Old 09-23-2010, 03:16 PM #1
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Default 1.25 Kilojoule DIY Coilgun

Anybody see this thing?

I think I found my next project


Watch This 1.25 Kilojoule DIY Coilgun Smash Various Household Items



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Old 09-23-2010, 04:06 PM #2
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Default Re: 1.25 Kilojoule DIY Coilgun

This has been on my project list for a while. I already have the flyback, and a couple of caps. Still have a ways to go though.
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Old 09-23-2010, 04:17 PM #3
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Default Re: 1.25 Kilojoule DIY Coilgun

Yup whilst building my Tesla's, i threw together a mini coil gun, thier suprisingly simple, but boy do they make a bang when you close the contacts on those caps!
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Old 09-23-2010, 07:04 PM #4
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Default Re: 1.25 Kilojoule DIY Coilgun

Man that thing is gnarly! Looks pretty complex to build though...



Quote:
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Anybody see this thing?

I think I found my next project


Watch This 1.25 Kilojoule DIY Coilgun Smash Various Household Items

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Old 09-23-2010, 07:18 PM #5
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Default Re: 1.25 Kilojoule DIY Coilgun

It kind of reminds me of the BFG from Doom.
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Old 09-24-2010, 06:23 AM #6
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Default Re: 1.25 Kilojoule DIY Coilgun

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Originally Posted by jayrob View Post
Man that thing is gnarly! Looks pretty complex to build though...
Yeah making all that compact and portable is very impressive. But electrically it's pretty simple. For 1.25kj the velocity wasn't spectacular. But I suppose thats as good as it gets with a single coil. The multistage coil guns are much more efficient at transferring the magnetic energy into the projectile's kinetic energy. They start to rival real firearms at that point.

I like the ZVS charging circuit. Those circuits are very efficient. I've built one of those before, although mine is much more that 400v, more like 20kv, but at a lower current.

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Old 09-25-2010, 01:44 AM #7
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Default Re: 1.25 Kilojoule DIY Coilgun

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This has been on my project list for a while. I already have the flyback, and a couple of caps. Still have a ways to go though.
Yours going to be about the same power as this one?
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Old 09-25-2010, 04:01 AM #8
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Default Re: 1.25 Kilojoule DIY Coilgun

Years ago, I tried to make a rail gun to shoot a BB. Didn't work at all. This coil gun is interesting.
Is that "bullet" a magnet itself? Where's the plans?

When the field collapses, where does that energy go? Is there a damping diode to protect the SCR?

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Old 09-25-2010, 05:21 AM #9
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Default Re: 1.25 Kilojoule DIY Coilgun

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Yours going to be about the same power as this one?
Like most of my projects, I'll build it to the point my funds allow. The reason why is that I'm disabled from a work accident. So I only have so much play money a month. So every month I gather parts I can afford. Mostly fleemarket stuff. Right now I'm on the hunt for a 15kV 60mA transformer for my Jacobs Ladder. Finding one for under $75 shipped is another story.
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Old 09-25-2010, 06:17 AM #10
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Default Re: 1.25 Kilojoule DIY Coilgun

Now if only I could find a source for that very hard to find 5mw laser pointer...
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Old 09-25-2010, 06:25 AM #11
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Default Re: 1.25 Kilojoule DIY Coilgun

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Originally Posted by Tech_Junkie View Post
Like most of my projects, I'll build it to the point my funds allow. The reason why is that I'm disabled from a work accident. So I only have so much play money a month. So every month I gather parts I can afford. Mostly fleemarket stuff. Right now I'm on the hunt for a 15kV 60mA transformer for my Jacobs Ladder. Finding one for under $75 shipped is another story.

What is a Jacobs Ladder?

Is this it?

Jacob's Ladder Total Body Exerciser - Jacob's Ladder - Allegro Medical Supplies


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Old 09-25-2010, 06:33 AM #12
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Default Re: 1.25 Kilojoule DIY Coilgun

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I bet it would be more effective if you put the electric jacob's ladder at the bottom of that one....
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Old 09-25-2010, 06:38 AM #13
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Default Re: 1.25 Kilojoule DIY Coilgun



You know what a coil gun is but not a Jacobs Ladder?

Edit: Funny guy. I just saw the ()

Last edited by Tech_Junkie; 09-25-2010 at 06:43 AM.
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Old 09-25-2010, 06:47 AM #14
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Default Re: 1.25 Kilojoule DIY Coilgun

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Originally Posted by Tech_Junkie View Post

You know what a coil gun is but not a Jacobs Ladder?

Edit: Funny guy. I just saw the ()
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Old 09-25-2010, 06:55 AM #15
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Default Re: 1.25 Kilojoule DIY Coilgun

Hey, its late, err, early.

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Old 09-25-2010, 07:15 AM #16
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Default Re: 1.25 Kilojoule DIY Coilgun

You know if you want to make a cheap Jacobs Ladder, why not make a high voltage ZVS driver instead of finding an NST? It would be a more challenging build than just using an NST but all the components are pretty affordable. And you say you've already got a flyback.

http://laserpointerforums.com/f54/vi...tml#post786718

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