Pigtail Neons :)

[Art]

Ok, I got it No heat from anything, but I'm not sure the 1N004 protection
diodes are working, I get a zap with my fingers across the backs of both of them.

It's hard to see with the video, but they are two channel software PWM,
the light is moving back and forth between the two neons.

I think the transformer primary in the original circuit was very low impedance.
It's a short on my continuity meter, it's so low. That would look bad for the MJE3055 output.

Still have to sort out this stray high voltage problem.

[Art]

pic:

[pedja089]

1N diode won't do much at higher frequency.
Try to find some UF diode, or some schottky 60V diode, 1A...
Edit:
Add a lot of decoupling capacitors(10nF,100nF)
I think that you didn't put diode right way.
It should be like this
http://i.stack.imgur.com/Oarz3.gif
You can try to put 1N4148, but it probably won't last long...

[Art]

I have used the diode like the second example on this page:
http://electronics.stackexchange.com...nsistor-switch
The first way actually prevented the neons lighting, no matter what polarity the diode across the primary.

I don't have anything other than rectifiers at the moment, but will see how I go tomorrow.

[pedja089]

Second example won't do anything to spikes, it just prevent transistor from negative voltage.
I think that mosfet would be best solution. Because it have zener diode between source and drain.
You can also make RCD clamp, like this
http://m.eet.com/media/1055546/C0541-Figure4.gif

[Art]

Second example won't do anything to spikes, it just prevent transistor from negative voltage.
I think that mosfet would be best solution. Because it have zener diode between source and drain.
You can also make RCD clamp, like this
http://m.eet.com/media/1055546/C0541-Figure4.gif

Will a P-Channel MOSFET directly replace the MJE3055?
http://www.jaycar.com.au/products_uploaded/ZT-2467.pdf

Note this schematic has no protection diodes at all.

[pedja089]

N channel mosfet will replace MJE3055... But you need one with logic level gate, to be able to drive them directly from pic output.
EDIT:
This might be helpful
http://www.dos4ever.com/flyback/flyback.html

[Art]

It looks like IRF540N then. It has 1-4Volt gate.. I could use a resistor on the pic output because it is 5 Volts.