diff --git a/prosjekt.X/fan_speeeed.c b/prosjekt.X/fan_speeeed.c
index 5cb448f..b20d219 100644
--- a/prosjekt.X/fan_speeeed.c
+++ b/prosjekt.X/fan_speeeed.c
@@ -1,3 +1,5 @@
+#include <avr/ioavr128db48.h>
+
 #include "fan_speeeed.h"
 #include "uart.h"
 
@@ -42,6 +44,36 @@ void PORTB_init() {
     PORTA.OUTSET |= PIN5_bm;
     PORTA.DIRSET |= PIN5_bm;
 }
+// Voltage reference
+#define VDACREF 
+#define VREF 
+#define DACREF_VALUE (VDACREF * 256 / VREF)
+
+
+void init_ac(){
+    // CONFIGURE PINS AS ANALOG INPUTS
+    PORTD.PIN2CTRL = PORT_ISC_INPUT_DISABLE_gc;
+    
+    // SET BENCH MARK
+    
+    
+    //SELECT POSITIVER INPUTS muxs
+    AC0.MUXCTRLA = AC_MUXPOS_AINP0_gc | AC_MUXNEG_DACREF_gc;
+    
+    // OPTIONAL: ENABLE INNPUT PIN BY WRITING "1" TO OUTEN
+    AC0.CTRLA = 0x40; // 0b01000000
+    
+    // ENABLE AC BY WRITING 1 TO ENABLE BIT IN ACN.CTRLA
+    AC0.CTRLA |= PIN0_bm; // 0b00000001
+    AC0.CTRLA = AC_ENABLE_bm | AC_INTMODE_NORMAL_POSEDGE_gc | AC_OUTEN_bm;
+    
+    // SET CMP TO 1
+    AC0.INTCTRL = 0x01; 
+}
+
+ISR(AC0_AC_vect){ // AC0 vec flag 
+    AC0.STATUS |= 0x10; //CMP flag to 0. 
+}
 
 //-----------------------------------------------------------------------------------------------------
 //-------------------------------------- S E T U P-----------------------------------------------------
diff --git a/prosjekt.X/main.c b/prosjekt.X/main.c
index 4a7415e..185972b 100644
--- a/prosjekt.X/main.c
+++ b/prosjekt.X/main.c
@@ -38,6 +38,8 @@ int main(void) {
     
     sei();
 
+    PIN2_bm
+    
     /* Replace with your application code */
     while (1) {
     }