PWM Stuff

//Blank PWM @ 50% on
void setup() {
pinMode(9,OUTPUT);

}

void loop() {
 analogWrite(9,127);

}

//-------------------------------------------------------------------------
//PWM Controlled by pot
int x=0;
int y=0;


void setup() {
pinMode(9,OUTPUT);
pinMode(A0,INPUT);

}

void loop() {
x=(analogRead(A0));
y=(map(x,0,1023,0,255));

 analogWrite(9,y);

}

//--------------------------------------------------------------

//PWM with frequency control

/*
 * Control Freq of PWM using PWM Library
 * my code: https://pastebin.com/eLWitAki
 * library: http://code.google.com/p/arduino-pwm-frequency-library/downloads/list
 */
#include <PWM.h>


int led = 9;
int32_t frequency = 1000;

void setup()
{

  InitTimersSafe();


  bool success = SetPinFrequencySafe(led, frequency);


  if(success) {
    pinMode(13, OUTPUT);
    digitalWrite(13, HIGH);
  }
}

void loop()
{

  pwmWrite(led, 127);

}