Bursting Balloons !

Bursting Balloons !
click on image for more

Monday, July 12, 2010

The Flash-bulb

Previously when I was taking high speed images of breaking light bulbs a few people mentioned that they would look better with a glowing filament .
Tonight I opened an older flash and un-soldered the wire from the capacitor to the flash tube and wired it in series with a 220 volt light bulb . The red wires and dotted red line show where it used to be connected .
When  I have the old flash on low output the flash fires weakly but there is no response from the filament .
When I switch it over to high power I get a reaction - but a little too much . I need to get the right amount of power to have the filament glowing without blowing out the exposure .


 More 'experiments ' to follow :)
 
15 minutes later and I had opened another older flash with thyristor control - in the hopes that I could get the flash to turn off sooner for a dimmer glow  . Not to be !
I faced the sensor toward a white surface to help it detect the flash and hopefully turn off quickly . It still gave out too much power .
At first I was confused as to why the optic flash trigger would not fire this flash but then I remembered that when I checked its trigger voltage it was "-8 v" , the earth pin was in the centre which was not normal - the electronics of the optic trigger could not switch a 'backward voltage' .




13/07/2010
Tonight I ran the wiring through a soldering iron as well to waste some of the energy . Now I have a controllable glow that will look right at iso200 and F16 .



This 'diagram' shows the path of the the current flowing through the circuit . The blue lines show where the wires were originally connected . The lower blue wire was cut and connected to the red clip going into the soldering iron . The current flows through the soldering iron and back down through the black clip which is connected to one of the terminals of the light bulb . The circuit is completed as it flows back from the other terminal and through the flash tube . Each item represents a volt drop of some sort and the coil of the soldering iron probably adds an inductance to slow things down a bit . The voltage drop across the light is just enough for a light glow and the rest of the energy is wasted in the soldering iron and across the flash tube .











17 July 2010 .
I bought some cheap light bulbs but unfortunately they only had frosted bulbs . I managed one ok shot with the one clear bulb I had .


and a few of the frosted bulbs ....




24 July 2010 .
I got hold of 10 clear light bulbs finally . I tried various 'devices' to destroy them and got some pretty decent results .




and a couple with the sword ....




And then I noticed my axe leaning up against the wall and decided to do a few with it .







Perhaps when I get exactly what I want I will spend some time processing the images to look better but I would really like to get it right in camera rather :)









9 comments:

  1. Not just for this post but in general, keep up the posting, and testing and crazy stunts with whatever you can lay your hands on.

    rgs,

    Matt

    ReplyDelete
  2. Don't encourage me :)I've already had a few threads removed on a forum !

    ReplyDelete
  3. You continue to have more fun than a human being should be allowed to have. I'd encourage you to carry on, but I know you don't need the encouragement.

    ReplyDelete
  4. I think this is an informative post and it is very useful and knowledgeable. therefore, I would like to thank you for the efforts you have made in writing this article. Best led grow lights

    ReplyDelete
  5. This comment has been removed by the author.

    ReplyDelete
  6. Hi, I find reading this article a joy. It is extremely helpful and interesting and very much looking forward to reading more of your work.. how-safe-are-christmas-laser-lights

    ReplyDelete
  7. At Mister Sparky, we offer a wide selection of electrical services to choose from. We believe that you deserve the convenience of an excellent electrical system, and we are confident that our Santa Rosa, CA electricians can make that happen. Whatever electrical services you may need, we are the company you can count on to get the job done right.

    ReplyDelete
  8. I'm glad to see the great detail here!. https://krm.net.au

    ReplyDelete
  9. Awesome article, it was exceptionally helpful! I simply began in this and I'm becoming more acquainted with it better! Cheers, keep doing awesome! The Brightest Candelabra Bulb for Your Home (Tips & Reviews)

    ReplyDelete