HIGH VOLTAGE BUCK CONVERTER

PROGRAM void setup() { setPwmFrequency(11, 1); analogWrite(11,150); } void loop() { } void setPwmFrequency(int pin, int divisor) {   byte mode;   if(pin == 5 || pin == 6 || pin == 9 || pin == 10) {     switch(divisor) {       case 1: mode = 0x01; break;       case 8: mode = 0x02; break;       case 64: mode = 0x03; break;       case 256: mode = 0x04; break;       case 1024: mode = 0x05; break;       default: return;     }     if(pin == 5 || pin == 6) {       TCCR0B = TCCR0B & 0b11111000 | mode;     } else {       TCCR1B = TCCR1B & 0b11111000 | mode;     }   } else if(pin == 3 || pin == 11) {     switch(divisor) {       case 1: mode = 0x01; break;       case 8: mode = 0x02; break;       case 32: mode = 0x03; break;       case 64: mode = 0x04; break;       case 128: mode = 0x05; break;       case 256: mode = 0x06; break;       case 1024: mode = 0x7; break;       default: return;     }     TCCR2B = TCCR2B & 0b11111000 | mode;   } } /**  * Divides a given PWM pin frequency by a divisor.  *  * The resulting frequency is equal to the base frequency divided by  * the given divisor:  *   – Base frequencies:  *      o The base frequency for pins 3, 9, 10, and 11 is 31250 Hz.  *      o The base frequency for pins 5 and 6 is 62500 Hz.  *   – Divisors:  *      o The divisors available on pins 5, 6, 9 and 10 are: 1, 8, 64,  *        256, and 1024.  *      o The divisors available on pins 3 and 11 are: 1, 8, 32, 64,  *        128, 256, and 1024.  *  * PWM frequencies are tied together in pairs of pins. If one in a  * pair is changed, the other is also changed to match:  *   – Pins 5 and 6 are paired on timer0  *   – Pins 9 and 10 are paired on timer1  *   – Pins 3 and 11 are paired on timer2  *  * Note that this function will have side effects on anything else  * that uses timers:  *   – Changes on pins 3, 5, 6, or 11 may cause the delay() and  *     millis() functions to stop working. Other timing-related  *     functions may also be affected.  *   – Changes on pins 9 or 10 will cause the Servo library to function  *     incorrectly.  *  * Thanks to macegr of the Arduino forums for his documentation of the  * PWM frequency divisors. His post can be viewed at:  *   http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1235060559/0#4  *  */