Doorbell Wiring Diagram One Button

How does a doorbell work? Doorbell chimes transformer chime pictorial lighted friedland nutone system wires wonder sound Door wire doorbell bell chimes diagram button two voltage wiring transformer chime shows bells second going do rings case using

There is a wire going into the doorbell button that shows voltage. And

There is a wire going into the doorbell button that shows voltage. and

There is a wire going into the doorbell button that shows voltage. And

How Does a Doorbell Work? | Wonderopolis