[TCML] Building a pulse generator

[Dr.Hankenstein]

Speaking of mistakes, that is the worst schematic I have ever seen. I
would expect the 2N3055 to pop after the first pulse! First of all, I
would put a pre-driver transistor on the base of the 3055 to lessen the
burden on the 555. Next (and this is very important) the 3055 needs to
be protected with a reversing diode from collector to emitter. The
reverse pulse from the coil will very likely exceed the max voltage
rating of the 3055 when the transistor turns off. There are other things
I don't like about this schematic. Too much to dwell over.

Good luck,
Hank

-----Original Message-----
From: tesla-bounces at pupman.com [mailto:tesla-bounces at pupman.com] On
Behalf Of Rhys Sage
Sent: Friday, September 04, 2009 5:54 PM
To: tesla at pupman.com
Subject: [TCML] Building a pulse generator

I build things slowly and talk about them a lot. Talk's cheap; mistakes
cost money.

I'm building the following circuit
http://www.flickr.com/photos/sagephotoworld/3673918744/sizes/o/

It's going to be a pulse generator with the power supply taken from a
12v 4.16A 50W max LCD transformer. 

I have not yet made my mind up as to which ignition coil to use. I
gather there are several varieties. I'll be after 25-30KV so I'll go for
a coil with a rating in that range.

Now my question - by varying the resistance of the two 10k pots, will I
be able to raise the output KW above what the coil normally supplies
(20-25KV)?

Rhys Sage



SagePhotoWorld.com



America's favorite photographer.


      
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