PROGRAM TO GENERATE 30.303KHZ IN ARDUINO

const byte OUTPUT_PIN = 3;  // Timer 2 "B" output: OC2B

const byte n = 65;  // for example, 8.89 kHz

void setup()
 {
  pinMode (OUTPUT_PIN, OUTPUT);

  TCCR2A = bit (WGM20) | bit (WGM21) | bit (COM2B1); // fast PWM, clear OC2A on compare
  TCCR2B = bit (WGM22) | bit (CS21);         // fast PWM, prescaler of 8
  OCR2A =  n;                                // from table 
  OCR2B = ((n + 1) / 2) - 1;                 // 50% duty cycle
  }  // end of setup

void loop() { }

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