Arduino Sketh..Buck Boots

/* * This is an example code for a BOOST converter circuit made with arduino + feedback * I've used arduino NANO. We have to set the timer of the PWM on pin D3 * The feedback is connected to A1 and we set the desired voltage with a * potnetiometer connected to A0. * * Subscribe: http://www.youtube.com/c/electronoobs * webpage: http://www.electronoobs.com/eng_circuitos_tut10.php */int potentiometer = A0; //The input from the potentiometer is A0int feedback = A1; //The feedback input is A1int PWM = 3; //Digital pin D3 por PWM signalint pwm = 0; //Initial value of PWM widthvoid setup() { pinMode(potentiometer, INPUT); pinMode(feedback, INPUT); pinMode(PWM, OUTPUT); TCCR2B = TCCR2B & B11111000 | B00000001; // pin 3 and 11 PWM frequency of 31372.55 Hz }void loop() { float voltage = analogRead(potentiometer); //We read the value of the potentiometer, which is the desired valuefloat output = analogRead(feedback); //We read the feedback, which is the real value//If the desired value is HIGHER than the real value, we increase PWM widthif (voltage > output) { pwm = pwm+1; pwm = constrain(pwm, 1, 254); }//If the desired value is LOWER than the real value, we decreaase PWM widthif (voltage < output) { pwm = pwm-1; pwm = constrain(pwm, 1, 254); }analogWrite(PWM,pwm); //Finally, we create the PWM signal }