int analogInput = 0; int f=2; int e=3; int d=4; int c=5; int b=6; int a=7; int s=13; float vout = 0.0; float vin = 0.0; float R1 = 100000; float R2 = 10000; int value = 0; void setup() { Serial.begin(9600); pinMode(analogInput,INPUT); pinMode(s,OUTPUT); pinMode(a,OUTPUT); pinMode(b,OUTPUT); pinMode(c,OUTPUT); pinMode(d,OUTPUT); pinMode(e,OUTPUT); pinMode(f,OUTPUT); digitalWrite(s,LOW); digitalWrite(a,HIGH); delay(500); digitalWrite(b,HIGH); delay(500); digitalWrite(c,HIGH); delay(500); digitalWrite(d,HIGH); delay(500); digitalWrite(e,HIGH); delay(500); digitalWrite(f,HIGH); delay(500); digitalWrite(a,LOW); digitalWrite(b,LOW); digitalWrite(c,LOW); digitalWrite(d,LOW); digitalWrite(e,LOW); digitalWrite(f,LOW); } void loop() { value = analogRead(analogInput); vout = (value * 5.0) / 1024; vin = vout / (R2/(R1+R2)); Serial.println("Input Voltage = "); Serial.println(vin); if(vin>12.46) {digitalWrite(a,HIGH);} else { digitalWrite(a,LOW);} if(vin<=12.46 && vin>12.28) {digitalWrite(b,HIGH);} else { digitalWrite(b,LOW);} if(vin<=12.28 && vin>12.12) {digitalWrite(c,HIGH);} else { digitalWrite(c,LOW);} if(vin<=12.12 && vin>11.98) {digitalWrite(d,HIGH);} else { digitalWrite(d,LOW);} if(vin<=11.98 && vin>11.90){digitalWrite(e,HIGH);} else {digitalWrite(e,LOW);} if(vin<=11.90) {digitalWrite(f,HIGH);} else {digitalWrite(f,LOW);} delay(2000); }