US Patent 9179108 Doorbell chime systems and methods

Doorbell systems can be configured to electrically couple to a doorbell power supply of a building. In some embodiments, the doorbell systems can include a doorbell with a button configurable to sound a chime. As well, doorbell systems can include a first wire that can electrically couple the doorbell to the power supply and a second wire that can electrically couple the doorbell to the chime. Doorbell systems can also include a third wire that can electrically couple the chime to the power supply to form a circuit comprising the first wire, the doorbell, the second wire, the chime, the third wire, and the power supply.