Does it actually cause fibrillation at the heart, like an AC signal, or clamping (DC)?
I would think that if it caused fibrillation, there would be a lot more deaths from these.
Re: disreguarding high voltage signs - There was a local tagger here who breached a substation barrier and began to spray paint. The subsequent arc flash left him with burns over 60% of his body. But, being young, he clung to life for several more days.
While I agree that the voltage claims seem highly exaggerated for sales purposes, I will be a bit of a devil's advocate about the maximum voltage across a spark gap. Let's state some assumptions: in atmosphere, clean air, within 1000' of sea-level, 25%..75% RH. Are you also assuming steady-state conditions or transient? I would expect ionization of the air across the gap to take some amount of time.
At one time I heard a radio ad for a system called "Black Max", which was supposed to be ablke to shock attempting car-jackers.That was probably ten years ago. I thought that was a very good idea, but I have not been able to locate the product. But the question is about how to complete the circuit, since just one terminal can't deliver much of a shock, at least not under normal conditions. And it would not bother me at all to put an attacker who had a gun at some risk, since getting shot is usually quite a bad thing. But 50,000 volts at even just ten milliamps is 500 watts, which is a lot of power to come from any package. But it would probably deliver enough zap to send the bad guys off in search of someebody less well protected.
But that protection system seems to have just gone away.
Good point, armorris. Medical cardioversion typically uses fairly high voltage, with extremely low currents (in the mA range). On the surface, the low currents would appear to be benign, but coupled with a high voltage (100 V to 700V, as I understand), it's enough to stop a person's heart and allow it to re-set. So while it's true it doesn't kill the patient, it does stop the heart momentarily. Maybe a reader who designs these devices can weigh in with more (and better) information.
Thanks for the info, AWltom. I'm amazed they did that. I quickly looked on Amazon for a stun gun, saw the 14,000,000 V part number and assumed they were claiming that it was 14 million Volts. It's clearly a marketing ploy, and I'm sure I'm not the only one who made that ssumption.
I did not have my hand up, Rob. The reporter who volunteered also allowed it to be filmed by a crew, and I think he was sorry he did. The Wall Street Journal actually posted it on their web site for awhile, but then they pulled it down, which was a good move. By the way, I have a nephew who's an Oakland police officer, and I believe he had to be tazed as part of his training.
In an age of globalization and rapid changes through scientific progress, two of our societies' (and economies') main concerns are to satisfy the needs and wishes of the individual and to save precious resources. Cloud computing caters to both of these.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.