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Help with Capacitor ignition

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Help with Capacitor ignition

Unread postAuthor: Dgealy » Fri Feb 27, 2009 1:11 am

I am working on an electronically triggered camera flash circuit using a capacitor. I am using a triggered spark gap: [urlhttp://www.spudfiles.com/spud_wiki/index.php/Camera_flash[/url].

My problem is that I need to put a switch into the transformer trigger. It is extremely low amperage, but high voltage (240V). Is it possible to use a standard relay for this? It has a very small welding characteristic, but nothing significant.
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Unread postAuthor: Insomniac » Fri Feb 27, 2009 6:34 am

Most switches will work, the welding the trigger cap does isn't that significant. So long as it's decently insulated it should be fine.
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Unread postAuthor: ralphd » Fri Feb 27, 2009 7:46 am

Would you consider a stun gun? In my opinion it gives the best bang for the buck ($15)and is extremely easy to hook up.
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Unread postAuthor: rp181 » Fri Feb 27, 2009 8:09 am

welding is caused by high current, almost any switch will work.
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Unread postAuthor: mark.f » Fri Feb 27, 2009 10:42 am

Take a look at the switch that's in there already. It's (usually) just a thin strip of metal that contacts the circuit board.
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Unread postAuthor: trigun » Fri Feb 27, 2009 6:28 pm

All of the camera circuits have make just have any switch firing them with all 660volts running through it.
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Note epoxy cure time very important barrels are hard to remove from the wall
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