Now that is great, first video on how it runs. Can any one get a video on a RC airplane engine?
thanks for shearing.

I don't know wat kind of power youre using, but I think you need some more capacitors and building your CDI into a metalcase.
Its possible spikes from the coil disturb the hallsensor or the timerboard.

Thank you !!
You show use the first CDI on a real working engine, GREAT !!!!

BTW, is't a 2 or a 4 stroke engine ?
If it's a 4 stroke, the table must be rotated, start at low degrees and in high rpm high degrees.
The table a see on your laptop must be use for a 2 stroke engine.

I use the scooters generator for supply, and it dont has a hall sensor, but a coil with a magnet for pickup.


It is a 2 stroke Minarelli machine, so the table is OK for it

It's the schematic from the website scooter CDI your using ?
I think if true, you need some more capacitors to eliminate small spikes from the scootergenerator.
It's also possible to use the batterie from the scooter, but then you have to change the power input.
You have to take out R11 and place the optional jumper.
But still it's possible you get little spikes who disturb the timerboard.
Don't forget the place the board into a metalcase and mounth it to ground.

BTW, to start making a real table you have to make the table flat.
If everthing runs OK, you can change the table little by little.
The table as it is, is to heavy and is not a realistic table.

Yes, its the scooter CDI schematic! Where to place more capacitors?
I use the batterie of the scooter, but it is hanged on the generator, so its the same

wil place it in a metal box at the weekend.

I tested with a constant 12degree, because i must place bigger main jet in the carburator if i want to use a bigger advance...

You have to place the capacitors into the powerline, in front and back of the voltage regulator.
More small ones (100nF and 100uF) are better then one big capacitor.
On the component layout you can see the capacitor right on the powerpins of the pic and this must be there.

Rob, did you ever test the HV schematic from the website with the 34063 dc-dc converter chips? I wanted to try the last schematic since I have the parts here to build it. I don't have a breadboard to test circuits so I'd have to make a pcb for it.


John

Hi John,

Yes I try it, but I don't having the hole schematic when I started.
If the Voltage control and Ignitionpulsblocker not into the schematic, you blow the IC.

BTW, this week or next week my provider is changing me from IP-server.
The problem, my mailserver will be offline for some time.
I will registrate a new domainname and look a round for a other serverplace to host my own servers.

In SppedDevices CDI they use PIC 16F84A and pin RB1 to control the DC/DC Converter:

Part of they C program:

#define pickup PIN_B0 //pin 6
#define thyristor PIN_A2 //pin 1
#define LED PIN_A4 //pin 3
#define curve_sel PIN_B2 //pin 8
#define inhibit PIN_B1 //pin 7
{
output_high(inhibit); //switch OFF DC/DC converter (if present)
output_high(LED); // led off
output_high(thyristor);
delay_us(scr_pulse);
output_low(thyristor);

delay_us(500); //this value is TBD (to be defined)
output_low(inhibit); //switch ON DC/DC converter (if present)}



Rob , which winding you used for transformator 4:50 is winding raport but how many in primary section ?

Thanks,
Dino

I was start to wind a coil with 16:450
16 x 0,5mm and 450 x 0.1mm
The Voltage was ~300 Volt, not bad but not enough.
I will try to get ~450 Volt, the sec winds, 16:600 ?

Hi all.
Very good site to calculate transformator.
http://schmidt-walter.eit.h-da.de/sm...mps_e.html#Spw

i have a homelight 43cc chainesaw motor that i am converting to cdi ignition. how hard is it to convert????

HI Rob! What about transformator?

I testing some, but I don't have found the right one yet.
With or without gap, more or less winds, thin or thick wire.....there are a lot of combinations [>:]

Its not hard. You will have to make some sort of hub to replace the flywheel.

Which CDI unit are you going to use?

John

i made a hub with the flywheele but it was the next size to small. any one need to trade???

Hi Rob..
I just got finished building the stroboscope with the 555 chip and it works perfectly! I used a high brightness LED from a small LED flashlight. It sure is bright! This was a worthwhile addition to the CDI project since you need a bright timing light to test the CDI on an engine anyway. Thanks for another great project that works!

John

Hi all,

Last week I try to move the websites to a other delecatedserver, but I've some trouble with the filemanagement.
It's possible you can't see all files / directories and I don't know why this happens at this moment.

For tomorrow I wish everyone a Happy Newyear and all the goods there is.

Happy New year to you as well Rob and all the best for the new year for you and your family.
...... Jeff

Happy New Year 2011 !

Dino'
Israel

Happy New Year!

HAPPY NEW YEAR EVERYONE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!

Happy new year everyone

and a lot of nice projects
i hope i can finish my engine and CDI will work on it:




Frank

PS:<span id="main" style="visibility: visible;"><span id="search" style="visibility: visible;">Cheerio Miss Sophie :P</span></span>

Wow Jimmy,

That is nice. Please keep us posted.


Happy New year to everyone!!!!