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  • How to Build a Simple But Powerful Flyback Driver

    I solved the problem. It was really just a simple mistake on my part. I have been doing a lot of work with a joule thief and so i wound the primary coils in the wrong polarity. I fixed it to just a simple centre tap and now it works like a charm. I just have to better insulate the secondary because i can hear the corona coming off it.

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  • How to Build a Simple But Powerful Flyback Driver

    I really hope some one can help wit this. I built this almost exactly and its not really working. First off, i made a power supply from a transformer to put out 56VAC and about 11A shortedI used a full wave rectifier and a large cap to smooth it out. I got IRFP260N mosfetsI dont know the henries of the inductor, but its about the same size as in the picture and i put more than 20 turns. I went with 1k ohm 2w resistors instead of the 470ohm (as recommend) I coiled my own secondary for the fly back.As i read through all this I'm realizing that i didn't use the 15v zeners and i kept the primary turns at 5 each. The problem I'm having is that when i hook it all up and turn on the power the i get about 24V on the secondary of the flyback. So obviously it is oscillating just I'm not getting a...

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    I really hope some one can help wit this. I built this almost exactly and its not really working. First off, i made a power supply from a transformer to put out 56VAC and about 11A shortedI used a full wave rectifier and a large cap to smooth it out. I got IRFP260N mosfetsI dont know the henries of the inductor, but its about the same size as in the picture and i put more than 20 turns. I went with 1k ohm 2w resistors instead of the 470ohm (as recommend) I coiled my own secondary for the fly back.As i read through all this I'm realizing that i didn't use the 15v zeners and i kept the primary turns at 5 each. The problem I'm having is that when i hook it all up and turn on the power the i get about 24V on the secondary of the flyback. So obviously it is oscillating just I'm not getting a higher voltage and i defiantly should be. I took a small cap and put it on the secondary and by just tapping a 3volt battery on the primary i charged it up to about 160v. So it should be working, but its not. Im now wondering if not putting more than 5 turns on the primary and using a 15v zener are the cause. Also, my mosfets get really hot. I can only turn it on for a few seconds at a timeAny one know whats going on with this?

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  • user number seven commented on Plasmana's instructable Build a Simple Marx Generator1 year ago
    Build a Simple Marx Generator

    so i got a question for you, roughly how much did it cost? I did some looking around and to have all the parts shipped to me (no place near by sells these components) it would cost me $120cad

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