code: func NewBuzzerDriver(a DigitalWriter, pin string) *BuzzerDriver {
  	l := &BuzzerDriver{
  		name:       gobot.DefaultName("Buzzer"),
  		pin:        pin,
  		connection: a,
  		high:       false,
  		BPM:        96.0,
  	}
  
  	return l
  }
docs: // NewBuzzerDriver return a new BuzzerDriver given a DigitalWriter and pin.