What subsystems are found in a doorbell?

A typical doorbell system includes several key subsystems: the push button, which is activated when someone presses it; the chime or bell unit, which produces sound; and the transformer, which converts household voltage to a lower voltage suitable for the doorbell circuit. Additionally, some systems may incorporate a wireless receiver, allowing for remote operation without wiring. These components work together to provide a functional and user-friendly doorbell experience.