup() {
+  // initialize serial communications at 9600 bps:
+  Serial.begin(9600);
+  Serial.println("Loading bike computer diagnostics.");
+  Serial.println("This computer will log output to the console in the format: key = value\t key = value");
+  
+  // Set out outputs
+  Serial.println("Setting our output pins");
+  pinMode(headlight, OUTPUT);
+  pinMode(lBnk, OUTPUT);
+  pinMode(rBnk, OUTPUT);
+  
+  // Set our inputs
+  Serial.println("Setting our input pins");
+  pinMode(ambientIn, INPUT);
+  pinMode(lBnkSw, INPUT);
+  pinMode(rBnkSw, INPUT);
+  
+  Serial.println("Let the games begin!");
+}
+
+void echo(String key, String value){ // This function logs all information to the console and saves on space without having to repeat itself
+  Serial.print(key);
+  Serial.print(" = ");
+  Serial.print(value);
+  Serial.print("\t");
+}
+
+void headLight(){ // Main function for determining whether or not to ramp up or ramp down the headlight and taillight. Uses ambient light sensor for that
+  sensorValue = analogRead(ambientIn);
+  
+  if(sensorValue <= 45 && outputValue <= 250){
+    outputValue = outputValue + incrBy;
+  }
+
+  if(sensorValue >= 50 && outputValue > 0){
+    outputValue = outputValue - incrBy;
+  }
+  analogWrite(headlight, outputValue);
+  
+  echo("Ambient", String(sensorValue));
+  echo("Headlight", String(outputValue));
+}
+
+void blinker(){ // Controls the blinkers
+  unsigned long currentMillis = millis();
+  
+  // Get info from switches
+  lBnkSwSt = digitalRead(lBnkSw);
+  rBnkSwSt = digitalRead(rBnkSw);
+  
+  // Automatically turn off LEDs if switch is off
+  if(lBnkSwSt == LOW){ digitalWrite(lBnk, LOW); }
+  if(rBnkSwSt == LOW){ digitalWrite(rBnk, LOW); }
+  
+  if(lBnkSwSt == HIGH){ // Test if left blinker switch is on
+    echo("lBlinkSw", "ON");
+     if(currentMillis - previousMillis >= bnkSpeed){
+      previousMillis = currentMillis;   
+      
+      if(lBnkSt == LOW){
+        lBnkSt = HIGH;
+        echo("lBlinker", "ON");
+      }else{
+        lBnkSt = LOW;
+        echo("lBlinker", "OFF");
+      }
+      
+      digitalWrite(lBnk, lBnkSt); // Begin blinking
+    }
+  }
+  
+  if(rBnkSwSt == HIGH){ // Test if right blinker is on
+    echo("rBlinkSw", "ON");
+    if(currentMillis - previousMillis >= bnkSpeed){
+      previousMillis = currentMillis;   
+      
+      if(rBnkSt == LOW){
+        rBnkSt = HIGH;
+        echo("rBlinker", "ON");
+      }else{
+        rBnkSt = LOW;
+        echo("rBlinker", "OFF");
+      }
+      
+      digitalWrite(rBnk, rBnkSt); // Begin blinking
+    }
+  }
+}
+
+void loop() { 
+
+  headLight();
+  blinker();
+  
+  // End of secondary functions, append new line to console
+  Serial.println();
+}