Hello All, My apologies for the "newbie" question -- I was hoping someone on this list might know or could point me to information on how to find out if a product requires FCC approval before selling it commercially. Perhaps a couple of examples would help to clarify the question: 1. If I were to build a *very* simple 12C508-based, 3v circuit that simply flashes an LED at some varying rate, would I require FCC approval to sell it (assuming, of course, that anyone wants to buy it :-) ? If I installed this same simple circuit into two different plastic "toys", would I need to get separate approval on each form of the toy, even though the internal circuits are identical? 2. What if I'm working with a single customer that needs a few "custom" PIC- based circuits installed to, say, enhance their warehouse security system. Each circuit may or may not be the same as the others. Would I need to get FCC approval on these before I could sell and install them? Sorry if this has already been covered. Thanks in advance for any pointers! Mark Winters