Coin Identifier by Craynerd

//Coin Identifier by craynerd
//Reference: https://www.youtube.com/watch?v=f4GhBp9PUfY

volatile byte CoinPulseCount = 0;
byte NewCoinInserted;
byte Command = 0;
int OpticalCountPin = 3;
volatile unsigned long PulseTime;

String OnePulse = "5p";
String TwoPulses = "10p";
String ThreePulses = "20p";
String FourPulses = "50p";
String FivePulses = "£1";
String SixPulses = "£2";

void setup(){
	Serial.begin(9600);
	Serial.println("Waiting...");
	Serial.println();
	pinMode(OpticalCountPin, INPUT);
	attachInterrupt(1, CoinPulse, RISING);
}

void loop(){
	if(CoinPulseCount > 0 && millis() - PulseTime > 200){
		NewCoinInserted = CoinPulseCount;
		CoinPulseCount = 0;
	}
        switch(NewCoinInserted){
	        case 1:
		        Serial.println(OnePulse + " inserted");
		        NewCoinInserted = 0;
		        break;
	        case 2:
		        Serial.println(TwoPulses + " inserted");
		        NewCoinInserted = 0;
		        break;
	        case 3:
	        	Serial.println(ThreePulses + " inserted");
	        	NewCoinInserted = 0;
	        	break;
	        case 4:
		        Serial.println(FourPulses + " inserted");
		        NewCoinInserted = 0;
		        break;
	        case 5:
	        	Serial.println(FivePulses + " inserted");
	        	NewCoinInserted = 0;
	        	break;
	        case 6:
	        	Serial.println(SixPulses + " inserted");
	        	NewCoinInserted = 0;
	        	break;
        }
}

void CoinPulse(){
	CoinPulseCount ++;
	PulseTime = millis();
}