/*This software is provided in an “AS IS” condition,NO WARRANTIES in any form apply to this software.
 picmicrolab.com 10.12.2017
***************************************************************************************************************
Arduino PWM Fan Controller

*/

int FanPWM = 9;             // Fan PWM pin 
int PushButtonInput1 = 2;   // Push button - set PWM Fan speed LOW
int PushButtonInput2 = 3;   // Push button - set PWM Fan speed Medium
int PushButtonInput3 = 4;   // Push button - set PWM Fan speed High


void setup() 
{
  
  pinMode(FanPWM, OUTPUT);
  pinMode(PushButtonInput1,INPUT_PULLUP);
  pinMode(PushButtonInput2,INPUT_PULLUP);
  pinMode(PushButtonInput3,INPUT_PULLUP);
}


void loop()
{
 //-----------------LOW----------------------
 if(digitalRead(PushButtonInput1) == LOW)
 analogWrite(FanPWM, 1);
 //----------------Medium---------------------
 if(digitalRead(PushButtonInput2) == LOW)
 analogWrite(FanPWM, 127);
 //------------------High-----------------------
 if(digitalRead(PushButtonInput3) == LOW)
 analogWrite(FanPWM, 255);
 //---------------------------------------------
}