I do that all the time and I never have problems. If the goons at airports ask what those things are, the best answer is that you use them for sexual self-gratification. (I use exactly this wording, it frightens them away) I sometimes even develop and test Arduino Programs during the flight. Sometimes the Stewardess looks a bit strange or curious when I unpack my pocket-oscilloscope, but I never got any problems.
Though theses days, put wire-cutters and other tools into the checked baggage. In theory, propane soldering irons might be problematic, but I never had any problems with mine in the checked baggage. Also if you bring those big batteries used for lanterns in your hand-baggage, you might have problems, but I never tried that.
Korman