PWM High-Frequency Generation

January 22, 2026

Solving Approach:

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Code

/*Paste your code here*/
#define potpin A0
void setup() {
  pinMode(9, OUTPUT);
  
  // Set Fast PWM on Timer1, change prescaler
  TCCR1A = _BV(COM1A1) | _BV(WGM11); // non-inverting mode, Fast PWM
  TCCR1B = _BV(WGM12) | _BV(CS11);  // prescaler = 8, PWM freq = 7.8kHz


}

void loop(){
  int potval = analogRead(potpin);
  int led = map(potval, 0, 1023, 0, 255);
  OCR1A = led; // Duty cycle
  delay(10);
}

Output

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