Hey dR, I am about to start putting together this new circuit for pulsing coils, it will double the voltage of the source or nearly double it
into a big cap as a higher voltage supply for the coils to work from. It'll require at least one isolated "floating" driver I think not sure yet. Hopefully not. I'll need two PWM IC's. This circuit is still theoretical.
I'll post some parts details as I go. It should be good for driving Tesla coils.
Anyway while I was stripping an old project from the solderless boards to make room I thought I would show you a picture of the mosfet driver setup I was using and mainly the 2 Kohm resistor between the base and emitter on the PNP transister that drains the mosfet gate, the resister there drains the base of the two drive transistors. The driver works like this drawing below but the resistor is not drawn there.
ImageShack® - Online Photo and Video Hosting
And picture tells a thousand words.
ImageShack® - Online Photo and Video Hosting
I'm fairly sure they were working good like that, but I'll be testing them again very shortly anyway.
Here's a video of some results I got just fooling about.
Demo 2-1.wmv - YouTube
Cheers
into a big cap as a higher voltage supply for the coils to work from. It'll require at least one isolated "floating" driver I think not sure yet. Hopefully not. I'll need two PWM IC's. This circuit is still theoretical.
I'll post some parts details as I go. It should be good for driving Tesla coils. Anyway while I was stripping an old project from the solderless boards to make room I thought I would show you a picture of the mosfet driver setup I was using and mainly the 2 Kohm resistor between the base and emitter on the PNP transister that drains the mosfet gate, the resister there drains the base of the two drive transistors. The driver works like this drawing below but the resistor is not drawn there.
ImageShack® - Online Photo and Video Hosting
And picture tells a thousand words.
ImageShack® - Online Photo and Video Hosting
I'm fairly sure they were working good like that, but I'll be testing them again very shortly anyway.
Here's a video of some results I got just fooling about.
Demo 2-1.wmv - YouTube
Cheers
I connected the power and the current meter needle twitched is all. I could tell it was working but everything was opposed or cancelling. I was annoyed at the time and didn't bother to see if there was any output because there was no input.
I just unwound it and tried a different way untill i got what I wanted.

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