How to create a 38 Khz pulse with arduino using timer or PWM?

[Cyriaque]

This code generates 38 KHz on pin D10 on the Mega2560:

const byte LED = 10;  // Timer 2 "A" output: OC2A

void setup() {
  pinMode (LED, OUTPUT);
  
  // set up Timer 2
  TCCR2A = _BV (COM2A0) | _BV(WGM21);  // CTC, toggle OC2A on Compare Match
  TCCR2B = _BV (CS20);   // No prescaler
  OCR2A =  209;          // compare A register value (210 * clock speed)
                         //  = 13.125 nS , so frequency is 1 / (2 * 13.125) = 38095

}  // end of setup

void loop() { }

It does not use interrupts and does not interfere with any other pin.

Thank you very much for this nice code. On the Arduino Mini V5, the pin for OC2A seems to be 11, not 10.