In my previous post, I was showing a PCB which would fit in a dual outlet box, and while I probably would have worked fine, I started looking for something a bit better looking. What I ended up with was a set of these.
They are a part of a cheap set of 3 remote switches, and a remote to control them. Normally they operate on a 433 MHz system, but the only thing I actually want from them, is their body…
Inside we find what we would expect, a PCB, with a relay on. What I was most interested in checking out at this stage, was if they were switching both terminals, or just one. As you can see on the right terminal, a wire go from below on the incoming terminal, up to the PCB, through the relay, and back out to the outgoing terminal, so they only switch one.
Taking it a bit more apart reveals two turn buttons, which can be reached from the outside, and adjusted with a screwdriver. I think I am going to use these as the way to get them in and out of programming mode, where they will start up as a access point, and host a little web server where all info about wifi and the MQTT server can be put in.
Not much we need on the back of the PCB either. I am going to measure out where the holes should be in the PCB, so it will fit into the pins in the house, and also where the pads for the dials on the back should be.