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View Poll Results: Whatís the most important thing to you?
Lowest possible cost 3 23.08%
Make it as small and light as possible 6 46.15%
Battery longevity is very important 3 23.08%
Highest power possible 3 23.08%
Highest RPM possible 2 15.38%
Only use through hole construction 2 15.38%
No winding of transformers 4 30.77%
Group buy of components including boards 0 0%
Group buy of boards only 1 7.69%
Iíd rather buy a kit with everything in it 0 0%
I want to buy a pre-built & pre-programmed system 0 0%
I only want to use a 4.8v Ni-MH battery 2 15.38%
I only want to use a 2S battery 1 7.69%
I only want to use a 3S battery 1 7.69%
I want to use a 4.8v battery to 3S battery 5 38.46%
I want to use only off the shelf parts from Digi-Key or Mouser 3 23.08%
I want the Timer board to be separate from the HV board 6 46.15%
I want a combination Timer & HV board 1 7.69%
I want all the options possible using jumpers 3 23.08%
I want a USB connection 2 15.38%
I want a serial connection (DB9) and Iíll use my own USB adapter 3 23.08%
I want a ICSP connection 3 23.08%
I want a premade parts list (BOM) at Digi-Key 2 15.38%
I want a premade project parts list (BOM) at Mouser 1 7.69%
I want 1 design and 1 design only 1 7.69%
I want optional designs to choose from and Ill make the boards myself 8 61.54%
Multiple Choice Poll. Voters: 13. You may not vote on this poll

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Old Dec 16, 2012, 12:23 AM
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Canada, MB, Winnipeg
Joined Nov 2011
331 Posts
Latest SpreadSheet Updates F1

Go to post #4 for lastest Excel Versions


The F1 on the end denotes Fix 1.


Gompy's version with latest fixes. "Pull-ups are turned off for the switches and the polarities are reversed CDI-2012_v1.0_B-F1.xlsm"
Pull-ups are turned off for the switches and the polarities are reversed CDI-2012_v1.0_B-F1.xlsm


Standard version with latest fixes: "CDI-2012_v1.0-F1.xlsm"
CDI-2012_v1.0-F1.xlsm


Explanation of fixes:
Version F1 Fixes.txt

I corrected all the errors I could find but, there maybe more. Also there are some changes I would like to make but, I will talk to Jake first.

If you find anymore errors please let me know and I'll get after them but, for now they are features not errors.

Ray
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Last edited by Nav_Aids; Jan 01, 2013 at 01:43 PM. Reason: Latest SpreadSheet Updates
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Old Dec 16, 2012, 03:28 AM
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Where did you make changes..?? Pin assignment table still says internal pull-ups, WPU register still has internal pull-up on pin 2 enabled, Options register bit 7 is still cleared meaning pull-ups are enabled.
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Old Dec 16, 2012, 05:24 AM
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Have fun.
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Old Dec 16, 2012, 06:52 AM
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Nav_Aids's Avatar
Canada, MB, Winnipeg
Joined Nov 2011
331 Posts
Quote:
Originally Posted by bluejets View Post
Where did you make changes..?? Pin assignment table still says internal pull-ups, WPU register still has internal pull-up on pin 2 enabled, Options register bit 7 is still cleared meaning pull-ups are enabled.
I didn't modify any of the settings, that's for you or Jake to do, I just fixed things that were wrong with the spreadsheets themselves.

Please read:
Revisions and Fixes Jan 1-2013.txt

Ray
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Last edited by Nav_Aids; Jan 01, 2013 at 01:44 PM. Reason: Spreadsheet updates
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Old Dec 16, 2012, 07:20 AM
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Canada, MB, Winnipeg
Joined Nov 2011
331 Posts
Spreadsheet Error

Quote:
Originally Posted by Gompy View Post
Timing still ****.
Gompy the only thing I could find wrong with that is when the allowed value for that cell is exceeded. I can get most of the RPM cells to do it but, not the timing cells. So I'm wondering if there might be something wrong on your end and what I mean is a setting in your Excel and not the spreadsheet.

The first cell is max allowed timing.
The second cell is min. allowed timing.
The third cell is max rpm showing error value
The fourth cell is min. rpm allowed.



Have you tried the latest version?
I don't know why your spreadsheet is doing what it is, it's got me beat right now.

Ray
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Old Dec 16, 2012, 08:40 AM
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Have fun.
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Old Dec 16, 2012, 08:55 AM
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Nav_Aids's Avatar
Canada, MB, Winnipeg
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Quote:
Originally Posted by Gompy View Post
You have to see it differend, why is the motor doing something else the spreadsheet shows.
I donot care the spreadsheet, I look to the engine results.
No one have test the software with a flashlight, all of you are thinking the software is OK.....NOT.
If the flahlight show me the ignitiontime moves, the egnitiontime is moving.
But, I show John befor, into the timerboard was a error and nobody have see it after two weeks !
Just wat I scribe befor, use the software with a straight line and only use twostroke engines.
I know what you are saying and I have seen your videos. Yesterday was a bad day for me, I was in and out all day. But today I'm going to be working on the test bench and I will hopefully see what you are seeing and then we can work it out. I wanted to make sure the Excel was not going to cause me problems. I know Jake is very busy with school exams right now so we will just have to work through it. I hope to post my results later today if my family will let me work on this.

"straight line and only use twostroke engines." got it.

Ray
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Old Dec 16, 2012, 09:11 AM
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Have fun.
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Old Dec 16, 2012, 01:34 PM
supreme being of leisure
ZAGNUT's Avatar
Tel Aviv, Israel
Joined Jul 2004
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Quote:
Originally Posted by gr8flyer55 View Post
Actually, here is a toroid that Bluejets wound while building one of my combination timer / ignition boards. It looks nicely wound and functioned fine for him.

John
the wire on that secondary looks way too thick for comfort!

i use 0.14mm (~35 AWG) just because i have a never ending spool of it....leaves a lot more room in the "hole"
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Old Dec 16, 2012, 04:28 PM
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Wire size is not determined by "how it looks".

This torroid design (calculated) has been built and proven to work over many years.
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Old Dec 16, 2012, 04:42 PM
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You're kidding....
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Old Dec 16, 2012, 05:40 PM
supreme being of leisure
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Tel Aviv, Israel
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Quote:
Originally Posted by bluejets View Post
Wire size is not determined by "how it looks".

This torroid design (calculated) has been built and proven to work over many years.
which design is that? to my eyes it can't be the one John has posted up a few times with the 7.2mm ID core and 400 turns of 34 or 36 guage wire.
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Old Dec 16, 2012, 07:39 PM
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The core in that picture is .5" O.D.
On mine I use #36 awg. 400 turns wound first, then the 15 turns primary, then the 6 turns feedback. True, been using those since 1980 with great success. The original construction article was reprinted in an issue of RCModeler magazine by Ken Collins. RCM Capacitive Discharge Ignition. I can post the reprint of part III if it would help. The board has undergone many configurations sine the original article was printed. Back in 1980, a friend of mine from Lockheed systems, Floyd Carter and I revised it to include a hall sensor trigger instead of the original points used on antique ignition model engines. From that point on after the addition of the sensor, I have used the same design to this day. I send out kits all the time for DIY kit builders.
I will post the data and pictures later as we get the timer board and accompanying software working together. That will make the project useable for many people with the ability to follow the directions, build the two boards, program the chip, and finally, use it for models.
I'm hoping it gets going soon, since we are stalled at the moment on the software changes.

John
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Old Dec 17, 2012, 12:42 AM
supreme being of leisure
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Tel Aviv, Israel
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John, that's the same ignition the one i use is based on, just commenting that the toroid you show of bluejet's seems to be using a much heavier wire for the secondary. i can't see it hurting anything other than just making it harder to wind.

and since the original cores listed in that article don't seem to exist anymore is there an equivalent part out there that is easy to get? with junk box cores it's always a crapshoot...spend a bunch of time winding and then test it to see if it works.
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Old Dec 17, 2012, 02:20 AM
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102 Posts
Torroid cores are still available as far as I know, RS or Farnell (Elements14 now)
maybe mouser has similar in the US.
I'll look up the part numbers and web location and post them back here later.
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