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| Technological Terror For the discussion of items of technology such as motors, controllers, motion sensors, audio boards etc. Also to discuss how to hack commercial electronic props. |

06-24-2008
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Lightning question
Hi all,
I had an idea for an interesting lighting effect - a projected skull, JOL etc that is visible, say, on a wall, between the lightning flashes, but is not visible when the lightning is not flashing. Kind of like this:
No lightning, blank wall.
Between each lightning flash, a face is projected onto wall.
I have two of the F/X boxes and have been trying to figure out how to configure them to do this. Anyone have ideas as to how this might be done?
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06-24-2008
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Lunatic
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Join Date: Dec 2007
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Thats a cool idea.. not sure how you could accomplish it tho.
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06-24-2008
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Desensitized
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Join Date: Dec 2007
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Hey Otaku, would it work to have the sound track split onto a dvd with surround sound? That way one channel would feed the audio, one the lightning, and one the skull face?
Been trying to wrap my brain around doing it with just stereo, but the only think I could come up with is 2 different players that you could try to manually sync. That wouldn't be pretty, but would be the easiest.
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06-24-2008
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Moderator
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Join Date: Dec 2004
Location: Newark, CA
Age: 59
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I think you're on the right track with the surround sound idea, Bilbo. I keep trying to picture a way to do it with just stereo (one channel delayed) and all the methods end up with the skull face being on when there is no lightning. Depending on how bright the face projector is, it might work if the skull face stays on during the entire lightning sequence. The bright lightning could wash it out so that it would be only visible between flashes, then goes off during the no-lightning intervals. Hmmmm...
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Thousands of years ago, cats were worshipped as gods.
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06-24-2008
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2 left feet 2 right socks
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Join Date: Jan 2006
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Like the idea. Kind of like a subliminal message.
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06-24-2008
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Moderator
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Join Date: Dec 2004
Location: Newark, CA
Age: 59
Posts: 2,865
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Liked 15 times in 10 posts
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Quote:
Originally Posted by Frighteners Entertainment
Like the idea. Kind of like a subliminal message.
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My thoughts, too. This effect could be done with two F/X boxes, one adjusted for the lightning flashes, the other set to near maximum so that the output is essentially "on" for the duration of the sound. The output cable from the sound source would be split to plug into both boxes.
If a thunder delay isn't needed, one track could be a constant tone that matches the length of the thunder and keeps the output high without having to max out the sensitivity control (which might tend to blow fuses).
I know I'm gonna have to try this.
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Thousands of years ago, cats were worshipped as gods.
Cats have never forgotten this.
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06-24-2008
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One of us. One of us.
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Join Date: Feb 2007
Location: North Texas
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Perhaps a gel on one light that is the same color as the projection.
Gel on...no image.
Gel off....image.
I don't know if that is any help.
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06-24-2008
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Terrible Peril
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Join Date: Jul 2007
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Yes Otaku...That is a good idea...nice effect, I'll bet you can pull it off
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06-25-2008
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Lunatic
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Join Date: Mar 2007
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Only way I can imagine is to use logic gates and a microcontroller. But then I know little (i.e. Jack) about electronics so I'm certainly not the one to offer advice lol
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06-25-2008
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Fearless
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Join Date: Jul 2007
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Maybe this flip/flop unit from haunt master http://hauntmasterproducts.com/11.html
They have a few nice not too pricey event timers also.
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