Built the circuit I talked about yesterday. I still need to insulate the various connections and install the whole thing in a box, but it’s all wired up and ready to test. Might test it later on tonight, or it might have to wait until tomorrow. Life is busy.
Update: Two things. First, it works. Second, Ray Allen makes a product called the REL-2, which is the exact same thing. Oh well, it was more fun to build it than to buy it.