Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 52 users online :: 4 registered, 0 hidden and 48 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Ignition Coil Question

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
Sponsored 
  • Author
    Message

Ignition Coil Question

Unread postAuthor: revans » Wed Feb 27, 2008 2:41 am

I have put together a camera circuit as an spark ignition (this one here): http://www.spudfiles.com/forums/high-po ... 10486.html

and have wired it up to an ignition coil as shown in the tutorial (this one): http://www.trademe.co.nz/Browse/Listing ... =142048864

Unfortunately its a bit bulky so I'm looking for a smaller coil. I found this one here: http://www.trademe.co.nz/Browse/Listing ... =141907286

The smaller coil is in a different form factor though so I'm a bit confused. Would it work for the camera flash circuit above?
  • 0

User avatar
revans
Sergeant
Sergeant
 
Posts: 81
Joined: Sat Jul 28, 2007 1:33 am
Reputation: 0

Unread postAuthor: mark.f » Wed Feb 27, 2008 7:03 am

Here's my suggestion: stick with the larger coil. I played around with one of those coils and fried it with only a 12 volt battery, much less a photoflash capacitor...
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3465
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: revans » Thu Feb 28, 2008 2:36 am

That's bad, I really need to find a coil that's a bit smaller.
  • 0

User avatar
revans
Sergeant
Sergeant
 
Posts: 81
Joined: Sat Jul 28, 2007 1:33 am
Reputation: 0

Unread postAuthor: TurboSuper » Thu Feb 28, 2008 5:55 am

markfh11q wrote:Here's my suggestion: stick with the larger coil. I played around with one of those coils and fried it with only a 12 volt battery, much less a photoflash capacitor...


That's because it specifically said not to be used with a 12V battery :D .

I Googled about that type of coil, and apparently it's designed to run off a high voltage DC discharge from a capacitor. That sounds like a camera flash to me, although what size cap it should be, or what voltage is beyond me.
  • 0

"If at first you dont succeed, then skydiving is not for you" - Darwin Awards

TurboSuper
Brigadier General
Brigadier General
 
Posts: 986
Joined: Thu Jun 16, 2005 1:44 pm
Reputation: 0

Unread postAuthor: revans » Fri Feb 29, 2008 6:00 pm

So TurboSuper do you think the smaller coil would work with a camera flash circuit then, seeing as it's basically a capacitor discharge?
  • 0

User avatar
revans
Sergeant
Sergeant
 
Posts: 81
Joined: Sat Jul 28, 2007 1:33 am
Reputation: 0

Unread postAuthor: TurboSuper » Sat Mar 01, 2008 11:13 am

I did some Googling around, and found this:

http://www.next.gr/view-link.php?id=353

This design uses a 2uF cap charged to about 340V.

The cap in a camera flash is much larger, but you can change it easily enough.

The real problem is the 340V; most camera flashes I see only go up to about 200V.

I'm not sure if it won't give you a spark, or just give you a smaller spark.
  • 0

"If at first you dont succeed, then skydiving is not for you" - Darwin Awards

TurboSuper
Brigadier General
Brigadier General
 
Posts: 986
Joined: Thu Jun 16, 2005 1:44 pm
Reputation: 0

Unread postAuthor: rcman50166 » Sat Mar 01, 2008 11:19 am

look up what a marx generator is. That is much more effective than any ignition coil, camera circuit, or tazer could possibly be. And even an idiot could make one! :D
  • 0

Image
User avatar
rcman50166
Colonel
Colonel
 
Posts: 697
Joined: Sat Jan 19, 2008 7:11 pm
Location: Bethel, CT
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: jimmy101 » Sat Mar 01, 2008 12:08 pm

TurboSuper wrote:The real problem is the 340V; most camera flashes I see only go up to about 200V.

I've looked at several flash boards from disposable cameras and they all charge to better than 300V.

rcman50166 wrote:look up what a marx generator is. That is much more effective than any ignition coil, camera circuit, or tazer could possibly be. And even an idiot could make one!

Not sure how you figure that. You need a pile of suitable capacitors, a fairly large construct to house all the caps and gaps, a voltage supply, etc.
A stungun is cheaper and a heck of a lot simpler. A photoflash is cheaper but a bit more difficult to get to work properly. A photoflash + igntion coil is trivially simple, fairly cheap and much easier to get to very high voltages than a Marx Generator.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3130
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: TurboSuper » Sat Mar 01, 2008 1:06 pm

Oh, well I guess the flash board I had sucked then.

Anywho, it's a trivial matter that can be easily solved with a multimeter in a matter of seconds.
  • 0

"If at first you dont succeed, then skydiving is not for you" - Darwin Awards

TurboSuper
Brigadier General
Brigadier General
 
Posts: 986
Joined: Thu Jun 16, 2005 1:44 pm
Reputation: 0

Unread postAuthor: revans » Sat Mar 01, 2008 5:59 pm

Thanks for the suggestions. Unfortunately I'm in a country (NZ) where stunguns are illegal so as jimmy101 said my next best alternative is a photflash + ignition coil. Does anyone know if smaller coils like the one linked to in my first post would work with a photoflash instead of the big 12v ones?
  • 0

User avatar
revans
Sergeant
Sergeant
 
Posts: 81
Joined: Sat Jul 28, 2007 1:33 am
Reputation: 0

Unread postAuthor: MaxuS the 2nd » Sat Mar 01, 2008 6:35 pm

  • 0

User avatar
MaxuS the 2nd
Colonel
Colonel
 
Posts: 674
Joined: Sat Jan 19, 2008 3:59 pm
Reputation: 0

Unread postAuthor: TurboSuper » Sat Mar 01, 2008 8:41 pm

revans wrote:Thanks for the suggestions. Unfortunately I'm in a country (NZ) where stunguns are illegal so as jimmy101 said my next best alternative is a photflash + ignition coil. Does anyone know if smaller coils like the one linked to in my first post would work with a photoflash instead of the big 12v ones?


Do you suffer from chronic amnesia or something? We've been in the process of answering that very question all day, haven't we?
  • 0

"If at first you dont succeed, then skydiving is not for you" - Darwin Awards

TurboSuper
Brigadier General
Brigadier General
 
Posts: 986
Joined: Thu Jun 16, 2005 1:44 pm
Reputation: 0

Unread postAuthor: revans » Sat Mar 01, 2008 10:28 pm

Maxus: I have seen that tutorial having searched for it previously and having used it to make the camera flash circuit I have right now. I know there are photos of the circuit being used with a similar small coil but they are not the same as what I linked to and I was merely wondering if anyone who might know of or have used such a coil could give me a definitive yes or no about whether it would work. Cheers.
  • 0

User avatar
revans
Sergeant
Sergeant
 
Posts: 81
Joined: Sat Jul 28, 2007 1:33 am
Reputation: 0

Unread postAuthor: MaxuS the 2nd » Sun Mar 02, 2008 4:50 am

You just need to find the outputs using a voltmeter.
  • 0

User avatar
MaxuS the 2nd
Colonel
Colonel
 
Posts: 674
Joined: Sat Jan 19, 2008 3:59 pm
Reputation: 0

Unread postAuthor: revans » Sun Mar 02, 2008 1:42 pm

The outputs of my camera flash circuit? Oh well, I don't have/want to spend money on a voltmeter anyway so can't do that one. Thanks though.
  • 0

User avatar
revans
Sergeant
Sergeant
 
Posts: 81
Joined: Sat Jul 28, 2007 1:33 am
Reputation: 0

Next

Return to Combustion Cannon Discussion

Who is online

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], Yahoo [Bot]

cron
Reputation System ©'