Obviously figure out how rugged and shock proof you want it. From there, you can design the shell and component mountings to withstand the shocks. And then make

Obviously figure out how rugged and shock proof you want it. From there, you can design the shell and component mountings to withstand the shocks. And then make sure you don't get any thermal problems with whatever chips you'll want to use. In other words, find an engineer who designs physical things, and get him on board (or at least get him to give you a quick rundown of stuff).