Any suggestions for flying with electronic prototypes?
I am often flying (2-3 times a month) with prototypes, probes, and odd-looking (to non-engineers) pcbs. Throughout the world, I have found that putting my potentially questionable pieces in their own bin while going through security usually resolves any issues up front. In general, this isn't even necessary.
If you get questions, simply say "it is a prototype that does ." Korman's response is cute, but I never found a need to use anything like that. Turns out most people don't want to look stupid, so don't treat them stupid when they ask. Give a true and reasonable response and most people will be happy with that.