AUTOMATIC VOLTAGE STABILIZER USING MSP430

In this project i have converted old manual type voltage stabilizer into automatic using msp430g2553 ,uln,relays..etc.

CIRCUIT

PROGRAM

//210-235-265 --SELECTED TAPS WHEN INPUT IS AT 210V AC
//210--0.68V -210 --- ON HOLD
//210--0.73V ON RELEASE
//210-235-265
//210--0.68V -210 --- ON HOLD
//210--0.73V ON RELEASE
#define lowertap P2_3
#define middletap P1_3
#define uppertap P1_4
int f=1,a;
void setup()
{
    Serial.begin(9600);
    initoutputpins ();
    offallrelay();
    digitalWrite(lowertap,HIGH);delay(2000);  
    f=1;  
}
void loop()
{
    a=analogRead(A0);   delay(10);    //Serial.println(a); delay(100); 
    if(a>=211 &&   a<250 && (f==2 || f==3) ) {   offallrelay();delay(2000);    digitalWrite(lowertap,HIGH); delay(2000);   f=1;   }
    else if(a>185 && a<=210 &&(f==1 || f==3)   ) { offallrelay();delay(2000);   digitalWrite(middletap,HIGH); delay(2000); f=2;
            while( a<220 && a>186   ){a=analogRead(A0);   delay(10);}
    }
    else if (a<=186 &&( f==1 || f==2) ) { offallrelay(); delay(2000);   digitalWrite(uppertap,HIGH); f=3; delay(2000); 
                while( a<193 ){a=analogRead(A0);   delay(10);}
    }
}
void initoutputpins (void)
{
    pinMode(lowertap,OUTPUT); pinMode(middletap,OUTPUT); pinMode(uppertap,OUTPUT);
}
void offallrelay(void)
{
    digitalWrite(lowertap,LOW);digitalWrite(middletap,LOW);digitalWrite(uppertap,LOW);  
}

PCB LAYOUT