On 29 March 2015 at 02:57, Rossano Gobbi <rossano86@hotmail.com> wrote:

> The most useful experience we made at school was with a power supply
> designed to try&feel the current flow across your body. I don't know if
> that's common in electronic schools but it should.
> You get one terminal in your hand and the other near the elbow, you/the
> teacher can vary the current with a knob. Then you feel the current flowi=
ng
> - muscles blocking... impressive.
>
> Apart from that I've just only experience with a few 230VAC shock. The on=
e
> I remember very well is when I accidentally touched a connector at our ho=
me
> mains entrance. Probably being before the RCD made it more effective than
> usual...
>
>
Memories surface.
Telephone hand ranked alternator.
Pot of salted water.
Coins at bottom.
Hold one wire and try to retrieve coins.
A "friend" cranks the alternator.
I think the coins were probably quite safe.

_________

An RCD bites quite nicely as it trips.
By the time they became common I'd got past receiving mains shocks except
on pecial occasions and leap years, if then.
Si I tried an RCD protected circuit shok across the back of a hand. A safer
place than many - just not safe. The RCD tripped but the shock was still
significant.

___________

Warning - THE FOLLOWING IS "NOT SAFE" FOR THE SQUEAMISH.
(I'm not too happy with such things even though a meat eater).

I have a friend who at one stage (officially) tested electric fence safety
on anaesthetised sheep.
(He said that getting ethics approval for such things takes some effort
even though the end result is greater sheep safety.)
His task was to make a shock system that synchronised fence discharge with
the t phase of the sheep QRST cycle - the most sensitive point shock wise.
At full power the shock never managed to kill the sheep due to heart
effects **BUT** he says the breathing cycle was affected and the sheep died
of asphyxiation.



     R
--=20
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