Pickup Winder Code

// include the library code:
#include <LiquidCrystal.h>

//Varibles used for calculations
volatile int NbTopsFan;
int Calc;
unsigned int Count;

//The pin location of the sensor
int hallsensor = 2; typedef struct{

//Defines the structure for multiple fans and
//their dividers
char fantype;
unsigned int fandiv; }fanspec;

//Definitions of the fans
//This is the varible used to select the fan and its divider,
//set 1 for unipole hall effect sensor
//and 2 for bipole hall effect sensor
fanspec fanspace[3]={{0,1},{1,2},{2,8}}; char fan = 2;

void rpm ()
//This is the function that the interupt calls
{ NbTopsFan++; Count++;}

//This is the setup function where the serial port is initialised,
//and the interrupt is attached
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
void setup() {
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  pinMode(hallsensor, INPUT);
  Serial.begin(9600);
  attachInterrupt(0, rpm, RISING);
}

void loop() {
//Set NbTops to 0 ready for calculations
{
//Enables interrupts
sei();

lcd.setCursor(0,0);
lcd.print(Count/4);
lcd.print(" turns");
delay(1000);

}
}