As a teenager, much to my delight, I discovered this ability of an infinite number of 9V to interconnect in this way. Alas, I had only about 30 of them but I still managed to use this stack of 20 to 30 as the B+ supply for a triode vacuum tube circuit. I was _extremely_ careful with it and didn't leave the entire stack connected for very long. I did not try shorting it as the guy in the video does. The guy in the video does seem, to me, to appreciate that there IS a danger. I think what he does not realize is the importance of using proper test equipment and test leads, as Russell points out. Also, I hope that he was wearing good eye protection because the energy involved could easily have ruptured one or more of those 9V batteries when he shorted it. I think one thing that saves him is that even fresh 9V batts have a fairly high internal resistance and these were not fresh batteries. Sean On Wed, Jan 30, 2013 at 9:00 AM, RussellMc wrote: > An insane You tube 'demonstration' of the results of series connecting 24= 0+ > 9V "PP3" cells. > > The commentator has absolutely no idea whatsoever that he is poised on th= e > brink of death throughout the whole video. > > AND, his resul;ts are stunningly feeble, considering he has over 2000V on > hand. > Apart from some nicish arcs. > Here, stand aside, let ME show you what you can do with 2000 V ... :-) > > http://www.youtube.com/watch?v=3D8hwLHdBTQ7s > > DO NOT try this at home. The clip lead insulation could rupture, the > surface could track, random anythings could explode with immense violence > and throw misc material at highh velocity. Measuring 990 V DC on a semi > random digitial multimeter AND holding the leads. Such luck this guy has. > > If you can educate any of the up and coming generation that such things a= re > able to be lethal at any moment please do. > > > Russell > > Ref: Iain M. > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .