void setup() {
 Serial.begin(9600);
 ADCSRA |= 1<<ADEN;
 ADCSRA |= 1<<ADPS0;
 ADCSRA |= 1<<ADPS1;
 ADCSRA |= 1<<ADPS2;
 ADMUX |= 1<<ADLAR;
 ADCSRA |= 1<<ADIE;
 SREG|= 1<<7;
 ADCSRA |= 1<<ADATE;

}
int vysledok;

void loop() {
  Serial.println(vysledok);
  

}
 ISR(ADC_vect)
 {
  vysledok = ADCH;
 }