using interrupts

Projects Programming
8

OP's code properly displayed using the code button </> and indented for easier reading - and erroneous semi-colons removed

volatile int coins = 0; //counter pin from coin acceptor
int solenoidPin = 12; // output to solenoid1 pin for 1st solenoid
int solenoid2Pin = 13;

void setup()
{
    Serial.begin(9600); 
    pinMode (2,INPUT_PULLUP); //2 is counter pin from coin acceptor
    attachInterrupt(0, coinInserted, CHANGE); //coin counterr
    pinMode(solenoidPin, OUTPUT); //sets 12th pin as output
    pinMode(solenoidPin, OUTPUT);//11th output for sol2
}

void coinInserted()
{
    coins=coins+1;
}

void loop()
{
    Serial.print(coins)

    if( coins == 2)
    {
        digitalWrite(solenoidPin, HIGH);
        delay(1000);
        digitalWrite(solenoidPin, LOW);
        delay(1000);
        coins = 0;
    }
    else if(coins == 5)
    {
        digitalWrite(solenoid2Pin, HIGH);
        delay(1000);
        digitalWrite(solenoid2Pin, LOW);
        delay(1000);
    }
}

...R