What are the features of assembling a frost-resistant robot?

Question

Do it yourself

I am doing a robot patrol for the site. The meaning will be lost if it freezes at -35 and a living guard will have to walk. The budget is modest, and it is already bursting
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Answer 1

Several rules for the design of electro-mechanical devices for frost and the street.
Your main enemy is electrolytes and condensate.
1. Electronics. Look for powerful elements. Perhaps they can heat all the electronics. If not, focus on electrolytes. Better without them at all.
2. Electronics that work in frost and start in frost are two big differences, as they say in Odessa. Especially, there is a problem of launching impulse circuits: power supplies, converters, etc. Either testing, or advice "experienced" for each circuit solution.
3. Sealing the box is not a complete solution. Silica gel may not help. It is necessary to cover the entire board with a protective varnish. Entry points for cables, sensors, etc. cover with sealant, make a box, at least under IP65 and put a valve. This will protect against moisture and condensation. Or, just fill all the electronics with VIKSINT-ohm
4. Be sure to follow the formation of galvanic pairs in the design.
5 Forced heating is not a good solution, especially for a stand-alone device.
6. A well-designed video camera only works better when the temperature drops :-), but who knows what they stuffed into it, into the electronics.
7. About lubrication - said above. In electric motors, only mechanical places are vulnerable to temperature due to lubrication. To make the motor sealed - I do not advise it because of condensate, or take a special version.

Answer 2

Consumer electronics works up to +5 degrees. Place in heated box.
Frost is not as terrible for motors as for gearboxes - the grease will thicken and hello.