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  1. #801
    Gompy's Avatar
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    RE: CDI gr8flyer55

    [youtube]http://www.youtube.com/watch?v=E258qUJlOdU[/youtube]
    CU, Rob
    http://www.electronics.gompy.net

  2. #802

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    RE: CDI gr8flyer55

    I see you got the hv supply working Rob. Nice work!
    Looked at the schematic, should be fine for ignition board too. Plenty of voltage on the charge capacitor, I saw 403 volts. Looks good.

    John

  3. #803
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    RE: CDI gr8flyer55

    On the new to make PCB I've only to add a diode to stop the HV-oscilator when spark.
    The HV-boad will also stop when the ignitioncapacitor is loaded to max Voltage.
    If the engine is not running, the current will be 0.01 Ampere.
    Maybe we need a littlebit more power, the coil I use now is very small.
    Oscilator run now at 50 usec, I hope it's enough time to load the capacitor full.
    Now I gone test the schematic to see if everything works like we wish.
    CU, Rob
    http://www.electronics.gompy.net

  4. #804
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    RE: CDI gr8flyer55

    John, both your email address are out of order.
    CU, Rob
    http://www.electronics.gompy.net

  5. #805

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    RE: CDI gr8flyer55


    ORIGINAL: Gompy

    John, both your email address are out of order.
    In that case....he cannot get email also !
    I never met a engine I did not like !

  6. #806

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    RE: CDI gr8flyer55

    I tried fixing it but it seems beyond what I can do. I'll try another email account.

    John

  7. #807

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    RE: CDI gr8flyer55

    I'm trying a new email.

    gr8flyer55@yahoo.com

  8. #808

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    RE: CDI gr8flyer55

    Hi John

    I finished the 4T curves.
    Link: docs.google.com/open
    I am wondering what is the best version.(A-B-C-D)
    Hall location:BTDC 30°-32°
    Thanks in advance test.
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    Regards nyemi.

  9. #809

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    RE: CDI gr8flyer55

    This looks like 2t curve... http://i.imgur.com/C2JkB.jpg   here is one for a 2t.    A 4 stroke ignition should have curve like this low rpm few degrees higher rpm more deegrees here is a example http://i.imgur.com/tvvsi.jpg  .

  10. #810
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    RE: CDI gr8flyer55

    Differend between 2 and 4 stroke curve
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    CU, Rob
    http://www.electronics.gompy.net

  11. #811

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    RE: CDI gr8flyer55

    I've had a timing light on my car engine (four stroke) and it certainly doesn't jump from a low degree advance (5)to a high degree (20) with a low increase in RPM as shown above.

    It will start at low degree and then advance in a linear fashion.

  12. #812

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    RE: CDI gr8flyer55

    It's only painted to show how it works in 4t the degree of advance are different on each engine but it should look like this (raising with rpm)

  13. #813
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    RE: CDI gr8flyer55

    Cars don't need easystart of 5 degree timing, this is only for us to start the engine easy.
    Cars have enough power out of the batterij and use a powerfull start engine to spin the engine around.
    Modelengine have also low pressure, so the petrol don't burn very easy as do by high pressure engine.
    BTW, race engines have a hole differend ignitioncurve then jigsaw / weedeaters have.
    Most of the people don't use a start engine but start the engine by hand, thats why we need easystart.
    CU, Rob
    http://www.electronics.gompy.net

  14. #814
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    RE: CDI gr8flyer55

    I think I have the overheated transistor solved.
    When testing a new flashlight the current will be sometimes very high.
    Lucky me, I don't have a HV-board with a transistor.
    With the scope it show me the SCR stay open.
    Why, the Voltage coming from the HV-board was to high for the SCR (400 Volt type).
    Changing the SCR to a 800 Volt type solved the problem, current stay low.
    The problem of high Voltage is also the misfiring of the CDI.
    The SCR opens if the Voltage of the HV-board will be to high and that can be any time.
    If you use a low Voltage SCR, change it to a high type, at least 800 Volt.
    For example BT151-800R
    CU, Rob
    http://www.electronics.gompy.net

  15. #815

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    RE: CDI gr8flyer55

    Nyemi, is your new fixed source code the same as the source code in jake's excel sheet so we can make new curves and copy & paste the 2 tables as we did before?
    I just tested your new fixed source code with the Led & switches fixed and it works beautifully!!
    Thanks again for fixing the software. I need to make a few new 2 stroke curves but it tested good on my engine with the stock curve in it. The LED is now nice and bright so we can use it for a timing light again. Tested both tables and kill switch and they work fine.
    I will test your 4stroke curves by the weekend. So far, I think the "C" curve will be the best but still have to test on my 4 stroke engine, too cold right now with snow coming today.

    I am drawing a schematic and parts list for the HV board we will be using. Similar to an RCexl HV board but a different size. Almost all the parts except for the transformer can be bought from either Mouser or Digikey and I'll provide the part numbers for the parts.
    Working on getting the transformers factory made and should have an answer back in a few days. The factory is close to where I live. I want to get them to make 50 at a time until I get orders from the forum users for kits. I do have the bare HV boards available already, etched and drilled, ready for parts.

    John

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    RE: CDI gr8flyer55

    Just a note here, John this is sounding good. Keep up the good work! Capt,n
    I never met a engine I did not like !

  17. #817

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    RE: CDI gr8flyer55

    Capt'n , kits will be available shortly to build the complete project. I have sent out a few with preprogrammed Pic chips on pre built timer boards. This project was one of the best ideas to ever be made available to modelers. You can get either an assembled and tested set of boards ready for your choice of connectors, or as a complete kit with all parts or just the bare boards ready for assembly. Tomorrow ill post the part number list and where to buy them or just drop me an email with your address and I can send whatever is required. We still need a sort of building tutorial though.
    Jake is working on part 2 of the project, picking up where this one left off. A new chip, new features, and only requiring a new timer board and some extra parts. I think it will be a fun to do addition to this project. Telemetry being added, basic sensors for temp and rpm and on the fly timing changes etc. for those with newer radios capable of using telemetry features, it will make using the features very basic and simple. We are approaching this technology cheaper than you can buy a ready made system, if you have some basic soldering experience.
    It's taking some time but good things come to those who wait!!

    John


  18. #818

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    RE: CDI gr8flyer55

    John, this is sounding even better. The kits would make for a good winter project with time to get things right! Good Idea too me. Thanks Capt,n
    I never met a engine I did not like !

  19. #819

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    RE: CDI gr8flyer55

    I forgot to ask, are the Syncro boards going to be available too? Thanks Capt,n
    I never met a engine I did not like !

  20. #820

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    RE: CDI gr8flyer55

    Yes, what you are calling the SyncroSpark boards are actually our timer boards. Everything will be available, in fact they can be used to upgrade the old non SyncroSpark fixed or mechanical timing linkage such as on the older original Brison 3.2 engines. Our timer will be a plugin upgrade between the hall sensor and the original ignition box like the old CH ignitions were. Deans connectors are standard on the upgrade to match the originals.


    John

  21. #821
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    RE: CDI gr8flyer55

    Nobody home so I try the forum.
    I redraw the schematics like they use to be after all the changes.
    Hope some one can take a look at it and confirm me they are right.

    Missing the winds of the transformer.
    Red are changes I don't know.

    Only if I get to confirm the schematics are OK I start to draw the PCB's.
    BTW, the PIC for this schematic / board will be the 12F683.

    Jack will you add the schematics to your site if they are OK ?



    Schematics removed
    It must be clear the schematics are not a copy from (name)
    CU, Rob
    http://www.electronics.gompy.net

  22. #822

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    RE: CDI gr8flyer55

    Rob, I will check both schematics. Been busy today fixing my crashed computer, and rebuilding my snow blower.
    I see some resistor values on the hv board that need to be updated. I will make the changes and email them to you. I did get your email thru Yahoo. I printed it out so I can compare to my working boards.
    The transformer windings are 400 secondary, #32 awg, 20 primary, #26 awg, and 10 feedback, #30 awg.
    You can experiment but that's what worked best.

    Now that my computer virus is gone, I hope to get back to work on this project!!

    John

  23. #823
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    RE: CDI gr8flyer55

    I add the winds.

    BTW, I add some componets to the timerboard to use it optimal.
    I don't know if both LEDs will be used, but if you don't use one of them don't place it.

    We start this week with hail, the rest of the week it rains.
    Monday I get a hearing if it's allowed to start to build a barn in the garden so I can test dry.
    CU, Rob
    http://www.electronics.gompy.net

  24. #824

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    RE: CDI gr8flyer55

    Well that schematic looks real good and I am sure will work...some way somehow it happens to be familiar with ...couple additions to it ...but should be OK.
    As far as Original Syncrospark timing boards I am sure that no one will be able to have. The closes one but not close it was a limited try of rcxel with a 16f pic. and only one program.
    The original SS had its unique features that no one will be able to duplicate them.
    Syncrospark was part of CH brand name to its timing board and not available anymore...
    I can still get them but for a real high price . Syncrospark had 4 curves preprogrammed and selectable via 3 pads.
    CH change the sycrospark name to computer timing control after the new TB V1 that was developed and programmed by a friend of Bill Carpenter , after that V2 was done with external OSC,VR...
    The TB currently used is a V1 and a LED added to it.

    So... no matter how good the software is, hardware... this will never be a Syncrospark and do not create confusions.

    Do not want to get anyone upset, I myself supported this project .

    "Sky is big enough and can hold many stars"

    Thanks
    Adrian
    www.ch-ignitions.com

  25. #825

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    RE: CDI gr8flyer55

    I cut & pasted this below. I hope all of you guys and all RC People can work together.

    Sometimes we wonder, 'What did I do to deserve this?' or 'Why did God have to do this to me?' Here is a wonderful explanation! A daughter is telling her Mother how everything is going wrong, she's failing algebra, her boyfriend broke up with her and her best friend is moving away.


    Meanwhile, her Mother is baking a cake and asks her daughter if she would like a snack, and the daughter says, 'Absolutely Mom, I love your cake.'
    'Here, have some cooking oil,' her Mother offers.
    'Yuck' says her daughter.

    'How about a couple raw eggs?' 'Gross, Mom!'
    'Would you like some flour then? Or maybe baking soda?'
    'Mom, those are all yucky!'


    To which the mother replies: ‘Yes, all those things seem bad all by themselves. But when they are put together in the right way, they make a wonderfully delicious cake!

    ‘God works the same way. Many times we wonder why He would let us go through such bad and difficult times. But God knows that when He puts these things all in His order, they always work for good! We just have to trust Him and, eventually, they will all make something wonderful!

    God is crazy about you. He sends you flowers every spring and a sunrise every morning. Whenever you want to talk, He'll listen. He can live anywhere in the universe, and He chose your heart.





    I never met a engine I did not like !


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