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Old 03-30-2014, 12:38 AM   #21 (permalink)
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Quote:
Originally Posted by chrisgerman1983 View Post
I think I would have had to run the higher voltage directly to the big cap?
Yes, but there's no way to run 18V into anywhere on that flash and get the result you expect.

The existing inverter is designed for 6V, which it then turns it into ~350V. So you'd need to build an inverter to turn 18V into ~350V.

Or just connect a rectifier to your 240 VAC clothes dryer plug and run that to it. You'd end up with around 340V DC.

(NO! I CAN'T BELIEVE I WROTE THAT! KIDS, DON'T TRY THIS AT HOME!)

Seriously, don't do that! And heirs, don't sue me if he does! :-)

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Old 03-30-2014, 01:03 PM   #22 (permalink)
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You could always visit a radio shack or an online equivalent and make a cascade voltage doubler and in no time you can get your 18 volt battery to a few hundred to few thousand.
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Old 03-30-2014, 03:25 PM   #23 (permalink)
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the built-in inverter on those are crap. You can do boost or even h-bridge (into a 12v wall wart) -> doubler to get to 300v. (plus you need a 4000-8000v trigger)

I'm liking the LED approach, looks like that will fire repeatedly, all day, with less losses. Will need to play with the exposure. But it looks like that is where "flash" has been headed for a while(more efficient, don't need 300+ volts, no glass parts). little xenon tubes get in trouble with overuse/overheat.

http://www.cap-xx.com/resources/docs...D_flash_v3.pdf

Edit, well, long exposure times have their caveats too.


Last edited by P-hack; 03-30-2014 at 03:39 PM..
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