555 timer help

[Bob1001]

I am new to this newsgroup, I am typically a poster on rec. pyro or
metalworking, but I have been working on a new project. I am trying
to
make an ignition coil for my new turbing engine, and I am quite
terrible at reading electronic designs. I know that I will be needing
a 555 timer, and an ignition coil. The input into the coil should be
12 volts. I have built a neef type vibrator switch, which made quite
a
nice spark when used as a relay to put the 12 volts into the ignition
coil. But it was very unreliable, and I believe that a 555 timer
should be the best route to go, but I am quite new to electronics and
have become lost with all the complicated 555 timer circuits shown
online. I just need something simple that will trigger a pulse of 12
volts to the ignition coil.

Can aybody help me out?


Thank you,
Bob

 

[Stuart]

See the current issue of Nuts & Volts magazine. Stuart.

"Bob1001" <quadrunnerkid@comcast.net> wrote in message
news:7efc9060-4276-4ce8-b32e-080c944f1c6b@o42g2000hsc.googlegroups.com...

I am new to this newsgroup, I am typically a poster on rec. pyro or
metalworking, but I have been working on a new project. I am trying
to
make an ignition coil for my new turbing engine, and I am quite
terrible at reading electronic designs. I know that I will be needing
a 555 timer, and an ignition coil. The input into the coil should be
12 volts. I have built a neef type vibrator switch, which made quite
a
nice spark when used as a relay to put the 12 volts into the ignition
coil. But it was very unreliable, and I believe that a 555 timer
should be the best route to go, but I am quite new to electronics and
have become lost with all the complicated 555 timer circuits shown
online. I just need something simple that will trigger a pulse of 12
volts to the ignition coil.

Can aybody help me out?


Thank you,
Bob

 

[PhattyMo]

Bob1001 wrote:

I am new to this newsgroup, I am typically a poster on rec. pyro or
metalworking, but I have been working on a new project. I am trying
to
make an ignition coil for my new turbing engine, and I am quite
terrible at reading electronic designs. I know that I will be needing
a 555 timer, and an ignition coil. The input into the coil should be
12 volts. I have built a neef type vibrator switch, which made quite
a
nice spark when used as a relay to put the 12 volts into the ignition
coil. But it was very unreliable, and I believe that a 555 timer
should be the best route to go, but I am quite new to electronics and
have become lost with all the complicated 555 timer circuits shown
online. I just need something simple that will trigger a pulse of 12
volts to the ignition coil.

Can aybody help me out?


Thank you,
Bob

I've used this for various Ign. coil experiments..
http://www.users.qwest.net/~ptaylor/Electronics/zapomatic.bmp

 

On Dec 3, 7:57 am, Bob1001 <quadrunner...@comcast.net> wrote:

I am new to this newsgroup, I am typically a poster on rec. pyro or
metalworking, but I have been working on a new project. I am trying
to
make an ignition coil for my new turbing engine, and I am quite
terrible at reading electronic designs. I know that I will be needing
a 555 timer, and an ignition coil. The input into the coil should be
12 volts. I have built a neef type vibrator switch, which made quite
a
nice spark when used as a relay to put the 12 volts into the ignition
coil. But it was very unreliable, and I believe that a 555 timer
should be the best route to go, but I am quite new to electronics and
have become lost with all the complicated 555 timer circuits shown
online. I just need something simple that will trigger a pulse of 12
volts to the ignition coil.

Can aybody help me out?

Thank you,
Bob

I can help you in designing the 555 timer ckt. Please mention about
the duration or frequency of the output pulse you want to give to the
ignition coil. If you want the ckt diagram please mail me to
a4bc@rediffmail.com.

 

[gearhead]

On Dec 2, 8:48 pm, PhattyMo <Phatt...@nospam.gmail> wrote:

Bob1001 wrote:
I am new to this newsgroup, I am typically a poster on rec. pyro or
metalworking, but I have been working on a new project. I am trying
to
make an ignition coil for my new turbing engine, and I am quite
terrible at reading electronic designs. I know that I will be needing
a 555 timer, and an ignition coil. The input into the coil should be
12 volts. I have built a neef type vibrator switch, which made quite
a
nice spark when used as a relay to put the 12 volts into the ignition
coil. But it was very unreliable, and I believe that a 555 timer
should be the best route to go, but I am quite new to electronics and
have become lost with all the complicated 555 timer circuits shown
online. I just need something simple that will trigger a pulse of 12
volts to the ignition coil.

Can aybody help me out?

Thank you,
Bob

I've used this for various Ign. coil experiments..http://www.users.qwest.net/~ptaylor/Electronics/zapomatic.bmp- Hide quoted text -

- Show quoted text -

2N3055 not very good for this. Rated what, 60 volts? Coil flyback
voltage likely a couple hundred volts.
Use a high voltage transistor, better yet a mosfet or IGBT. You can
get a coil driver IGBT designed expressly for use with automotive
ignition coils, rated 350 or 400 volts. One example:
http://www.onsemi.com/pub/Collateral/MGP15N40CL-D.PDF
You can find others by using Digikey's parametric search. Go to the

--site map
--parts search
--discretes
--insulated gate bipolar transistors

narrow the parameters down to

--voltage between 350 to 410 volts
--current less than about 25 or 30 amps

you will get a few dozen IGBT's to look at, quite manageable.

A coil driver IGBT costs a buck or two and will last forever in this
punishing application. It's also much easier to drive than a bipolar
transistor.

I've built a few custom ignitions and sold them to some motorcycle
enthusiasts that wanted to upgrade their old points systems. I used
the coil driver IGBT's because I know they will work; they are
installed cars out on the road now and have done service for millions
of miles with minuscule failure rate. Don't botch things by using a
2N3055.

The original post has a glaring omission: What timing do you require
of the spark? We can advise you about the circuit but we need more
information.