I am trying to upgrade our existing bell with my arduino to detect whether the bell is used and to mute the bell.
The circuit for the bell runs with 9V AC. In order to minimize the wiring I want to serially connect something to the bell such that it is possible with my arduino to turn the bell on and off and I can detect whether the bell was used.
I tried to use two relays: one as a switch which can be used by the arduino and one as a switch which will be closed when the bell is used. They were parallel connected. But since I am a beginner nothing worked as intended :)
Is it possible to do this with two relays? Or is there a better way to make it work?
Thanks for the answer. The bell isn't earthed. I tried this:
What is wrong with it? :)