Re: My findings on 555 Ign. Coil spark maker thingys

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

Original poster: "R Heidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>

on 11/30/01 8:17 PM, Tesla list at tesla-at-pupman-dot-com wrote:

> Original poster: "Bob Bozarth by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <jbdetails-at-prodigy-dot-net>
> 
> Aside from a few major components, all of my first coils effort has been
> spent on the Ignition coil driver from
> <http://www.geocities-dot-com/CapeCanaveral/Lab/5322/coildrv.htm>http://www.geo
> cities-dot-com/CapeCanaveral/Lab/5322/coildrv.htm. Except I changed the single to
> a
> dual coil. I did this by connecting the - to + and the + to - on the two
> coils.
> Then the one each of the output wires from the timer went to one of the -/+
> crossover wires on the coil. It worked really good, but I had some extra
> transistors and wanted to experiment a little. I found a MJE3055T, which is
> the
> same as a 2N3055 but in the smaller TO220 package.Worked twice as good, yet
> barely got warm where the 2N3055 wood got hot enough to sizzle a moist
> fingertip. I just wanted to share this tidbit. For all I know it's common
> knowledge to most but I feel good when I discover things like this. If only I
> could figure out how to not toast my 555 timers, there're so sensitive. I
know
> they are cheap but 2 to 3 a day? ( I experiment allot!)
> 
> Bob Bozarth
> Experimenter
> 
> 
> 
I hope thes helps. Use a seperate LM78xx voltage regulator to supply power
to your 555 and an opto-isolator on the output of your 555. The
opto-isolator is just a LED and a photo diode coupled together you can buy,
make. or strip one out of an old floppy drive,
   Robert  H