diff --git a/lab_3/main.c b/lab_3/main.c
index bc2776b..506c26a 100755
--- a/lab_3/main.c
+++ b/lab_3/main.c
@@ -25,21 +25,21 @@ void pin_init() {
 }
 
 /** @brief Initializes ADC with required settings
- */
+*/
 void adc_init() {
     /* ADC Settings
-     * Use AVcc as Vref
+     * Use 1v1 reference as Vref
      * Initially set input as GND
      * Data right-adjusted
      * No Interrupts
      */
-	// Set Vref
-	ADMUX |= (1 << REFS1) | (1 << REFS0);
+    // Set Vref
+    ADMUX |= (1 << REFS1) | (1 << REFS0);
     // Set the clock prescaler to 128 (slower ADC means more accurate measurements)
     ADCSRA |= (1 << ADPS2) | (1 << ADPS1) | (1 << ADPS0);
-	
-	// Enable ADC
-	ADCSRA |= (1 << ADEN);
+
+    // Enable ADC
+    ADCSRA |= (1 << ADEN);
 }
 
 /** @brief Blocking function to read an ADC conversion from a selected ADC input.
@@ -83,16 +83,16 @@ int8_t lm35_convert(uint16_t adc_reading) {
  * @return Measured temperature, configure parameters in main.h
  */
 int8_t diode_convert(uint16_t adc_reading) {
-	int16_t value_diff = adc_reading - DIODE_VALUE_25C;
-	int16_t temp_diff = value_diff / DIODE_SENSITIVITY;
+    int16_t value_diff = adc_reading - DIODE_VALUE_25C;
+    int16_t temp_diff = value_diff / DIODE_SENSITIVITY;
     return temp_diff + 25;
 }
 
 int main() {
-	// Initialise display
-	// NOTE: LCD uses PB0-PB6
-	lcd_init(LCD_DISP_ON);
-	
+    // Initialise display
+    // NOTE: LCD uses PB0-PB6
+    lcd_init(LCD_DISP_ON);
+
     // Initialise peripherals
     pin_init();
     adc_init();
@@ -100,31 +100,31 @@ int main() {
 
 
     while (1) {
-		// Reset position
-		lcd_gotoxy(0, 0);
-		
+        // Reset position
+        lcd_gotoxy(0, 0);
+
         // Read LM35 value, and write to LCD
-		uint16_t lm35_value = adc_run_conversion(1);
+        uint16_t lm35_value = adc_run_conversion(1);
         int8_t lm35_temp = lm35_convert(lm35_value);
         // Convert measured value to string
         sprintf(lm35_string, "LM35 : %4d %3dC", lm35_value, lm35_temp);
 
         // Display temp on LCD
         lcd_puts((const char*) lm35_string);
-		
-		lcd_gotoxy(0, 1);
+
+        lcd_gotoxy(0, 1);
 
 
         // Read diode value, and write to 
         uint16_t diode_value = adc_run_conversion(0);
-		int8_t diode_temp = diode_convert(diode_value);
+        int8_t diode_temp = diode_convert(diode_value);
         sprintf(diode_string, "Diode: %4d %3dC", diode_value, diode_temp);
 
         // Display diode info on LCD
         lcd_puts((const char*) diode_string);
-		
+
         // Refreshing too fast can make the data appear weird
-		_delay_ms(500);
+        _delay_ms(500);
     }
-    
+
 }
diff --git a/lab_3/main.h b/lab_3/main.h
index a1e001a..927c168 100644
--- a/lab_3/main.h
+++ b/lab_3/main.h
@@ -7,15 +7,12 @@
 #include <stdio.h>
 #include "lcd.h"
 
-// Comment out to run in "normal" mode
-#define CALIBRATION
-
 #define ADC_VREF            1.1
 #define ADC_RESOLUTION      1023 // (2^ 10 - 1, 10 bits resolution)
 
-#define DIODE_VALUE_25C		436 // ADC value for diode at 0C
-#define DIODE_SENSITIVITY	-1.85 // ADC value / degree C, tuneable
+#define DIODE_VALUE_25C		440 // ADC value for diode at 0C
+#define DIODE_SENSITIVITY	-1.66 // ADC value / degree C, tuneable
 
 #define LM35_SENSITIVITY    0.01 // V / degree C, see LM35 datasheet
 
-#endif
\ No newline at end of file
+#endif