Re: The incredible inedible ignition coil

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Steve Cook by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Steve-at-g8cyerichmond.freeserve.co.uk>

There is a problem with the 555 timer plus 2N3055 route. The 2N3055 actually
needs quite a bit of current to drive it into conduction, and the standard
555 timer is running at its limit, it is better to use a darlington pair in
this configuration, or a power mosfet. The 555 plus 2N3055 may work for a
time, but the chip may burn out at any time.

----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, February 24, 2001 7:44 PM
Subject: Re: The incredible inedible ignition coil


> Original poster: "Georg Sickinger by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <sickinger-at-web.de>
>
> >
> > > you don't need feedback from the coil to make an oscillator.. You
could use
> > > a resistor in the collector lead, for instance, coupled with a
capacitor.
> > >
> > > Or make a 555 driving a 2n3055 type circuit.
> > >
> > > BTW I'd use something like a horizontal flyback transistor or a
electronic
> > > ignition transistor.  They have much higher BVceo than that 60V for
the
> > > 2n3055.
> >
> > Oh yea!I once saw a circuit for a soldid state tesla coil using just a
power
> > transistor 2n3055 and a resistor and capacitor.I forgot how it was
> > connected.Seems simple but can someone help me out?
> >
> > matt
>
> If you need the plan of connection look at:
> http://home.t-online.de/home/0947197197-0001/flyback.htm
> Although it is written in German it will help you I hope
>
> Georg, Germany
>
>
>
>