From: Joseph Legris
X-Mailer: Mozilla 4.77 [en]C-SYMPA (Win95; U)
Subject: Re: OT (sort of) help for a total newbie
References: <firstname.lastname@example.org> <3DB1721B.C79A99F3@webaccess.net>
Date: Sat, 19 Oct 2002 17:37:18 -0400
NNTP-Posting-Date: Sat, 19 Oct 2002 17:31:07 EDT
Organization: Bell Sympatico
Chuck Simmons wrote:
> Justin Farrelly wrote:
> > Hi Luke,
> > Like the others I too am concerned about you heading off into the world
> > of 110VAC on your first project. Many of us who are most probably
> > a little older than you are steer well clear of 110VAC, and basically
> > anything over 48V just because it does go wrong so easily. It is
> > very unforgiving if you accidently make yourself part of the circuit,
> > and most professionals who do design work at 110V work in an
> > environment where it is compulsory for other CPR trained workers
> > to be present at all times: I know, I work in that space sometimes,
> > and have a few scars to show for it!!
> > On a positive note, there are lots of really excellent things you
> > can do at low cost, that will run on batteries, and fit in your pocket
> > if you wish. Many of these you can experiment with to your
> > hearts content and even if you do get it wrong, many times the
> > components will forgive you (well, once or twice!!).
> > This is definitly the place to get help, with lots of friendly people,
> > and many, like myself would be happy to see if we can help you
> > get something built you can be proud of.
> > Have a think about what you want to do, and mail us back!!
> I have mixed feelings about the warnings in this thread. We don't know
> anything about the OP, of course, except that he is young. However, at
> my age, cops look like school children.
> Some of us here grew up in the 1950s and messed with electronics then.
> Everything seemed to involve voltages above 100 volts. The adults around
> me in those days seemed to assume that because I was smart enough not to
> touch a hot stove, I could probably manage to stay out of trouble with
> The warnings, however responsible and reasonable, are inconsistent with
> the behavior of some of us older posters when we were young.
> Did you ever see a bunch of grade school kids holding hands in a circle
> while someone cranked an old telephone ring generator? Ever see the old
> prank of connecting a Model T ignition coil to a door knob? There are a
> lot more that no one would ever do today.
But there is a big difference between a 400 VDC power supply rated at
100 mA (the kind that bit me so many times that I developed a very fast
arm withdrawal reflex) and 110 Volts fused at 15 Amps. Sure, they can
both electrocute you but only the latter is likely to start a fire. In
my opinion the potential for public liability outweighs the danger of