Relay Holder / Wall Plate

thingiverse

I'm using these Arduino control projects and a bunch of single relay boards that are optical isolated from China for basically free. I needed a case that would be easily servicable and fit into a 2x4 electrical box. The relay board is a press-in fit, but leaves full access to the electrical connections. I added holes on the plate front, just as-is, because I couldn't figure out how to make them for counter-sunk screws yet. I attached a picture of the relay board so you can source it yourself, since there's no part number on the board itself. It measures 2 3/16 inches long by 11/16 inch wide by 3/4 inch tall (+/- 1/16").