This is my first post, but I'm a little desperate for help as I'm working toward a deadline, but I've been working on a device that, using Google's voice stuff, toggles a relay that controls mains power to the light fixture in the room. Basically, everything but the relay is worked out. See, I, of course, realize that 3v3 does not toggle a 5v relay, so I feel like I have a few options, but I wanted to run it by someone before I go ahead. Firstly, and this seems really silly but would function, is a low voltage relay that will, when toggled by the 3v, deliver 5 volts to my mains relay.
Or a more simple solution, but one that my little knowledge of ICs and transistors can't seem to figure out, is to use some widely available IC/transistor to supply the 5v to the relay when toggled. Any ideas?
Please let me know!