I always forget this - and then I am looking for the references. Usually I can’t find them and then I am annoyed and upset and the new idea vanished away due to searching of reference materials. So I am tired of this one, here is the Huzzah pin/breakout layout to LUA.
The analog pin A handles up to 1.0 V and has 1024 values to read.The ESP8266 Huzzah can draw up to 250 mA and peak up to 500 mA. The onboard regulator can take any voltage from 3.4V to 16V.
Ok, this should be a reference for me in the future with a consistent bookmark. :)