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ignition system

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ignition system

Unread postAuthor: XXpotato-cannoneerXX » Tue May 03, 2011 4:29 am

wooops... my bad :roll: :wink:

but then lets try again :D


would circuit work as an ignition system for my planned potato cannon or would it be dysfunctional ??

plz let me know if you guys got some other ideas 8)
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Unread postAuthor: jackssmirkingrevenge » Tue May 03, 2011 4:32 am

No need to start another thread, you could have used the Image button to fix your original post.

Anyways, the diagram you posted will not work, because 9 volts is not enough to jump a spark gap. You need coils that will up the voltage, as in a camera flash circuit.
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Unread postAuthor: Technician1002 » Tue May 03, 2011 4:58 am

If you used a proper hot wire for ignition such as a model airplane glow plug, the circuit would function. The voltage would need to be changed as glow plugs use 1.5 volts.
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Unread postAuthor: jackssmirkingrevenge » Tue May 03, 2011 5:02 am

Technician1002 wrote:If you used a proper hot wire for ignition such as a model airplane glow plug, the circuit would function. The voltage would need to be changed as glow plugs use 1.5 volts.


You could also get some nichrome wire - usually found in heating elements - as I did here:

[youtube]http://youtube.com/watch?v=OmLNm6Myg7s[/youtube]
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Unread postAuthor: XXpotato-cannoneerXX » Tue May 03, 2011 5:15 am

sorry but im kinda noob at potato cannons...
so what is a hot wire ??
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Unread postAuthor: XXpotato-cannoneerXX » Tue May 03, 2011 5:22 am

what if i replace the on / off switch with a piezo !! :wink:


Edit by Moderator (MrCrowley): Please do not double post. Use the edit button instead. The same goes for your previous topic, instead of making a new topic you should've posted in the old one you originally created.
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Unread postAuthor: jackssmirkingrevenge » Tue May 03, 2011 5:25 am

XXpotato-cannoneerXX wrote:what if i replace the on / off switch with a piezo !! :wink:


on/off switch and batteries, yes.

A hot wire is simply a piece of wire which gets hot when you run a current through it, usually nichrome wire which offers high resistance and doesn't melt or oxidise.

edit: LOL @ Zeus' Philosoraptor :D
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Unread postAuthor: XXpotato-cannoneerXX » Tue May 03, 2011 6:24 am

where should i put the camara flash circuit on my diagram ?!? :happy7:
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Unread postAuthor: Crna Legija » Tue May 03, 2011 7:49 am

the wires from the flash tube one need to go to the red wire and one to the blue wire.
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Unread postAuthor: jimmy101 » Tue May 03, 2011 7:19 pm

XXpotato-cannoneerXX

Don't make things more difficult than they need to be. Get a BBQ piezo for $10~$15. Or a long handled fireplace lighter for ~$5.
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Unread postAuthor: mark.f » Tue May 03, 2011 8:19 pm

$2.15 for one of those long-nosed igniters at the dollar store. :D They work quite well in standard combustions and low-mix hybrids.
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Unread postAuthor: Technician1002 » Tue May 03, 2011 9:27 pm

mark.f wrote:$2.15 for one of those long-nosed igniters at the dollar store. :D They work quite well in standard combustions and low-mix hybrids.


One worked fine for me. I broke off the tip and pulled the wires and attached them to a pair of electrodes in the chamber. It worked on my very first try.
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sorry but im kinda noob at potato cannons...
so what is a hot wire ??


Risking breaking rule #1... :D um a wire that is not cold. This is bad in an extension cord and causes ignition of homes. This is good in electric hair dryers and makes the air warm. You can get a piece of the wire from a broken hair dryer to use for ignition. A short piece and a proper high current battery will work well. The length will need adjusted to match your voltage source so it heats properly.
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Unread postAuthor: XXpotato-cannoneerXX » Wed May 04, 2011 1:36 pm

yeahh.. thanks for the good answars :wink:
but the fact is that i want a proper multi spark ignition and not some cheape piezo 8) :D
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Unread postAuthor: Technician1002 » Wed May 04, 2011 1:48 pm

Multi spark ignition will simply require a higher voltage source such as a stun gun or a multi burner BBQ grill igniter.

http://www.appliancefactoryparts.com/search/partinfo.php?partsID=1057555&modelsID=&typeName=gas%20grill
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Unread postAuthor: XXpotato-cannoneerXX » Thu May 05, 2011 10:52 am

i thought of that too.. but i live in a little country called Danmark and there they simply dont have that sort of BBQ igniters :x :D
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