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Proper casing and fusing for an outdoor arduino project

Discussion in 'Microcontrollers, Programming and IoT' started by Lei Reyes, Oct 17, 2014.

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  1. Lei Reyes

    Lei Reyes

    Jul 2, 2014
    hello everyone ,

    1. 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) -----> card.html
    1pc long distance IR detector module (link) -----> range IR sensor.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)

    2. and also, if i want to have one central fuse for the relay card, ir detector and the arduino, what fuse would best suit for them ?
    thanks in advance guys !
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    You need to find a sealed enclosure and use proper cable glands to ensure that the box remains sealed where cables pass into the box. If you use a metal box, then it can act as a heatsink. Otherwise you can connect the heatsink to the bolts holding the box to the wall, metal post, etc to transfer heat out of the case.

    Having a white (coloured or painted) box will help keep the electronics cooler if this is out in the sun.

    How much heat is dissipated in the box?

    what's a led pin light? is it internal or external to the sealed enclosure?
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Oh, the best fuse is one rated appropriately for the load. I don't fully understand what the total load is, so that's pretty much all I can say.
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