Re: Ignition Coils (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 10 Jul 2007 23:27:26 -0400
From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: Ignition Coils (fwd)

Daniel,
     I think putting an ignition coil across 120 V AC is asking for a pile 
of molten copper (correct me if I'm wrong guys).  They are meant for 12 V or 
so DC input (off a condenser, triggered by the distributer), and get HV out, 
by operating at resonance (like a TC, using one off of turns ratio alone 
doesn't amount to much).  You have to drive the coils with a small solid 
state circuit (either a 555 timer based circuit, or you can be tricky, and 
use a circuit like this
http://www.personal.psu.edu/sdb229/plasma%20ball%20power%20supply.html
just wind three windings on a small toroid core transformer (pirated out of 
something) and they will be your primary, and feedback windings, as well as 
a winding to put voltage into you ignition coil.  I have never actually 
tried this, but it does work with flybacks, so it should work with an 
ignition coil as well.)  After you have your ignition coils resonating at 
whatever frequency they work best at (my circuit may not perfectly match 
their frequency, therefore may not be the most efficient, but it is real 
easy), you rectify their outputs (parallel as many as you want for maximum 
power, give each coil its own driver though), and make yourself a tiny DC 
coil.  I wouldn't rule out subbing in flybacks instead of Ignition coils, 
but you might have to use the old AC type, and rectify them, as I think the 
polarity of modern rectified flybacks is wrong for your application (maybe 
it doesn't make a difference!  I don't know).  Good luck.
Scott Bogard.


>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: Ignition Coils (fwd)
>Date: Tue, 10 Jul 2007 20:50:52 -0600 (MDT)
>
>
>---------- Forwarded message ----------
>Date: Wed, 11 Jul 2007 02:31:53 +0000
>From: Langer Giv'r <transworldsnowboarding19@xxxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: Ignition Coils (fwd)
>
>hey that looks like a pretty good schematic.  Thanks.  Just a quick 
>question
>on it:  The signal generator being the 555 does not show which prongs to
>use.  The 2N3055 transistors are pretty staight forward, but I can't figure
>out which of the 8 prongs to use on the 555.
>
>this is the page that shows the schematic i'm looking at:
>http://www.rmcybernetics.com/projects/DIY_Devices/homemade_tesla_coil.htm
>
>Also, if I wanted to use more power, would I be able to use 120V AC to 
>power
>the coils? (kinda like a small version of a NST)  Would i need heavy
>resisting or ballasting?  Could i just use like three in parallel to
>increase the voltage I can put accross them?
>
>
>Daniel
>
>
> >From: "Tesla list" <tesla@xxxxxxxxxx>
> >To: tesla@xxxxxxxxxx
> >Subject: Re: Ignition Coils (fwd)
> >Date: Tue, 10 Jul 2007 18:53:01 -0600 (MDT)
> >
> >
> >---------- Forwarded message ----------
> >Date: Wed, 11 Jul 2007 10:03:16 +0930
> >From: Roger Foreman <rebus@xxxxxxxxxxxxxxxx>
> >To: Tesla list <tesla@xxxxxxxxxx>
> >Subject: Re: Ignition Coils (fwd)
> >
> >Gentleman, I've been one of those avid listeners sitting quietly in the
> >background for the last few months.
> >I've learnt a great deal about TC and related HV technology in that time 
>-
> >I'm grateful to you all.
> >Langer, I'm working on something similar to you (desktop size TC) The
> >fellows at www.rmcybernetics.com have a straight-forward circuit 
>featuring
> >adjustable frequency and duty cycle, specifically intended for driving
> >loads
> >such as ignition coil/s. Hope this helps.
> >
> >Regards Roger
> >
> >----- Original Message -----
> >From: "Tesla list" <tesla@xxxxxxxxxx>
> >To: <tesla@xxxxxxxxxx>
> >Sent: Wednesday, July 11, 2007 8:22 AM
> >Subject: Ignition Coils (fwd)
> >
> >
> > >
> > > ---------- Forwarded message ----------
> > > Date: Tue, 10 Jul 2007 22:47:24 +0000
> > > From: Langer Giv'r <transworldsnowboarding19@xxxxxxxxxxx>
> > > To: tesla@xxxxxxxxxx
> > > Subject: Ignition Coils
> > >
> > > Hello.  I'm planning on building a new table top TC powered by 
>ignition
> > > coils.  My first tesla coil was powered by 4 MOT's, so this is a
> > > significant
> > > power drop, but I'm just looking for efficiency not power.  What is 
>the
> > > best
> > > way to do it?  (ie. how many could you use, do i need a voltage 
>doubler,
> > > do
> > > i need any solid state equiptment,  etc.)
> > >
> > > Thanks a lot for the help,
> > >
> > > Daniel
> > >
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