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Door bell

This is how I was thinking about setting up the first floor doorbell just by tying it in. If I push the front door switch it sends the 16v to both doorbells. If I push the side door switch it also sends the 16v to both doorbells.

Also would sending the 16v directly to the doorbell and using the switches as the return to the transformer work as well just flip flop the + and - as I now have them? or was that what you were trying to tell me to begin with?

using multi-voltage transformer