// https://forum.arduino.cc/t/arduino-uno-timer-2-fast-pwm-bug/1118321
// https://docs.arduino.cc/tutorials/generic/secrets-of-arduino-pwm

void setup() {
  DDRD |= (1<<PD3);    // Output Pin 3 (Arduino DIO 3) for PD3 PWM Timer OC2B output
  TCCR2A = (1<<COM2B1) | (1<<COM2B0) | (1<<WGM21) | (1<<WGM20);	// Inverting Fast PWM mode 3 using OCR B unit
	TCCR2B = (1<<CS20);	// No-Prescalar
  OCR2B = 0xFF - 20;
}

void loop() {

}