There is a wire going into the doorbell button that shows voltage. and Buzzer raspberry pi circuit connect connecting projects Buzzer arduino piezo fritzing
Buzzer arduino nano interfacing Door wire doorbell bell chimes diagram two button voltage wiring transformer chime shows bells second going do rings case using Connecting a buzzer to the raspberry pi
.
.
A Guide: Interfacing Buzzer with Arduino Nano | ElectroRules
There is a wire going into the doorbell button that shows voltage. And
Connecting a buzzer to the Raspberry Pi - Connecting a buzzer to the