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 47 users online :: 5 registered, 0 hidden and 42 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Ignition system

All non-spudgun related discussion goes here such as projects, theories, serious questions, etc. All "off-topic" posts (aka useless posting, determined by moderators) will be removed.
Sponsored 
  • Author
    Message

Ignition system

Unread postAuthor: Mecke » Thu Apr 12, 2012 8:14 am

Hey!
I have been trying to build an ignition system with an ignition coil i buyed, But the problem is that i only get an small spark from it. And i have no clue why?
I attatched a picture that shows how i have been wiring it!
I use 12V as a power source and i have been trying with higher voltages but with no success :(
Do you guys know what im doing wrong?

And another question, how do you add prewievs on the post?
  • 0

Attachments
Namnlös.png
User avatar
Mecke
Private
Private
 
Posts: 18
Joined: Wed Aug 10, 2011 5:25 am
Reputation: 0

Unread postAuthor: Petitlu » Thu Apr 12, 2012 8:36 am

your diagram is not correct!
I just finished with an ignition coil is working well, here's the diagram:

Image
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: Mecke » Thu Apr 12, 2012 8:56 am

i dont get how the diode is wired, can you please explain? :P
  • 0

User avatar
Mecke
Private
Private
 
Posts: 18
Joined: Wed Aug 10, 2011 5:25 am
Reputation: 0

Unread postAuthor: Petitlu » Thu Apr 12, 2012 9:03 am

I did not have a diode so I have not placed ​​and it works well!
sorry for my english, I'm French
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: Mecke » Thu Apr 12, 2012 9:08 am

whats up with the capasitor and the transformators... i dont get it :(
  • 0

User avatar
Mecke
Private
Private
 
Posts: 18
Joined: Wed Aug 10, 2011 5:25 am
Reputation: 0

Unread postAuthor: Alster370 » Thu Apr 12, 2012 9:18 am

Correct me if im wrong but, to me it looks like the camera circuit is charged up by the 12v battery, which when the circuit is armed, discharges the cap and that is sent to the ignition coil which ramps up the voltage to deliver the spark.
  • 0

User avatar
Alster370
2nd Lieutenant
2nd Lieutenant
 
Posts: 243
Joined: Mon Feb 21, 2011 9:34 am
Reputation: 0

Unread postAuthor: Petitlu » Thu Apr 12, 2012 9:19 am

the capacitor is a circuit Single Use Camera
the diode is not connected to a transformer but on a car relay
Here is a link that may help you also:

http://www.spudfiles.com/forums/how-to- ... 23160.html
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Mecke » Thu Apr 12, 2012 9:23 am

Thanks, i think i get it now! :wink:
Dident se that it was an realay :)
  • 0

User avatar
Mecke
Private
Private
 
Posts: 18
Joined: Wed Aug 10, 2011 5:25 am
Reputation: 0

Unread postAuthor: Petitlu » Thu Apr 12, 2012 9:24 am

no, the flash has its own supply of 1.5v

EDIT : With pleasure! :D
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: dewey-1 » Thu Apr 12, 2012 2:31 pm

Petitlu wrote:I just finished with an ignition coil is working well, here's the diagram:


Happy to see you made use of that revised diagram I did for you.
The diode across the coil is just a good design practice on inductive loads.
It will make the contacts of low current switches last longer.
  • 0

User avatar
dewey-1
Major General
Major General
 
Posts: 1298
Joined: Wed Mar 28, 2007 10:24 am
Location: NE Wisconsin USA
Reputation: 0

Unread postAuthor: Petitlu » Thu Apr 12, 2012 2:37 pm

Thank you again for the diagram! :wink:
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: jimmy101 » Thu Apr 12, 2012 5:13 pm

Your basic circuit is OK, you are just missing one thing. You need a cap across your switch. That's how an automotive ignition circuit is setup and the cap is very important. IIRC, you need about an 0.1 MFD cap rated to tens of volts? Technician will probably chime in with the correct cap rating.

The circuit will throw a spark every time the switch is opened. If you want a simple oscillator type circuit you can replace the switch with a relay wired as a "buzz coil" (Google it). That setup will give you something like several hundred sparks per second.

The photoflash board circuit will work as well but really is a lot more complex than needed. The 12V battery + switch + automotive ignition coil + cap has been used literally trillions of times to ignite fuel air/mixtures. The big advantage of the photoflash board is that it'll operate from a AA battery for a fairly large number of sparks. The simpler coil/switch/cap setup takes a much beefer 12V power supply.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3129
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: Petitlu » Thu Apr 12, 2012 5:30 pm

In the diagrams dewey-1, the switch activates the relay so there is not much power ... I walk the control relay with disposable battery 12v ...
there is no switch on the high voltage.
the advantage of flash is the size
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: dewey-1 » Thu Apr 12, 2012 7:02 pm

The diode suppresses the inductive back emf which can be a higher voltage than the switches can handle. Think of a higher voltage arc.

See this explanation:
http://en.wikipedia.org/wiki/File:FlybackExample.GIF
  • 0

User avatar
dewey-1
Major General
Major General
 
Posts: 1298
Joined: Wed Mar 28, 2007 10:24 am
Location: NE Wisconsin USA
Reputation: 0

Unread postAuthor: Petitlu » Fri Apr 13, 2012 1:47 am

ok I understand
I put a 1N4007 diode (because I have no 1N4004) and the relay does not phase began with, so I removed ...
Some diagrams show a "spark gap", which he has used?
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Next

Return to Non-Spudgun Related Discussion

Who is online

Registered users: anello, Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'