The benefits of DC are that power losses for the same amount of power
received at the far end. are lower. Transformers can't work on DC,
and they are necessary to raise the voltage to high levels so current
levels can be lower and losses lower. So, until transformers became
understood, as Tesla did and Edison didn't, there was that
controversy. Only with the advent of transistors capable of switching
DC and making it into AC was high voltage long-distance transmission
of DC practical.
Guess you've never seen a cattle prod in use. The older ones run on D
cells. I think they use 4 or 6 of them. The newer ones seem to be
They'll shock a cow real fast, and there is a large arc and loud snap.
I've seen them in use. I'd sure hate to get zapped with one.
If I ever find one cheap at a garage sale or auction, I'll buy it just
to open it and play with the electronics inside. (I dont own cattle,
and would not use it on them if I did..... seems cruel).
On the other hand, I have gotten zapped with an electric fence many
times. Once I was sweating and got it against my forehead. Knocked me
right on my ass.
Back in the day, when I was a cop, one or two officers had 6-cell Maglite
flashlights. Except that the flashlight contained only FIVE cells. The space
formerly taken up by the bottom D-cell contained an, um, "goblin getter,"
attached to two 1/4" pins in the base of the flashlight.
If the stink-eye wouldn't cooperate by following some simplest request
("Okay, asshole, what is the largest prime number less than 100,000? Eh?
Eh?"), he, or rarely she, could be encouraged to follow a righteous path.
Sometimes for as long as ten minutes!
In police equipment catalogs, I've seen punk-prods thinly disguised as
As has been pointed out, one problem is that you can't smash anything - or at
least anything you value - with the heavy and hard contraption.
That aside, they're wonderful. If you luck out, the fly gets wedged in the
wiring grid and will actually catch fire. If that doesn't warm your heart,
you're a lot more stoic than I.
I had one stop working for no obvious reason, but given the low price it was a
no-brainer to replace it. I haven't gotten so much practical pleasure out of
an inexpensive purchase in a long time.
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