Just a safety warning, I am working to make sure I take every precaution to make my info understandable & safe to most non-electrically inclined people. I may be a certified electrician, but I am not a certified teacher or particularly eloquent. I would suggest buying & reading a book on basic...

How much voltage/amps is too much to leave exposed? It's quite common to attach a 9v battery to an led as a throwie. Quite obviously...this must be safe. I've never heard a throwie killing someone. So...a buddy of mine at work and I got into a conversation about how much voltage is okay to...