Proper casing for an outdoor arduino project

Projects General Guidance
1

hello everyone ,

may you help me find or create a good design of a casing that contains the ff:
1pc arduino uno
1pc relay card module (link) -----> http://www.e-gizmo.com/KIT/relay%20card.html
1pc long distance IR detector module (link) ----->http://www.e-gizmo.com/KIT/Long%20range%20IR%20sensor.html

  • it will be placed in the outside my house
  • the system will detect human presence and turn on a siren and a light
    (led pin light with 28V 7W rating, siren with 12V 1A)
  • it will be exposed to sunlight, probably under 35 degrees temperature
  • it must operate 24/7 , no turning off

i am considering what type of material must the case be made of, the need for ventilation, heat sink, etc . (feel free to add more)

thanks in advance guys !

2

Siren? Light? 12v Source? Where are these coming from? Just the housing that comes with one of these items may have a bit of spare space to hold what you want.

3

Look for IP68 enclosures. Also get IP68 cable glands.
You will be surised that the cost of the enclosure exceeds the cost of the electronics.

4

Outdoor temperatures won't hurt anything. Rain or insect infestation are your primary enemies. You do need to anticipate condensation on the inside of the box, no matter how "IPXX" the box claims to be, so try to keep things mounted off the sides and nothing can be on the bottom of the box. You'll also need to keep your IR sensor shaded from direct sunlight or it'll behave erratically.

Lots of people around here use plastic, food storage containers for their projects so don't think anyone will poke fun at you for using just about anything you can find at the local store. If you want to go fancy you can try electronics distributors like Mouser or Farnell but like nilton says those boxes get really expensive.