I'm building a thermostat, and the idea is to have it fire one of two
120V 10A circuits (one to heat, one to cool). I have two of these modules for the relay and I understand how to connect both of them.
Here is a picture directly from the site I purchased it from:
However, I still have a couple of questions:
- Is it safe to connect from an Arduino pin directly to the signal pin on this block or is there some way I should be 'protecting' the Arduino?
- I eventually want to put this whole project in a single box and hopefully only have one power cord going to it. What's the safest way to power both the Arduino and the 120V 10A circuits (note that only one of the
120V 10Acircuits would ever be on at a given time;never simultaneously)?