I've been working on a custom GPS device that I got some help on regarding power (thank you again!), and am now thinking about putting it in an actual box. The device has to live outside all year round, in all kinds of weather (including freezing temps), going without power for weeks at a time (the user will bring the battery), and possibly (likely) be dropped on the ground. It also needs to be handheld and, just to make it even more complicated, needs to have a servo-operated trap door.
A little context: the device is for a game called geocaching and the player will use it in a forest; the issue is that the device itself will live in the forest (when not in use, it will be in a waterproof container). The idea is that the player/user will attach the battery, wait for the GPS to get a fix, press a button, and the device will pick a random spot for the user to get to in a particular amount of time. Once the user makes it there (taking the device with), an LED will light up and the timer will start over, requiring the user to get back to the original spot. Assuming the user is successful, a servo motor will turn and open the trap door to allow the user access the log book, which will be inside the device itself.
So the device itself consists of a GPS module, the Arduino (currently an Uno but possibly a Mega because I'm running out of pins and the program may be larger than 32k), a microSD card (to write the coords with the date and time to preserve them in case the user unplugs the battery), an LCD, LED, button, and servo. And all the accompanying wiring. And the log book (standard small spiral notebook).
So the trick is to find/build a container that can hold all this equipment, allow easy access to the battery connector while protecting it from the elements, be strong enough to handle a drop, and if possible I'd like to isolate the area with the log book from the rest of the device so the user can't peek inside and see the equipment.
Might anyone have some thoughts on how doable this is...I've been contemplating welding something custom together, but even if I do that, I'm still not sure how all this equipment will take to the elements...
Thanks for any suggestions!