volatile long value;
int vol;
float U;
volatile int dwq;

void stop(){
  for(int x=0; x<=100; x++){
    digitalWrite(10, HIGH);
    digitalWrite(7, LOW);
    digitalWrite(8, LOW);
    digitalWrite(9, LOW);
    delayMicroseconds(10000);
  }
  digitalWrite(10,LOW);
}


void setup(){
  value = 'a';
  pinMode(13, OUTPUT);
  digitalWrite(13,HIGH);

   pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(3, INPUT);
  pinMode(2, OUTPUT);
  Serial.begin(115200);
  pinMode(A0, INPUT);
  pinMode(0, OUTPUT);
  dwq = 0;
}

void loop(){
  if (Serial.available() > 0) {
    value = Serial.read();
    if (value == 'a') {
      digitalWrite(13,HIGH);

    }
    if (value == 'b') {
      digitalWrite(13,LOW);

    }
    if (value == 'c') {
      digitalWrite(13,HIGH);
      delay(500);
      digitalWrite(13,LOW);
      delay(500);

    }
  if (value == 'd') {
    digitalWrite(9,HIGH);
  delay(300);
  digitalWrite(9,LOW);
  digitalWrite(8,HIGH);
  delay(300);
  digitalWrite(8,LOW);
  digitalWrite(7,HIGH);
  delay(300);
  digitalWrite(7,LOW);
  digitalWrite(6,HIGH);
  delay(300);
  digitalWrite(6,LOW);
  digitalWrite(5,HIGH);
  delay(300);
  digitalWrite(5,LOW);
  digitalWrite(4,HIGH);
  delay(300);
  digitalWrite(4,LOW);}

  }

  if (value == 'e') {
    do{attachInterrupt(1,stop,RISING);

 digitalWrite(7, HIGH);
 delay(500);
 digitalWrite(7, LOW);
 delay(100);

digitalWrite(8, HIGH);
 delay(500);
 digitalWrite(8, LOW);
 delay(100);

 digitalWrite(9, HIGH);
 delay(500);
 digitalWrite(9, LOW);
 delay(100);}while(true);
  }
  if (value == 'f') {
  do{Serial.print("vol=");
  vol=analogRead(A0);
  Serial.println(vol);
  Serial.print("U=");
  U=float(vol*5/1024.00);
  Serial.print(U);
  Serial.print("V");
  delay(1000);}while(true);
  
  }
if (value == 'g'){
 do{dwq = analogRead(A0);
  if (dwq < 341) {
    analogWrite(0, 0);

  }
  if (dwq >= 341 && dwq <= 682) {
    analogWrite(0, 127);

  }
  if (dwq > 682) {
    analogWrite(0, 255);

  }}while(true);
}
}