I am wanting to build a small 110vac temp controller for sous vide cooking. Found a bunch of PID controllers for around 20-bucks and lots of how-to-build instructions.
RNR, SNR and SSR?
I am guessing SSR is Solid Sate Relay, but what are SNR and RNR?
Search as I might I cannot find an explanation for those two. I see a zillion ads offering either type but have no idea which one I want.