The first thing you’ll want to do is order and print all of the necessary components. The printed components are all available on Github here.

Since I was using this as a self-made Eagle tutorial, I printed up a board. As I mentioned in the details, I had 10 printed so message me if you’re interested in me getting one to you. Otherwise, you can pretty easily make your own board using a protoboard.

With the board finished and the enclosure printed, assemble everything.

I’m going to assume that you’ve already identified the connections/wires from your doorbells. Simply make the appropriate connections on the board (They’re labeled on the enclosure). Keep in mind that since it’s AC voltage, the ‘positive’ and ‘negative’ wires can be connected either way for a given pair.

The code is located on Github here. It’s written for a Particle Xenon (or Argon/Boron). If you’re using a non-Particle device, the code will need to be modified slightly. You might also need to re-calibrate the Max values for your specific board and setup.