When my perfboard-based circuit is complete, it needs to be protected. For this project, which is a thermostat in an outdoor shed, it needs a slightly weather-proof box or container. The container could be a glass jar with the circuit glued to its side and a hole drilled in its lid. It could be a metal box you buy mints in, wrapped shut with electrician's tape, with the circuit raised up off the metal on polystyrene cubes. Or it could be some humidity-proof plastic container sold openly -- only I can't see it -- in every electronics parts shop.
In what could I safely house a circuit, away from ESD and moisture?
And what is such a container called, so I can find it in future?
And does the negative terminal of the power source act as a ground, for such a container?.