Mini Project

#include <Servo.h>

Servo myservo;

int piezo_pin = 10;

const int dial=A0;
int writeVal;
int pos;
int piezo_output;

const int led1=2;
const int led2=3;
const int led3=4;
const int led4=5;
const int led5=6;


void setup() {
  // put your setup code here, to run once:

pinMode(led1,OUTPUT);
pinMode(led2,OUTPUT);
pinMode(led3,OUTPUT);
pinMode(led4,OUTPUT);
pinMode(led5,OUTPUT);

pinMode(piezo_pin,OUTPUT);

myservo.attach(9);

pinMode(dial,INPUT);

Serial.begin(9600);

  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH);
  delay(500);
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  digitalWrite(led5, LOW);

}

void loop() {
  // put your main code here, to run repeatedly:



writeVal = analogRead(dial);
writeVal = map(writeVal, 0, 1023,0,100);
writeVal = constrain(writeVal, 0,100);
Serial.println(writeVal);

pos = writeVal*180/100;

myservo.write(pos);

piezo_output = map(writeVal, 0, 100, 31, 4978);

tone(piezo_pin, piezo_output);
delay(50);
noTone(piezo_pin);

if (writeVal < 10)
{
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  digitalWrite(led5, LOW);
}
if (writeVal > 10)
{
  digitalWrite(led1, HIGH);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  digitalWrite(led5, LOW);
}
 if (writeVal > 40)
{
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  digitalWrite(led5, LOW);
}
 if (writeVal > 60)
{
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, LOW);
  digitalWrite(led5, LOW);
}
 if (writeVal > 80)
{
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, LOW);
}
 if (writeVal == 100)
{
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH);

}
}