Hi,

There is already a commercial product available for this application called
"Magic Fire".  They were designed for the pyrotechnic industry to allow the
precise bursting of multiple firework shells simultaneously.  I also think
Disney uses them (or else have developed their own) with their air launch
system.

As I recall, it took a lot of R&D... not getting the units to survive
launch, or the timing, but the safety issues.  They must have the ability
to be remotely armed and disarmed. They must not have their own power
supply, but be charged immediately prior to launch by the firing
system.  This is obviously a very potentially dangerous, even lethal device
if it fails... prematurely detonating in the gun, or worse, when being
handled. I've never worked with these devices because the precision of
pyrotechnic timer fuses continues to improve and the cost of each igniter
is expensive to use in any kind of quantity (last I heard they were $5).
They must also be integrated into a shell or pyrotechnic device during
manufacturing, increasing their cost further.

Not trying to dissuade you from a cool project, but explosive applications
have *huge* risks involved. If you decide to try and develop your own
version, I hope you have some serious product liability insurance.  :)

- Mike

At 01:19 AM 6/2/2002 -0700, you wrote:
>Hi
>
>This is a bit of a strange question. I keep stumbling into strange (but
>interesting)
>projects to play with.
>
>What is the maximum vibration level and/or G force standard smt or thruhole
>will tolerate ?
>
>I've been asked if I could figure out a electronic detonator for an
>airburst charge
>for snow guns. These are the guns/mortars they use to fire 4-8lb charges at
>potential slides to trigger them. The trigger will be a pic that simply counts
>and then fires a electric match after the preset delay.
>
>I'm hoping this will prove tremendously difficult so I get to "work" and
>have to blow
>things up all winter ;-]
>
>Tia
>
>Dave
>
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