I had another thought with the timing. Has anyone tried electrically firing a cake. Could make for very good timing.
Cakes (the Official Thread)
Started by portfire, Mar 11 2008 05:11 PM
110 replies to this topic
#106
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Posted 02 June 2010 - 02:08 PM
#107
BrightStar
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Posted 02 June 2010 - 02:54 PM
I had another thought with the timing. Has anyone tried electrically firing a cake. Could make for very good timing.
Some big Cat4 cakes now come with a separate quickmatch leader for each row, the advantage being that if you set up more than one accross a front you can keep them in perfect synch.
I remember watching the Dubai Atlantis opening with the 'waves of fire' running out along the arms of the island in unison and thinking that this might have been one of the techniques used.
Edited by BrightStar, 02 June 2010 - 02:54 PM.
#108
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Posted 02 June 2010 - 07:53 PM
i was thinking something like this, with a 5 bit multiplexer and control it with a pic. i think its and interesting way of getting 100 cues. although i probably wouldn't need 100 ques, just separate ques for the tubes on the fan's and single Que for all fire rows. so id probably only need about 55 ques, but you get the point.
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Posted 02 June 2010 - 08:13 PM
I'm sure someone will point it out, so i will first i know i have got the transistor on the wrong way round for the -ve side.
#110
BrightStar
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Posted 02 June 2010 - 08:42 PM
It's more likely that you'd put a multiplexed firing connector on something like a comet fan rack than a cake, due to the high costs and safety issues involved.
Small single shot comets are availble commercially, similar to the individual tubes in a barrage. They allow for shot by shot timing with great precision, at the extra cost of an e-match and firing system channel per tube. Pre-wired looms of e-matches are available on a single connector for this purpose.
PS: The circuit you've illustrated is basically a 'diode multiplex' as used by MLE and others(though you forgot the diodes
)
Small single shot comets are availble commercially, similar to the individual tubes in a barrage. They allow for shot by shot timing with great precision, at the extra cost of an e-match and firing system channel per tube. Pre-wired looms of e-matches are available on a single connector for this purpose.
PS: The circuit you've illustrated is basically a 'diode multiplex' as used by MLE and others(though you forgot the diodes
)
#111
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Posted 02 June 2010 - 09:14 PM
why does it need diodes?
i was looking to have a comet fan in the cake. i was thinking of having 2 fans left to right and right to left, then an all fire row and repeat.
how much for an ematch loom?
i was going to ask if anyone had access to commercial ematches as the only ones Ive found that are pre-dipped are not far off £1 each, plus theres the old favorite request of QM, just down to does anyone think my contributions to the forum have earned me the right to be trusted to buy some yet. lol
i was looking to have a comet fan in the cake. i was thinking of having 2 fans left to right and right to left, then an all fire row and repeat.
how much for an ematch loom?
i was going to ask if anyone had access to commercial ematches as the only ones Ive found that are pre-dipped are not far off £1 each, plus theres the old favorite request of QM, just down to does anyone think my contributions to the forum have earned me the right to be trusted to buy some yet. lol
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