GR, any nwes?

yes, it snows !

Hi Iura..
I did manage to replace one of the resonators with the new one with the 15pf capacitors inside and it did work. More on that result later. I also tried a 16mhz. crystal and 2 capacitors with the same results..still working good.
Since it is so cold outside, I hooked everything up to my test engine in the garage and did a startup and 1 minute run at all throttle positions. All good so far..the system seems to work fine now.

I am looking for some new ignition coils (smaller) for my planes. I tried a few Ionizer coils from air purification units that were trashed...most of them produced very weak spark but did run my engine. I found a local electric motor repair shop willing to try winding some very small ignition coils for me. I am making the bobbins from teflon and nylon, and they will wind the #36 gauge wire on them for me after I wind the 15 turns of #26 primary wire. The bobbins have 4 insulated sections.. The first test coil is working but they need to be potted in epoxy for better insulation between the sections.. This was due to the incorrect number of turns between the sections..if one has more turns than the others, it will try to arc between them..but it is progress..Their winding machine didn't have a counter on it..all done by rpm and time of rotations. Hope we get it right soon..wasting alot of wire on the tests!

The ignition and timer tests seemed to produce good results but my PIC chip sockets are getting worn out and aren't giving me solid contacts anymore..Wiggling the chip makes it quit etc.. So I am etching more boards to build...all good fun!

John

I got a very nice and small coil from Roy Sholl (cncengines.com)
The only problem will be the max rpm of, 10,000rpm

Rob, are those still available?

John

Hi John,

I have one of those. I wasn't too impressed with the spark. I can send it to you if you want it.

Charlie..
Have you looked at S&S machine's coils on their site? They have a coil for $15 that isn't potted.. I have been looking up every lead on finding out what they were originally used for and finally today I found it. I went to the Whirlpool gas range repair site and low & behold, there they are.. The stovetop electronic igniter boards use 4 of them.
All I have to do now is find one of them on the local dump and I'll have 4 good coils...for free. There's an appliance dealer close by here that may have some removal units I can pilfer thru and locate some also.. They work perfectly up to and a little beyond 10k rpm..perfect for our uses. In fact, the one I tested here was hooked to my dremel and peaked out at 12.5k before the spark quit..
They will fit inside an empty 35mm film container for potting after wiring for HV lead and power connections. Looks like a winner to me!

John

Hi Rob.
As I remember, this is a one kind of the photoflash HV transformer. It’s small, good, but I afraid that it well damage in a continues mode as a spark coil. Another problem will be a HV wire to sparkplug, the coil is without it.
HI Gr.
A few years ago I made spark coil from an old tvset flyback transformer. The energy was enough (~8100RPM), but I have big problem with insulation: firing on all metal around the coil and made problems for radio. Insulation of epoxy is not so good. So I get bike ignition coil and it works good.
Rob, this is first version of the CDI and my home made spark coil.
BR Iura.

Hi Iura,

I'll try to use pin9, 27kHz signal, for a HV-transformer.
I've to fnd out how I must wind the transformer.
In a lot of schematics I see they use this kind of electronics to wake up HV.
Big factory's of CDI's use it, so why don't we use this too ?

New version (1511) online, languages add, EN, NL, ES and FI.

HI Guys,
Here is a coil that I know it works at 22k, John this is the coil from that ...ignition module that you use to have.
For testings I can send one to you guys,Rob,John,Iura. What I did I ....killed one to see how is done. As you see in picture I tried to put as many details.
I run this coil on one of my engines with a testing CDI from a fried and it works. I tested with a generator and it fiers at 22k rpms, good spark.
The primary is .5mm wire and secondary is 0.05mm (guess AWG45)...so in 2mm dividing 2mm/0.05 is 40 widings per row. 2mmx 2mm (40x40=1600 widings) I measure the resitance and is 556ohms. Now if any one can find out the resistance per 1000 ft or....something we can find out the lenght of wire of this secondary.
This coil is conic and it has diffrent # of windings on the 4 ...compartments. Why is divided like that? Can this be one compartment?
The core is ferrite 7mm diameter and the winding is 12.5mm with .5mm wire that is 3 ohms. As you see in the picture it has ....25 widings, 2 of them are not visible, I cut them off to measure the diameter. I did not check to see how manyAmpsis using. I do have a Bob Shores book," Ignition Coils" that I will have to read about coils. It has couple of coils with description and how to do it. Now...I just look a litle trough the book and something catch my eye. This coil from the picture was used on 24V system and this primary is close to 24AWG . In this book it uses 28 AWG and 44 for secondary. One thing I see, those coils can be for 12,6,4.5V by using diffrent AWG on primary, all uses the same 44 for secondary and is 10000 or 12500 turns. I will have t read this book well to get the ideea.


Thanks
Adrian

The resistant of copper is 1,674 x10^-5 / meter.
Roy (or his son) sell this coils for 15$ http://www.cncengines.com/images/hvcoilsm.jpg
Why 4 chambers, the differens between the winds will be less into 4 chamber.
If you start left to wind and put 1000 winds in one row, you go back where you start with 1000 winds, and put 1000 Volt on this coil.
The differend between the first wind and teh last (2000) wind is 1000 Volt.
The isolation must be in this case at least 1mm between wind 1 and wind 2000 (if the wire wasn't isolate)
It's hard to explane if English isn't the first language.

Hi, we don't have help files for the CDI / TCI and need your help

It takes to much time for us to create help files for this free projects we made.
We hope some people can write this files for us.
We don't acpect profesional help files, some picturs with text to show how it works is more then enough.
Be in mind, you don't write the files for us but for all the people who want to build this project too.

Thanks !!

What kind of help files do we need?

How to build (with pictures ?), how to make the cable (with pictures ?), how to connect (with pictures ?), how to setup program (screenshots ?), How to mounth on the engine (with pictures ?).....anything you can thinking about it can be a problem for the future users.
Most users can read english and translate from english to a other language is the most easy way to doit I think.

Hi guys!
Today I built the timer module on a protoboard. It works like a charm, after some fix.

I had problems withe the communication, had to set the speed.
I discovered a small bug also:After, if i select the COM port more than once, than i get an error message.

I could program, read and monitor the PIC, tomorrow will try on the scooter, hope without problems

Cheers

Maybe we can notice it in the setup to set the portspeed to 38400

I discover also a bug, but in you.....you sellect the comport to much.
I don't understand, why do you sellect the comport more then ones ????????

Can you post a photo of this coil you talk about. Thanks Capt,n

Ok CaptainJohn..
I'll see if I have it..

John

John,

those coils work very well.

Gompy, it works on my scooter

I just made the timer board on a protoboard, and hooked it beetwen the pickup and the CDI, and it works also like this

I have one question, when is the LED lit up? because i saw it flashes when there is no pulse, it seemed like it self triggers?! It can be the problem for the rpm calculatio, and for the fake advance..

maybe it just because the protoboard, i will make it on a panel at the weekend.

Here is a video of the v12 mini engine that is on Youtube for a long time,now with ignition system.
All is done electronic, any idea how?

[youtube]http://www.youtube.com/watch?v=9yP42Cf06ic[/youtube]

Hi Adrian,

looking at the video it seems they hide a lot of the ignition system. Nice engine though.

Thats the new version we gone make, one HV-part and one timerboard with outputs as much as you like.
It's nothing more then one output following by 12 ohters on time.
If you know when the first cilinder needs a spark, the 11 others gething (1 rotation / 12= msec) later the spark.
Under the plasticcover he is hiding 12 little coils, 12 capacitors and 12 SCR's.

Hello Guys!

I tried on the scooter today, it works
Here is a video...but there is a problem, that i sad yesterday...somehow it recieves more than one pulse per revolution, and displays me 10.000 rpm where it is actually 5-6000...so i have to fix it somehow...maybe it can be the solution to make the reciever less sensible, but how?

But a big thank you for this fantastic project!!!

[youtube]http://www.youtube.com/watch?v=d7ldOr_nNoo[/youtube]