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[Reply #15 on:]

When you short-circuit a 9v battery with a ball of steel wool, it burns very quickly. You can get a few strands from the steel wool and get a 9v battery and drive that with a MOSFET. It's simple and cheep.

[Reply #16 on:]

Have a look at this I made for remotely firing fireworks. I used an arduino to control a relay and nichrome wire.

http://www.youtube.com/watch?feature=player_embedded&v=LdICz38Yft4

All the information needed including videos and circuits is on the blog.

http://gampageek.blogspot.co.uk/2012/12/normal-0-false-false-false-en-gb-x-none.html

[Reply #17 on:]

There are 2 relays on the Arduino Motor shield right?  How much current to you send to a Talon Igniter?  I read at least 12v on Amazon.  The Talon Igniter looks like a 1 time use?  That would be ideal, but not offered in smaller quantity and at a fair price!

http://www.amazon.com/100pcs-2MFireworks-Firing-System-Igniter/dp/B00A5ZMWU6/ref=sr_1_1?ie=UTF8&qid=1359400482&sr=8-1&keywords=Talon+Igniter

[Reply #18 on:]

I don't think there are any relays on the standard arduino motor shield, it uses H-bridges on a chip.

You can use an arduino pin to get a transistor to trigger a relay. The relay can then switch 9v (say 2 Amps) this can make thin nichrome wire glow hot. Wrap the nichrome wire around a match (non safety type) and you have a homemade igniter. You could use a mosfet instead of a relay.

[Reply #19 on:]

the reaction of hydrochloric acid with aluminium basically creates hydrogen and chlorine gas via an exothermic reaction

Or maybe not.   If you add aluminum to hydrochloric acid,  you usually get hydrogen gas and a solution of aluminium chloride.....  but the chemistry in your country may differ.