The problem is, that if it is not perfectly airtight, then the next time you open it, you find the little silica gel packets floating in a puddle of water. :-)
If it is not perfectly airtight, then every time it rains, or a cold front passes, the box cools and it sucks in a little wet air (or rain). If the leak is not at the bottom of the box, then the condensation builds up as water there. It takes a year or so. It is easier to drill a little 2 or 3 mm hole in the center of the bottom of the box, than to make something perfectly airtight. Particularly if you have wires going into and out of the box. --- Graham == On Mon, Apr 18, 2016 at 12:32 PM, evilwulfie <evilwul...@gmail.com> wrote: > Or if your sure the box is sealed and there is no chance of water getting > in use some silica jell in the little pouches that will absorb all the > moisture that is in the box. > > > > On 4/18/2016 7:36 AM, Graham wrote: > > > > On Monday, April 18, 2016 at 7:49:09 AM UTC-5, Gerald wrote: >> >> Put it in a watertight box. Google NEMA boxes. >> >> Gerald >> >> >> Put it in a watertight NEMA box, but always make sure there is a 'weep > hole' in the bottom of the box. > Otherwise the humidity inside the box when you closed it will condense out > on the components when the temperature drops. > > The 'weep hole' needs to be big enough to let humidity equalize between > the inside and out side, small enough to not let insects get inside, and > somewhere in the central bottom where rain will never hit the hole. > > --- Graham > > == > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit > <https://groups.google.com/d/msgid/beagleboard/95b1f388-34d3-4d48-8fd4-956c3827169b%40googlegroups.com?utm_medium=email&utm_source=footer> > https://groups.google.com/d/msgid/beagleboard/95b1f388-34d3-4d48-8fd4-956c3827169b%40googlegroups.com > . > For more options, visit https://groups.google.com/d/optout. > > > > > <https://www.avast.com/en-us/lp-safe-emailing-2109?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=oa-2109-v2-a> > Virus-free. > www.avast.com > <https://www.avast.com/en-us/lp-safe-emailing-2109?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=oa-2109-v2-a> > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/uPEfixR3rrQ/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > beagleboard+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/57151A32.5090105%40gmail.com > <https://groups.google.com/d/msgid/beagleboard/57151A32.5090105%40gmail.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CANN_KV5jWuFQzbHZohQ5VRgvLWWLqEB6pyqprJ%3Dtv-kY8SyHtg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
