   pinMode(PIN_LED1, OUTPUT);
 
   pinMode(COIN_COUNTER, INPUT);
-  attachInterrupt(COIN_COUNTER, intHandle, LOW);
+  //attachInterrupt(PIN_INT1, intHandle, CHANGE);
+  attachInterrupt(0, intHandle, FALLING); //interruptNum is num of interrupt, not pin
 }
 
 void delay_counter(uint32_t ms)

    pennies_last = pennies_current;
  }

  delay_counter(1000);


  //delay(1000);

  if ( time_remaining > 0)
  {
    uint32_t cents = pennies_current % 100;
    uint32_t dollars = pennies_current / 100;
    Serial.print("$");
    Serial.print(dollars, DEC);
    Serial.print(".");
    if ( cents <= 9 ) Serial.print("0");

#include <LiquidCrystal_I2C.h>


#define COIN_COUNTER 4 //PIN_INT0

LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);  // Set the LCD I2C address

