Solenoid Test Arduino Sketch - really just a bit banged low frequency generator

gistfile1.txt

int pin = 13;
int duty = 10; //duty cycle in percent - more is .. VERY power hungry, 
int start_freq = 1; //in hz if you don't want to sweep but want constant, set equal to end_freq
int end_freq = 10;// in hz
int num_taps = 5;
int wait = 0; //delay in MS between sweeps

void setup(){
  pinMode(pin, OUTPUT); 
  Serial.begin(9600);
}

void loop(){
  int i = start_freq;
  for(i; i<end_freq; i++)//range of hz to sweep through, resolution 1hz
  {
    for(int j=0; j<num_taps; j++)//how many times to initiate each hz
    {
        frequency(i);
    }
  }
  delay(wait);
}

void frequency(int i){
  
  //total frequency is i
  //duty cycle is x% of i
  int on=(10*duty)/i;
  int freq=1000/i;
  int off=freq-on;

  digitalWrite(pin,HIGH);
  delay(on);
  Serial.print("On: ");
  Serial.println(on);
  digitalWrite(pin,LOW);
  delay(off);
  Serial.print("Off: ");
  Serial.println(off);

}