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 Boost converter
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| ZakWolf |
 Wed Feb 29 2012, 05:58PM |
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Registered Member #3114
Joined: Sat Aug 14 2010, 03:33AM
Location:
Posts: 452
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I am building a compact pistol coil gun and need a very small circuit for charging.
Sorry to ask, I have searched 4hv and Google for 2 days now and having found what i want.
I would like a boost converter that utilizes a irf510 and a 555, or just a small transformer driven by the irf510 that puts out ~400v.
Input voltage ~3-6v
At least something better then those awful flash circuits.
Im trying to do this with scrap parts i have.
Any help is much appreciated.
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| __=|(:3)-|--{__ |
| Wed Feb 29 2012, 06:04PM |
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Registered Member #3324
Joined: Sun Oct 17 2010, 01:57PM
Location: UK, Dorset, Broadstone 
Posts: 816
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what about a tiny ZVS with a computer PSU ferrite core rewound? |
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| ZakWolf |
| Wed Feb 29 2012, 06:28PM |
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Registered Member #3114
Joined: Sat Aug 14 2010, 03:33AM
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Posts: 452
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made with irf510's? Its gotta be 3/4" long X 3/4"wide X 1/2 tall
This  or this ? |
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| ZakWolf |
| Wed Feb 29 2012, 08:30PM |
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Registered Member #3114
Joined: Sat Aug 14 2010, 03:33AM
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Posts: 452
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I used this and a 4 stage multiplier and got 200v with 6v in.
Is there any way to make output more? remove a resistor or change a value ?
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| Turkey9 |
| Thu Mar 01 2012, 02:00AM |
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Registered Member #1451
Joined: Tue Apr 22 2008, 10:48PM
Location: Boulder, Co
Posts: 660
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Boost converters are pretty easy and can be made very small. There are examples all over the internet of their theory. Read up on that and you'll be able to put one together that should be able to meet your needs. |
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| Forty |
| Thu Mar 01 2012, 10:58AM |
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Registered Member #3888
Joined: Sun May 15 2011, 04:50PM
Location: Erie, PA
Posts: 644
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.75"x.75"x.5"? That's certainly a size restriction. The only things I could imagine fitting into that are a 555 driver with a camera transformer (as is or carefully rewound), a single transistor circuit like the original camera circuit, or a boost converter. A boost converter might have the best power output and will easily allow for charging regulation because they tend to use the 555 timer. two well known examples can be found at and (2nd or 3rd variants) |
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| Marko |
| Thu Mar 01 2012, 11:09AM |
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Registered Member #89
Joined: Thu Feb 09 2006, 08:40AM
Location: Zadar, Croatia
Posts: 3142
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Tom Williamson wrote ...
what about a tiny ZVS with a computer PSU ferrite core rewound?
Yup, certainly looks like a much better idea than the infamous boost converter.
An ATX transformer will offer loads of power but a smaller one could also be used, especially if the battery pack is not able to provide hundreds of watts peak.
Marko |
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| ZakWolf |
| Thu Mar 01 2012, 01:11PM |
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Registered Member #3114
Joined: Sat Aug 14 2010, 03:33AM
Location:
Posts: 452
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Beam tetrode wrote ... Tom Williamson wrote ...
what about a tiny ZVS with a computer PSU ferrite core rewound?
Yup, certainly looks like a much better idea than the infamous boost converter. An ATX transformer will offer loads of power but a smaller one could also be used, especially if the battery pack is not able to provide hundreds of watts peak. Marko
ATX transformer as in the yellow things?
I have a mini core .5X.5X.5 that i can rewind.... very tricky
Can i power the ZVS with 6v and can i use irf510 mosfets ? wimpy little things
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| Pinky's Brain |
| Thu Mar 01 2012, 02:59PM |
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Registered Member #2901
Joined: Thu Jun 03 2010, 08:25AM
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Posts: 828
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You can buy small purpose build flyback transformers for capacitor charging by Wurth and Coilcraft, they are a couple bucks, fall right in the voltage range you want and are compact.
Some people here have used them before :
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| ZakWolf |
| Thu Mar 01 2012, 05:30PM |
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Registered Member #3114
Joined: Sat Aug 14 2010, 03:33AM
Location:
Posts: 452
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Pinky's Brain wrote ... You can buy small purpose build flyback transformers for capacitor charging by Wurth and Coilcraft, they are a couple bucks, fall right in the voltage range you want and are compact. Some people here have used them before :
i dont want to order anything, im trying to make everything.
Thanks though
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| Forty |
| Thu Mar 01 2012, 05:38PM |
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Registered Member #3888
Joined: Sun May 15 2011, 04:50PM
Location: Erie, PA
Posts: 644
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coilcraft samples them for free. They've got lots of inductors as well. |
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| ZakWolf |
| Thu Mar 01 2012, 06:10PM |
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Registered Member #3114
Joined: Sat Aug 14 2010, 03:33AM
Location:
Posts: 452
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Forty wrote ...
coilcraft samples them for free. They've got lots of inductors as well.
Will the zvs charger work with irf510's? |
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