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I've heard of this problem being related to not enough voltage to drive the MOSFETs, have you tried going over 12v?
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Can you help me understand how to use two supplies? I'm just confused as to where the negative of the flyback supply goes, just to ground? So the flyback supply connects to the drain and source, withe the primary and resonant cap/diodes/caps etc and negative to ground?
The vid at the end shows a test with 250n at 70v, its generally even better.
The Plasma Speaker
Weekend Projects: My ongoing Plasma Speaker (singing arc) project.
Well shhh...oot I hope I don't need one that strong just yet, I'm also researching on DIY vacuum pumps to construct electron accelerators lol, Let me know what you come up with!
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Yeah like switch said, the amperage is just waaaaay too high, MOTs are only a couple amps with 4 - 6 capacitors added, its more the voltage as well
It depends on AC or DC but I always think 35V just to be safe as I use AC quite often and the rule is about 50VAC. Just don't touch wires and you'll be fine lol
Preach it, brother!
In that case then couldn't you scale this down to be just as effective or is the surface area that important?
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I recommend the ZVS driver here https://www.instructables.com/id/ZVS-Driver/ I power it with a variable transformer I got on amazon for like $50, then run it through a full bridge rectifier to get DC voltage. Most parts I got from scavenging CRT TV boards, the rest online. I use IRFP250n MOSFETs. I've had this badass up to 65v with no heat issues or burnouts, only problems are the flyback arcing to itself or the voltage getting so high it arcs right through wire jackets, give it a shot!
I think its power supply related. I use IRFP250n MOSFETs and used the same schematic you did but I power it with a Variac running through a full bridge rectifier to get the DC power I need and I have zero issues with heat, the only problem I have is the flyback arcing to itself and the voltage getting so high it arcs through wire jackets lol
Here's my little guy, seems like this is the only reasonably priced type of cap you can get like this, unless anyone knows where to get the doorknobs for less than like $70 a piece? Anyway, the first build was a lot tighter than this one and testing it burned out the OBT's primary and killed one of the diodes, so I got new diodes and remade it with more room and tested it with a microwave oven transformer which, obviously not as much voltage, but enough to test and it works great! Now to replace my OBT....
You could use a voltage multiplier, BurningSunTech has a great instructable on here to make one, the amperage is only like 350mA, but you wouldn't want 50kV with this much amperage anyway unless you're trying to die lol
Yaaaaaay! I love this thing, I did a little Jacob's Ladder thing with it:
Kind of hard to see but nice long arcs even at ~12v and goes easily up to 35v+, but it starts getting kind of dicey in the safety department that high. I have mine powered by a variable AC transformer (Variac) through a full bridge rectifier for DC. Initially I tried using a modified PC PSU, but like someone else said it's circuit protection shorts it out almost immediately. With the variac I once made a mistake by turning the dial the wrong way (derp) and it was up to about 60v for a brief moment and still functioned properly haha, excellent build!
(This instructable is dead.) Singing Arc Plasma Speaker project - revision 2.0!
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