Chimes of various types are available for you to use. A four-note chime unit may sound single notes for the back door and as many as eight notes for the front door. The wiring diagram in Fig. 8 shows how to wire a dual-chime unit for one note to sound from the back door and two notes to chime from the front door. You'll notice the similarity between wiring a chime and a doorbell or buzzer.
Chimes are usually much more attractive than bells or buzzers.
For this reason, you may want to mount them right on the wall in a room. Again, remember that the chime should be mounted in a location that allows you to hear the chimes throughout your home. Read the manufacturer's instructions and follow them carefully. Many larger transformers require specific wiring arrangements. 9 shows a simple wiring plan for a four-note chime.