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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Conversions >> RE: CDI gr8flyer55
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RE: CDI gr8flyer55 - 10/7/2012 11:16 AM   
COM


 

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From: Ga, GA, USA
Status: offline 		Jake that is a nice little board. Its going to need a few more parts though. The reg. is pretty much needed as people will be using the ignitions above 5 volts. its already there so why not keep it.


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RE: CDI gr8flyer55 - 10/7/2012 11:54 AM   
Gompy



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From: Alkmaar, NETHERLANDS
Status: offline 		I've a question.......are all of our models so small there is no place for a normal PCB ?
This opensource DIY (Do It Yourself) project will be a BIY (Buy It Yourself) project.
Most people who fly petrol engines and big planes, are older people with working hands.
They can't make a SMD PCB, with some luck they can see the parts but not wat kind of part it is.
You need also special equipment for SMD, with a normal soldering iron you will burn the parts.
If you decided to use SMD, you must be deliver a (BIY) complete build CDI, no kit.
And now we are coming to the cost, make SMD PCB will be expencive - assembly the SMD to the PCB will be expencive - buy a complete SMD-CDI will be expencive.
Why people will buy a expencive CDI......they aren't waiting for a other expencive CDI.
They want to save money to build a CDI by them self, and learn to solder and electronics.
And most of all they are very happy if the CDI they have make by them self it is working.
Thats also why all of my projects are opensource, I like it if I can people make intrersted into electronics and modelbuilding.

Please if you want to make this project commercal, stop right now to devolpe it.
Build a new CDI with all the options you want to have, make a company by your own with all the people who help to devolpe the new CDI, and sell it the highest bidder.

I promise to make a PCB (opensource) but only for normal components, so everybody can build the CDI.

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http://www.electronics.gompy.net

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RE: CDI gr8flyer55 - 10/7/2012 12:20 PM   
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Status: offline 		Hi Rob,

I agree with you 100%. If its open source then it seems that all the stuff ie software, schematics, board layout is offered here free to anyone want to build there own. IF you start talking of commercial boards and SMD and kits then it is no longer a DIY project, but it starts competing with other commercial units. Then if kits are offered who will warranty and help the end user with any problems?

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RE: CDI gr8flyer55 - 10/7/2012 1:59 PM   
Gompy



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Status: offline 		You need a cheap / small / SMD timerboard with a lot of options ?
For only 12.97 $US you can have a very nice board ready to use.
https://www.olimex.com/Products/Duino/PIC32/

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RE: CDI gr8flyer55 - 10/7/2012 3:13 PM   
gr8flyer55


 

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Status: offline 		Rob, I worked around the led problem last night by using your stroboscope timing light on the sparkplug wire. It worked well on my test engine that does not have a braided-shielded sparkplug wire. Tried it on a shielded wire but couldn't get enough signal to trigger it reliably. I was thinking of a direct connect to the led output on the timer board as another small optional project to make it work. Is there a way to not use the antenna loop but hook directly to the stroboscope to get a positive reliable trigger signal?
If that can be done, there you have a perfect, small bright DIY timing light for this project!

I figured if we needed to go this route, using the now shorter pulse signal would be a good enough signal to drive it.

About a year ago, I made a very simple static timing light (engine not running) , to do initial ignitial engine timing setup. I also still use it today. It plugs inline on the hall sensor cable between the sensor and ignition so no external power source is needed. It uses the sensor signal to light a led when engine would normally have the plug fire but in fact steals the signal, and does not allow the ignition to actually fire, a sort of safety feature as a side benefit.
If you look back thru the other forum thread in the gallery, you will find the pictures along with the schematic for it, a very simple project built in a few minutes time.
Just some ideas I had last night, to solve the led brightness problem without altering a single thing in Jakes powerful programming. It is just a few work around ideas that are add-ons to the project. Think of them as DIY options for the best project presented in years for ignitions.

John


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RE: CDI gr8flyer55 - 10/7/2012 4:17 PM   
Gompy



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Status: offline 		John, I use this one http://www.electronics.gompy.net/strobelight/ by myself.
It's usable untill ~9,000 rpm by changing a capacitor.
I also use it with the sheelded cable of my bike without loosing pulses.
But I have to place the crocedilclip near the coil and not near the candle.
The clip will pickup the pulses from the coil and it looks a very good signal.

I also expirement with a xenontube from a disposal camera and connectected to the flash output of the PIC.
I note with daylight the LED-light is not enough to read the degree disk wel.
If you want optimize the LED-light fast, buy a cheap LED-flashlight with a good lens.

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RE: CDI gr8flyer55 - 10/7/2012 5:04 PM   
gr8flyer55


 

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Status: offline 		Rob, I too have experimented with different ways to connect it for a good strong positive signal. This is what I am trying to figure out. We need an interface connection to directly plug in for the signal, full strength to make it bright and reliable. A cheap led flashlight is a good light source which I have tried and it works perfectly.
I have many ways to do what need but involve complicated hookups. We just need a simple, easy to use, foolproof, system that anyone can have success with. A users tool, not an experimenters nightmare.
We could make it an accessory item. That is the add-on approach which will work.
One more item we need is the direct rpm readout to accurately check rpm with respect to timing. I have my own way of doing this with an optical tach pointed at the prop. Also had worked by pointing it at the timer's led and reading it, multiplying the reading by 2 (my tach is set for a 2 blade prop- 2 interuptions per revolution). This would be fine except now with the led on the board being so dim, doesn't work at all. Maybe using the RCExl inline tach is the solution there too. Just a thought.

John


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RE: CDI gr8flyer55 - 10/7/2012 7:17 PM   
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Status: offline 		So has anyone else had trouble getting the new code to compile?

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RE: CDI gr8flyer55 - 10/7/2012 7:22 PM   
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Status: offline 		Jake, I just posted a short video of a cold start but primed engine to test the newest 9.6 version software and one of my good curves. Seems to have no bad habits so far. Benefits are a one flip start, smooth idle, and good top rpms.
You wanted proof that it works on an engine, well here it is.




Take a look, hope the link works.

John


< Message edited by gr8flyer55 -- 10/7/2012 9:16 PM >

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RE: CDI gr8flyer55 - 10/7/2012 7:31 PM   
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Status: offline 		John that link is a bad link. I clicked and I get " Video is not available".

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RE: CDI gr8flyer55 - 10/7/2012 7:49 PM   
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Status: offline 		Working on replacing the link. Will edit it soon as I get the link to work!
Sorry.

John


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RE: CDI gr8flyer55 - 10/7/2012 8:03 PM   
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Status: offline 		Edited the link, was missing the data statement. Should now work!

John


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RE: CDI gr8flyer55 - 10/7/2012 8:39 PM   
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Status: offline 		Nope! still get the same error message.


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RE: CDI gr8flyer55 - 10/7/2012 9:12 PM   
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Status: offline 		Good catch Charlie. The copy code to clipboard macro was leaving a few lines off the end.

I swear I checked this, but somehow it must have gotten screwed up. I just fixed this and uploaded the fixed file to the website. No version change, but it should work now.

Anyone who downloaded the spreadsheet already should download a new copy or just remember that the copy code button leaves some lines off the end. The code is all there, but the macro just doesn't copy all of it.

Remember also that the copy code button does not put your curves into the code, it just copies the default code into the clipboard. You will have to copy curve 1 and 2 and paste them into the code. There's only two lines to change now, so I didn't want to have to mess with the macros every time there's a code change.


-Jake

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RE: CDI gr8flyer55 - 10/7/2012 9:14 PM  1 votes
CH Ignitions


 

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Here you go guys

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RE: CDI gr8flyer55 - 10/7/2012 9:25 PM   
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Status: offline 		Thanks Adrian !!
My Iphone is giving me alot of problems right now.. Need to do an upgrade in software today for it, till then, Adrian has helped me out once again.. Thank You !!

John

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RE: CDI gr8flyer55 - 10/7/2012 9:30 PM   
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It works if you use the "youtube" in brackets BB code.

Very awesome to see this vid! One flip cold start is amazing!

Makes me think of the last time I started my string trimmer. I pulled until my arm was sore then got pissed and finally started pulling it really fast, and it finally started.

-Jake

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RE: CDI gr8flyer55 - 10/7/2012 9:31 PM   
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It works if you use the "youtube" in brackets BB code.

Very awesome to see this vid! One flip cold start is amazing!

Makes me think of the last time I started my string trimmer. I pulled until my arm was sore then got pissed and finally started pulling it really fast, and it finally started.

-Jake

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RE: CDI gr8flyer55 - 10/7/2012 9:46 PM   
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Status: offline 		Thanks Jake,

Nice video John.

So Jake after the curve is changed One has to copy and paste the new curve values to the code? Thats fine. I was not sure of the tables updated automatically when the curves are changed.

Thanks for fixing the other problem.



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RE: CDI gr8flyer55 - 10/7/2012 10:02 PM   
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Status: offline 		Ok now that I can get it to compile I have another problem. It just sits there like a bump on a log. I get no sparky sparky from the ignition. When in the development board I also get no reaction from toggling the input pin. I am going to sim it in MPLAB and see whats going on.

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RE: CDI gr8flyer55 - 10/7/2012 10:07 PM   
gr8flyer55


 

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Status: offline 		Charlie, I just emailed my Excel sheet with my test 9 curves in it for him to post as a basic generic starting point.. Would you like a copy and the resulting hex file to try out?

John


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RE: CDI gr8flyer55 - 10/7/2012 10:07 PM   
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Status: offline 		OK I have it sorted. I have to pull GPIO.4 up to enable run mode.

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RE: CDI gr8flyer55 - 10/7/2012 10:11 PM   
gr8flyer55


 

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Status: offline 		So you are working with an edited source code eh? Shame on you Charlie!
My offer still stands for emailing you my Excel sheet and hex file if you want to try what worked in the video..

John


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RE: CDI gr8flyer55 - 10/7/2012 10:19 PM   
gr8flyer55


 

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Status: offline 		sent it anyway Charlie.. Check your hotmail !!

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RE: CDI gr8flyer55 - 10/7/2012 10:25 PM   
gr8flyer55


 

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Status: offline 		Rob,
What sparkplug size does your Aprilia use? 5/8 hex or 3/4 hex? I'm building another ignition for you to try..finished the whole ignition for your homelite engine complete with plug wire and a case..just like I sell. If you'd rather I left the sparkplug cap and boot off, I can do that also, but tell me the wire length you'll need..

John



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