RE: CDI gr8flyer55
 

John,
I changed the curve by changing values in the table between 1600 rpm and 7500 rpm. With the values I put in, this resulted in the curve changing to a dead straight line between the 2 points. If it works i.e. changes the delays like I think it should, I give you a rundown on how to do it.
Doesn't work by trying to drag the curve as far as I am aware.
Transistor, I did not use 2N4401, I think maybe BC547 so that might be why I showed it a-about. I thought I checked that..mmm.ok
Either way, I did have it connected the right way but i will change it to show your transistor.
Ok..cheers...Jeff

RE: CDI gr8flyer55
 

Re-transistor...yes, just checked, used BC547 so thats why in the pic of my board, Q2 has flat the other way. Connections are correct though.

RE: CDI gr8flyer55
 

That's what I figured you did Jeff, made a substitution and it worked for you. Overlay looked excellent!
Is it ok to post the files after I convert to PDF format?
I believe everything else is correct in all the other files. Let me know when you have the edit sequences perfected for the curves. I'll test that here on my plane to make sure it'll give the performance figures I am expecting in idle, transition and top rpms. My test engine (a 25cc weedeater engine) reflects changes pretty well when testing.

John

RE: CDI gr8flyer55
 

Yes, I think a few might be wanting to see your successful project.

Cheers...Jeff

RE: CDI gr8flyer55
 

hi john thanks for share. i want to make your cdi. can you sent me files?.i have asp .61 two stroke glow engine and i want to conversion gasoline.</p>

</p>

best regards...</p>

</p>

kemal</p>

RE: CDI gr8flyer55
 

I will try to post files here. Been having alot of trouble lately even logging onto RCU. The software will be posted first, then the PDF etch files etc.

John

RE: CDI gr8flyer55
 

This is the ASM file for the 12F683 chip on the timer board.

RE: CDI gr8flyer55
 

Here's the HEX file for the 12F683 chip on the timer board.

John

RE: CDI gr8flyer55
 

<span lang="en" class="short_text" id="result_box"><span class="hps">Hi</span> </span>ustura_kemal <span lang="en" class="short_text" id="result_box">
<span class="hps">I give</span> <span class="hps">the full</span> <span class="hps">file</span><span>.</span> <span class="hps">link:<a href="http://www.moto.com.ua/postphoto/archive/1090217_1.zip" target="_blank">http://www.moto.com.ua/postphoto/archive/1090217_1.zip
</a>
</span></span><span lang="en" class="short_text" id="result_box"><span class="hps">End of project</span><span>.

</span></span><div id="clear" style="-moz-user-select: none; right: 0pt;" class="clear-button goog-toolbar-button" data-tooltip="Sz&ouml;veg t&ouml;rl&eacute;se" data-tooltip-align="t,c" role="button" tabindex="0"></div><div style="display: none;" class="gt-spell-correct-message gt-spell-vkeyboard-on" id="spelling-correction">Forr&aacute;snyelv: <a>cseh</a></div><div id="gt-src-tools"><div id="gt-src-tools-l"><div id="gt-src-keyboard" style="-moz-user-select: none;" class="trans-keyboard-button goog-toolbar-button" data-tooltip="Virtu&aacute;lis billentyűzet" data-tooltip-align="t,c" role="button" tabindex="0"></div><div style="display: none;" id="inputt13n"><span dir="ltr" id="t13ntext" data-tooltip="P&eacute;lda: G&eacute;pelje be, hogy &amp;quot;privet&amp;quot;, majd &uuml;sse le a sz&oacute;k&ouml;zt, &eacute;s a k&ouml;vetkezőt kapja: &amp;quot;привет&amp;quot;." data-tooltip-align="t,c"><label id="t13nimg.lbl">Fonetikus &iacute;r&aacute;s enged&eacute;lyez&eacute;se</label></span></div></div><div id="gt-src-tools-r"><div id="gt-src-listen" style="-moz-user-select: none;" class="trans-listen-button goog-toolbar-button" data-tooltip="Meghallgat&aacute;s" data-tooltip-align="t,c" role="button" tabindex="0"></div><div id="gt-src-roman" style="-moz-user-select: none; display: none;" class="trans-roman-button goog-toolbar-button" data-tooltip="Olvas&aacute;s fonetikusan" data-tooltip-align="t,c" role="button"></div></div></div><div id="select_document" style="display: none;">&Iacute;rjon be sz&ouml;veget, adjon meg webhelyc&iacute;met vagy ford&iacute;tson le egy dokumentumot.</div><div style="display: none;" class="file" id="file_div"><div id="select_text" style="display: none;">M&eacute;gse</div><input type="file" size="40" id="file" name="file" style="display: none;" /></div>

RE: CDI gr8flyer55
 

thank you for helping john and nyemi.John do you have combo board pcb and schematics?

RE: CDI gr8flyer55
 

Hello Ustura...
I do have the schematics for the boards, and I will post today if RCU doesn't give me any more trouble uploading files. I just have to convert them to a format it will accept here. I have a parts overlay picture that I will try uploading first, then the etch file for the combo board, and a parts list. Nyemi has made available the software files for the ignition. Thankyou Nyemi !!!
Without his help, this project would have not been possible. He has done an amazing job over the last 2 years with the software design and constant updates. If there are any questions on the software, direct them to Nyemi. He has been very helpful to everyone needing help with the advance curves.

John

RE: CDI gr8flyer55
 

Here's the final combo board schematic from Bluejets.. I think he did a great job in this arrangement.

RE: CDI gr8flyer55
 

Here are the last 2 PDF files of the parts overlay and the board etch pattern.

Enjoy!

John

RE: CDI gr8flyer55
 

Ustura,
The coil for the hv was described somewhere before but hard to find I think so I will re-post details.
The ferrite toroid John used was ... Ferroxcube 768T188/3E2A
The size is .................................. 12.7mm(0.5”OD) x 7.2mm(0.285”ID) x 4.8mm(0.19”H)

I used one from Farnell here in Aus. and the part number is TN13/7.5/5-3C90
Web site here......... http://au.element14.com/ferroxcube/t...N13/7.5/5-3c90

Windings are of course enamelled copper wire.
L1 = 15 turns 26 gauge (#26)
L2 = 6 turns 36 gauge (#36)
L3 = 400 turns 36 gauge (#36)
Keep the start of windings L1 and L2 marked because the orientation of these two windings are important to the operation of the oscillator.
John used a "stick" with the wire wrapped to do his winding of the toroid and although a bit painful at times, it does work well.
If I remember, the "stick" was fairly narrow with a notch cut each end to hold the wire, and it was about 150mm long. You will have to work out how much wire for the 400 turns as it depends on your toroid core dimensions.
Jeff

RE: CDI gr8flyer55
 

thank you jeff. this board does not work.very warm mje 3055 why?<span lang="en" class="short_text" id="result_box"><span class="hps">

kemal
</span></span>

RE: CDI gr8flyer55
 

If you swap one of the primary windings end for end, should work ok. (i.e. swap start and finish of winding L1)

This is assuming you have no shorts or damage to windings. If you look closely at the layout diagram that John supplied and you have wound the coils all in the same direction, you will see the start and finish of each of the primary winding positions are marked.

RE: CDI gr8flyer55
 

This may show the layout a bit clearer.
If you click on the pic and download it, then open with windows picture and fax viewer, you can magnify the drawing.

RE: CDI gr8flyer55
 

A bit clearer again.........

RE: CDI gr8flyer55
 

thank you for reply jeff.c4,c6,c7 ceramic?

RE: CDI gr8flyer55
 

C4 can be ceramic, c6 and c7 are polarized electrolytic.

John

RE: CDI gr8flyer55
 

ı use bd911 instead mje3055 this right?

RE: CDI gr8flyer55
 

BD911 has slightly higher ratings so should be fine.

RE: CDI gr8flyer55
 

thank you for reply.hv board now working but timer board not working.i 'm using pic12f675 and bipolar hall sensor .it is for work need to make changes to program?<div><div></div></div>

RE: CDI gr8flyer55
 

The system works with the parts listed.
The program was written for 12F683 chip.
If you want to experiment with other types, then you will have to work it out for yourself.
The hall sensor I used was Allegro uA3240 .....unipolar.... not made anymore but I think A1120 is a replacement.
The last thing you want is a hall effect that "latches". The program looks for (I believe) the trailing edge pulse as the magnet passes.

http://www.allegromicro.com/Products...120-1-2-5.aspx

RE: CDI gr8flyer55
 

I just did a quick search and found this......

http://www.rcgroups.com/forums/showthread.php?t=288678

I would say by the look of this the 12F675 is nowhere near compatible.