Hello, 2 questions:
So I'm trying to build a smart thermostat for my home using an ESP-12E board. I have most things laid down, but I'm not sure what relay to use. I need a bistable relay, as this thermostat needs to be powered from 3xAA batteries for at least a few months, so it has to only draw current when switching. I looked at the RSM850B, but I don't really understand the datasheet. Will this relay work with the 3.3v microcontroller? How much current will it draw when switching? And how do I actually use it? If it's not good for my purpose, could you give me a suggestion? I live in Romania, so it has to available from a website like tme.eu, or another which ships here.
Also, I need a regulator to convert the voltage from the batteries to around 3.3v. Is the MIC5209-3.3YS a good choice? It's an LDO, it has a low queiscent current, and I think the 500 mA it provides will be enough for my application, but I'm still a bit paranoid.
Any help will be appreciated. Thanks.