## PSN-L Email List Message

Subject: Re: How many volts ?
Date: Wed, 13 Jun 2007 12:34:00 -0700

```I gave the best answer with the information I had.  I'm not terribly
familiar with the hardware you're discussing.  I thought you were
talking about an inductor, not a transformer. :-)

Transformers are simple ratios.  For example, let's say we have a
(secondary coil:primary coil) 10:1 (step-up) transformer plugged into a
USA wall socket.  That would yield a result of 1200V (10/1 x 120V).

A step-down transformer with the same properties as above (except a 1:10
ratio) would yield 12V (1/10 x 120V).

Am I getting closes to what you want?

On Wed, 2007-06-13 at 07:46 -0700, Geoffrey wrote:
> You are talking BEEP School, But its more like
> 2 turns = 2X V and 4 turns is 4X V or something
> along those lines.
> Im talking Transformer design and not this stuff.
> But P=I^2R would tell you the copper losses
> and for max power transfer the Z in must equal the Z out.
>
> ----- Original Message -----
> To:
> Sent: Tuesday, June 12, 2007 21:53
> Subject: Re: How many volts ?
>
>
> >E = I x R
> >
> > E = volts
> > I = current (Amps)
> > R = resistance (Ohms)
> >
> > There may be a reactance phase shift from the coil/magnet that may or
> > may not need to be taken into account.
> >
> > Hope that helps.
> >
> > On Tue, 2007-06-12 at 03:18 -0700, Geoffrey wrote:
> >> There are formulas for figuring out voltages and turns
> >> and magnetic fields such as design formulas for
> >> transformers since most power today is AC.
> >> But it has been so terribly long ago that I ever
> >> did such things I can no longer tell the technical detales.
> >> Plain Old Physics should have an ideal kind of law
> >> but give you an excellent idea of what to expect.
> >> The internet is the best place to start looking
> >> but out there is some mathematician/physicist that would love
> >> to share his knowledge with you.
> >> Possibly an old Electronics book that deals with such things
> >> as designed for understanding by a layman/noobe.
> >> Mathematicians must account for all units etc. but i think
> >> for a laymen experimentation and curve tracing can
> >> give you good results so long as the goes ins and outs
> >> are close enough for government work.
> >> Simply matching a math curve to the data points found
> >> so you put in the known to get the unknown without
> >> knowing what goes on in the middle.
> >> Magic Numbers and stuff.
> >> (I just wish i knew a few myself)
> >>
> >>
> >> ----- Original Message -----
> >> From: "Jón Frímann"
> >> To: "PSN-Postlist"
> >> Sent: Monday, June 11, 2007 05:25
> >> Subject: How many volts ?
> >>
> >>
> >> Hi all
> >>
> >> I got a coil and magnet from Larry today and I was wondering what the
> >> voltage level of the coil is. But the coil is 9000 ohms.

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