Reply
 
Thread Tools Display Modes
 
Old 07-15-2006, 12:33 AM   #1
Bus Geek
 
lapeer20m's Avatar
 
Join Date: Nov 2003
Location: near flint michigan
Posts: 2,653
electronic ignition

quick question for you electronic wizards out there.....

i want to find/buy/make a circuit that switches off and on several times per second. What i want to do is connect this switching circuit to an automotive ignition coil to make a spark plug spark.

anyonw have any simple ideas?
__________________
Quis custodiet ipsos custodes (who will watch the watchmen?)
lapeer20m is offline   Reply With Quote
Old 07-15-2006, 01:43 AM   #2
Skoolie
 
eggman's Avatar
 
Join Date: Apr 2006
Location: Hamel, IL
Posts: 160
I am no electronic genius by any means, but would an automotive flasher work?
__________________
Jeff
95 IH 72 passenger transit school bus w/ DT466 and 545 Allison.
79 IH Scout II/392 (0.030 over) Hamilton Injected/727/D300/Full size axles/36" Swampers/Lockers/OBA/38 gal Custom fuel tank, roll bar, tube doors.
eggman is offline   Reply With Quote
Old 07-15-2006, 02:35 AM   #3
Bus Nut
 
frank-id's Avatar
 
Join Date: Nov 2003
Location: Twin Falls, Idaho
Posts: 808
Spark trigger?

What is the purpose for the spark device.? Flaming exhaust? Use an old distributor and turn with 12 volt fan motor with a speed control. Frank
frank-id is offline   Reply With Quote
Old 07-15-2006, 05:39 AM   #4
Bus Geek
 
lapeer20m's Avatar
 
Join Date: Nov 2003
Location: near flint michigan
Posts: 2,653
it is for a flame....propane powered. Size and weight and energy consumption are all issues since it's for a bicycle.

A flasher is an excellent idea, but just isn't fast enough........oh wait....perhaps a flasher that does not have the proper load will flash fast enough......(ya know how it flashes fast when you have a burned out bulb, that just might be the ticket)

I'm gonna go play with that idea!

Thanks

Jason

The distributor powered by a fan motor is good too, but not for the bicycle application (although i dind't mention bicycle in my original post)

We're working on "art" projects for burningman
__________________
Quis custodiet ipsos custodes (who will watch the watchmen?)
lapeer20m is offline   Reply With Quote
Old 07-15-2006, 02:33 PM   #5
Bus Nut
 
frank-id's Avatar
 
Join Date: Nov 2003
Location: Twin Falls, Idaho
Posts: 808
Burning man

I'd sure like to go to that event. Costs lots of money.
My suggestion for a vw or similar distributor could work great. The distributor could be driven from chain or tire. The unit would add some artsy
flavor. I wanna build a motorized picnic table. Got any pics to share?
Frank
frank-id is offline   Reply With Quote
Old 07-15-2006, 09:29 PM   #6
Bus Geek
 
the_experience03's Avatar
 
Join Date: Feb 2006
Location: Saint James, MN
Posts: 2,669
Send a message via MSN to the_experience03 Send a message via Yahoo to the_experience03
The commercially available kits just use a $5 parts store coil and a spark plug. They just turn the thing on and off with a relay. I'm sure something like that could work.
__________________
http://farm4.static.flickr.com/3024/...09f20d39_m.jpg
Skooling it...one state at a time...
the_experience03 is offline   Reply With Quote
Old 07-16-2006, 01:08 AM   #7
Bus Nut
 
Griff's Avatar
 
Join Date: Jan 2005
Location: Off-Grid
Posts: 740
Year: 1982
Coachwork: Thomas
Chassis: IH S1723
Engine: IH V345 Gas V8
Rated Cap: 66
What about those little generators that contact the tire & spin to make a bicycle headlight work? Couldn't you convert the frequency to something usable for your application? That way, as long as the bike is moving, it would have a signal. Of course, signal speed would vary with ground speed without some sort of frequency clip, i.e. headlight brightness is directly proportional to bike speed.

L'il help there, Electrotechies!
__________________
~(G)Q Arduously Avoiding Assimilation
Griff is offline   Reply With Quote
Old 07-16-2006, 03:46 AM   #8
Bus Geek
 
the_experience03's Avatar
 
Join Date: Feb 2006
Location: Saint James, MN
Posts: 2,669
Send a message via MSN to the_experience03 Send a message via Yahoo to the_experience03
Correct me if I'm wrong, Jason, but I don't think you want this thing to be working while you're driving so the tire operated gizmos wouldn't work, correct? I still say go with the generic $5 tractor coil.....
__________________
http://farm4.static.flickr.com/3024/...09f20d39_m.jpg
Skooling it...one state at a time...
the_experience03 is offline   Reply With Quote
Old 07-16-2006, 10:28 AM   #9
Skoolie
 
Kirbystud's Avatar
 
Join Date: Mar 2005
Location: Spencer IA
Posts: 104
Year: 1987
Coachwork: Carpenter
Chassis: Chevy
Engine: 366 Gas
There is a web site you can buy exhaust flame kits.WWW.eatmyflames.com I think it's only $45 for a single.
__________________
What happens on the trail stays on the trail
Kirbystud is offline   Reply With Quote
Old 07-16-2006, 08:31 PM   #10
Bus Geek
 
lapeer20m's Avatar
 
Join Date: Nov 2003
Location: near flint michigan
Posts: 2,653
the coil and a spark plug are not a problem....the problem is how to make it spark.

dewalt 14.4 volt batteries will be used to power the contraption.

When it comes to wireing a 12 volt coil...

Obviously for the high voltage circuit you connect the center of the spark plug with an insulated wire, ground the proper part of the spark plug

the low voltage circuit you connect your ground all the time to the proper terminal, then you connect the hot wire to the proper terminal, and when the hot (+) wire is REMOVED from the terminal the spark plug sparks.

What i'm trying to find, is an electronic device that will connect then disconnect the hot wire going to the coil several times per second.

I think the turn signal flasher will work...the old mechanical type that flashes real fast when you have a burned out bulb in the circuit. I would estimate it to flash at 2 or 3 times per second.



Quote:
Correct me if I'm wrong, Jason, but I don't think you want this thing to be working while you're driving so the tire operated gizmos wouldn't work, correct?
If you had a small propane powerd flame thrower on your bicycle, wouldn't you use it while riding???

I am actually rather amused by the idea of spinning a distributer with the rear tire.......but getting all the geometry correct would be a little difficult..i'm not sure i have the desire to make it bullet proof enough to work everytime. IT is very important to make sure the propane ignites on it's way out of the flame thrower. Unburnt propane floating down toward the operater is less than desirable. Propane is heavier than air. Although it is being used in outside in a well ventilated area, which will certianly help to reduce the danger. I do not remember the LEL and UEL of propane off the top of my head. Natural gas would be a much safer fuel for this setup, but it's difficult to find lng in a bottle. It is used by some city buses and cabs, but not nearly as easy to find as propane.

The propane cylinder (coleman grill size) will be mounted in a safe spot that is easiy accessable to the rider and can be turned off with a quarter turn valve if necessary. The nozzle for the flame will be about 8 feet off of the ground and pointed straight up. The size of the flame should only be about 6 or 8 feet above the nozzle. (as opposed to 30-50 feet for my full size flame thrower)

A super easy and portable electronic ignition would be a tazer, but regular citizens cannot purchase them here in michigan. I think they run off a 9 volt battery or something similar.
__________________
Quis custodiet ipsos custodes (who will watch the watchmen?)
lapeer20m is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ignition cut-off problems CostelloCrew Conversion General Discussions 4 11-06-2014 08:00 AM
Electronic Pickpocket timbuk Everything Else | General Skoolie Discussions 0 12-05-2010 11:17 AM
Electronic devices and winter temperatures. arfisher83 Everything Else | General Skoolie Discussions 3 10-01-2008 09:46 PM
Blue Bird Ignition Interlock paul iossi Conversion General Discussions 0 08-21-2007 12:51 AM
Electronic LED moving display Steve Conversion General Discussions 1 12-16-2003 10:40 AM

» Virginia Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:21 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.