I have a strange chime doorbell that has wires to the following labeled screws being utilized:
- common
- transformer
- front
Attached to common and transformer is the transformer (16vac 30va). Then the wires headed to the doorbell are attached to common and front (1 and 3). Using a multimeter we find 16-18v between 1 and 2, and 16-18v between 1 and 3.
If I connect the video doorbell directly to 1 and 3 - the doorbell orange light blinks but the doorbell also buzzes intermittently. Also, my doorbell chimes just constantly.
Do we think I just am lucky and have an unsupported doorbell? Is this a user case for the “mechanical” setting within the application? I can’t find any wires touching between contacts to potentially explain the buzzing.
Here’s a photo of my indoor unit for details:
