Arduino Potentiometer Controled Fan w/ MOSFET

//
//
//
//          Arduino Potentiometer Controled Fan w/ MOSFET
//          by learnelectronics
//          4/2/2019
//          www.youtube.com/c/learnelectronics
//          email:[email protected]
//
//
//








#include <Wire.h>                                   //I2C LIBRARY FOR OLED
#include <Adafruit_GFX.h>                           //ADAFRUIT GRAPHICS LIBRARY
#include <Adafruit_SSD1306.h>                       //ADAFRUIT OLED DRIVER LIBRARY

int potRead = 0;                                    //INITIALIZE VARIABLE FOR POTENTIOMETER
int pwmOut = 0;                                     //INITIALIZE VARIABLE FOR PWM CONTROL OF FAN

#define OLED_RESET 4                                //REQUIRED BY SSD1306 LIBRARY

Adafruit_SSD1306 display(OLED_RESET);               //DEFINE THE OLED AS display

void setup()   {
  Serial.begin(9600);                               //SERIAL COMMS FOR DEBUGGING
  pinMode(A0,INPUT);                                //DEFINE A0 AS AN INPUT
  pinMode(3,OUTPUT);                                //DEFINE D3 AS AN OUTPUT
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);        //START UP THE OLED
  display.display();                                //SHOW BUFFER
  display.clearDisplay();                           //CLEAR BUFFER





}


void loop() {

  potRead = analogRead(A0);                         //READ THE POTENTIOMETER @ A0
  pwmOut = map(potRead, 0, 1023, 125, 255);         //CONVERT THE 0-1023 VAULE OF THE POT TO THE 0-255 VALUE PWM USES

  display.setTextSize(1);                           //SETUP OLED WITH TEXT SIZE OF 1
  display.setTextColor(WHITE);                      //SETUP OLED WITH COLOR WHITE
  display.setCursor(0,0);                           //SETUP OLED WITH CURSOR IN UPPER LEFT
  display.print("Analog Val: ");                    //PRINT HEADING TO OLED BUFFER
  display.println(potRead);                         //PRINT POT VALUE (A0) TO OLED BUFFER AND NEWLINE
  display.print("PWM Val: ");                       //PRINT HEADING TO OLED BUFFER
  display.println(pwmOut);                          //PRINT PWM VALUE (D3) TO OLED BUFFER AND NEWLINE
  display.display();                                //SHOW WHATS IN THE OLED BUFFER
  delay(100);                                       //WAIT 100mS
  display.clearDisplay();                           //CLEAR THE DISPLAY
  analogWrite(3,pwmOut);                            //OUTPUT A PWM VALUE TO PIN D3 TO CONTROL THE FAN SPEED


}