Igniter

[maddmaxx]

I picked up a dynajet from a guy at work. I need a way to fire the spark plug. Is there a schematic for an Igniter around?

[mk]

You could search via the file list or just look at the "tools and construction forum".

[Jim Berquist]

Hello Fellow Electonic's type .........

You should be ashamed of your self....

You can do this the hard way by building a Capasitive Discharge Ingnition system from a 555 chip and push pull transitors being run through a automotive ignition coil.....

OR

You can You can Go to Radio Shack and obtain a 12v...DC machanical buzzer and run it though a 8 ohm audio transformer backwards...in series... Trust Me it will Spark.........you will need two wires...ground to engine and spark plug.....You can use a junk box automotive coil....


To test set up Touch to Big Toe.....

[Dang911]

I take no credit for this design. I built it, IT WORKS, ITS GREAT!!! Not to complicated. This was designed by "Steve". View the original post here http://www.pulse-jets.com/phpbb2/viewto ... d+ignition

Here is a list of parts you need to build it:

Some PC breadboard

capacitors
2 100nF (0.1uf)
1 220nF (0.22uf)
1 polar 47uF
1 0.22uF - points ignition coil condenser

fuse
5 amp with mounts

resistors
2 10k
2 10R
1 100R

Transistors
1 bc548
1 bc557
1 irf630 mosfet or A40N25

Diode
in4004

IC Timer
1 ic555 with socket mount (ne555p)

12 Volt Ignition Coil 30,000+ volts

[El-Kablooey]

You can You can Go to Radio Shack and obtain a 12v...DC machanical buzzer and run it though a 8 ohm audio transformer backwards...in series... Trust Me it will Spark.........you will need two wires...ground to engine and spark plug.....You can use a junk box automotive coil....


To test set up Touch to Big Toe.....

This is the way to go if you ask me. You can also just use a relay, wired si it will buzz, and a capacitor between it's + & - contacts. Use a large 12v relay.


I l;ike electronics too, and have built plenty of various circuits over the past 15 years. The solid state circuits can be tempermental for applications like these because of high-voltage back emf spikes and other issues. Remember all you need something to switch your coil on and off very quickly. This can be done any number of ways with electric motor's buzzers, relays, or electric bells, or even made foolproof by using an old fishing reel to create a hand-cranked switch. Just use your imagination.

[Eric]

If you just want to fire it up, you could take a small propane or butane torch and heat the combustion chamber cone section until its nice and red and then give it some starting air.

When the fuel vapor hits the metal you get instant ignition.

Plus you dont have to pop and bang around for a few minutes waiting for the engine to warm up when its cold out.

Eric

[larry cottrill]

... OR, you could just get yourself a Model T Ford spark coil - a design that has been basically unchanged and has worked perfectly for about 90 years.

I have two of them, originals dating from the 1920s. Both have always been run from 12V power (both AC and DC) and they still work perfectly - even though they were designed for a 6V system. They are as simple as dirt. The only maintenance that's ever needed is to smooth out the points every couple of years or so with a point file.

L Cottrill

[Mark]

http://www.vintageford.com/sect_search. ... y=Ingition
http://www.oldmarineengine.com/technica ... n_box.html
http://www.old-engine.com/magbuz.htm

[Mark]

http://cgi.ebay.com/High-Voltage-Induct ... dZViewItem
http://chem.ch.huji.ac.il/~eugeniik/ins ... _coils.htm

[MJD]

Or purchase an automotive neon running light power supply - West Coast Custom Design LLC is one source at wccdusa.com - their unit called the Boss provides 7500v output, which will work just fine. Input 12VDC. It's a small potted box assembly, about 2x3x1-1/2" with two HT leads on the output and a fused pair of wires for input. Don't reverse input polarity, you'll pop the fuse.

MJD

[Dang911]

YEA AND I BET IT DOESN'T COST $8.00 HEHE. My guess is it would be atleast $30.

[Mark]

I wonder how many milliamps a typical car spark plug has jumping across it? I noticed on my new SUV it has a COP, (coil on plug), for every spark plug, instead of one big coil that runs all the plugs. It also has VCM, variable cylinder management, shutting off half the cylinders to save gas when you get up to speed.
Mark

[Mark]

Or purchase an automotive neon running light power supply - West Coast Custom Design LLC is one source at wccdusa.com - their unit called the Boss provides 7500v output, which will work just fine. Input 12VDC. It's a small potted box assembly, about 2x3x1-1/2" with two HT leads on the output and a fused pair of wires for input. Don't reverse input polarity, you'll pop the fuse.

MJD

The link. I would opt for the blaster, it is 10mA less and only draws 1.8 amps. Does anyone know the lethal limit for electricity or how many milliamps a typical sparkplug uses? I have an EMCO 10,000 volt device and it produces only 0.2 milliamps, but this seems like plenty of spark to me, about a half inch spark. Still this device running on a small nine volt battery gets hot on one side so I don't think it is too good for a use where you would be needing constant spark for several minutes. It's not made to run at that level constantly I don't think. Those neon devices look nice but ideally, I would want something a bit less zappy.
Mark
http://www.homestead.com/prosites-llcwc ... TRANS.html
http://www.emcohighvoltage.com/ I have the E 101 series.
http://library.thinkquest.org/C0121286/safety.htm

[Dang911]

6-7 milliamps directly across the heart is lethal.

[Mark]

How many milliamps will melt a sparkplug electrode?
Mark