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EHC replacement

Discussion in 'Technical' started by Axel, Jan 20, 2016.

  1. Todd W

    Todd W New Member

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    what about the external relay on the old board?? Did you make it an internal ??
    20180218_081017.jpg
     
  2. Axel

    Axel Member

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    Hi Todd,

    Wow, nice bike :) The pics have put a big smile in my face. I like the exhaust style. I still have the boring original exhaust at my bike. However I just paid some bucks to an airbrush guy and my wallet is a bit empty due to 65 hours, what the airbrush guy got paid. So, a better exhaust will follow in the next winter...

    The external relay is now an internal highside switch, what is a bit better for long term operation (if the test device will work...). So, there is no need for an external relay anymore.

    I also thank you for testing the EHC. It´s just a prototype and let´s see, what happen.

    All the best!
    Axel
     
    dentdude36 likes this.
  3. Todd W

    Todd W New Member

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    Great, I am glad to be the test rat :)
    I am a industrial maintenance tech for 30 years now and have a good understanding of electronics and will be somewhat knowlegable to anything you need help on for test purposes :) Again, excited to help out :)
     
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  4. Todd W

    Todd W New Member

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    Very Knowlegable and So helpful :)
     
  5. Axel

    Axel Member

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    Hi Kevin and Todd,

    Thanks for the flowers :) Here are a lot of great persons in this community, who are helpful with their infos and suggestions. I got many good infos about BDM bikes, when I started with the EHC project. I have to thank you all !!!

    About knowlegable: it´s still a prototype and I hope that your bike will not burn down, while tesing the EHC ;-)

    ...and beside of it I love these bikes :)

    All the best!
    Axel
     
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  6. Gmutoagrsv

    Gmutoagrsv Active Member

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    Crap. Not you have me wondering. I’ll have to check again.
    lol. It is a 06. My mistake. I don’t even know what I’m saying anymore.
     
  7. Axel

    Axel Member

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    Sorry guys for the late reply. I was the last 2 months busy with production and service, cause everybody here wanted to bring his bike on the road after the winter and I was hanging in my workshop and had assembled and tested electronicboxes and other toys and had absolutely no time for internet.

    However, the EHC03 is ready. I had sended one of the first samples to Curtis almost 2 months ago and I got the response, that the box works fine. I have finish a tester and 25 EHC03 boards last week and will pot and test a few 03 EHC within the next days. Here is a pic of the tester and one of the boards:

    EHC03 Tester.jpg
    However, I had "build in" 4 mistakes in the board layout of the tester, when I made the pcb layout. This had cost me a few hours to find out the issues and solve it. Sometimes it is not the computer, what ist stupid. It´s the guy in front of the keyboard :-/

    By the way, when I talk about stupid: I got airbrush on my bike within the winter. 3 weeks ago I assembled the parts together and had put the seat on the bike. This was the result :-(

    bd.jpg

    I have decided to cut my seat after I recovered from the shock and brought it to a leather guy, who have covered it new. Now is everything "under control" and my seat is much smaller, more flat and in a friendly looking black leather :) I had ride 250 km last weekend and there was no need to recover from it :)

    I come back with the next infos, when I have finish some 03 EHC.

    All the best!
    Axel
     
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  8. Hirter6Pack

    Hirter6Pack Not Quite A Guru

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    Great job on the 03s Axel.
    As for the airbrushing,some might say she is the perfect woman just as it is.:)
    Keep up the good work :old2:
     
  9. Todd W

    Todd W New Member

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    That is Great news and we appreciate all the hours you put into this. Can' wait to try one out :) Awesome Airbrushing job as well :) Rode today in 50degree weather Indiana and had a blast :)
     
  10. No H2O

    No H2O Member

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    omg I grew up 3 hours away from you in Coesfeld
     
  11. Axel

    Axel Member

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    Hi Rick,
    Hahaha, Yes, you are right in many cases :) :) :)

    Hi Tommy,
    Yes, this is not ver far from my place. Have fun :)

    Hi Todd,
    Yes, I also looking foreward to get the first devices out for test it on the road. A workshop or a bike in the workshop are not the real life. but I have a good feeling. Let´s see...

    All the best!
    Axel
     
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  12. Todd W

    Todd W New Member

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    Axel, My one question is where is the headlight relay on your board ?? I dont see it. There is no compression relief on the 03 so it really isn' needed, did you bypass this internally ??
     
  13. Axel

    Axel Member

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    Hi Todd,

    Thanks for the comment. Yes, I have put a 2 channel high side switch on the board, what replaces the "traditional" bulky relay. I believe, this a bit more modern compare to the old mechanical relay, what can (and will...) make trouble after a time. I think the time for mechanical relays in a bike should be a matter of past.

    About the compression relieve valves: You are right. There is no need for taking care of decompression valves.

    Big Dog had use an extra "start module" in the 2003, what take care for driving the starter solenoid and the ignition. I haven´t see it yet, but I think it contains just 1- 2 relays and maximum 3-4 additional parts. My EHC 03 just drive the starter module with 12 Volt. I have implemented a 20 Ampere high side swtch just in case. This high side switch can drive the starter solenoid direct without the starter module. So, there is basically no need for the starter / ignitiojn module if the ignition switch can handle the current for the rest of the bike but I haven´t the opportunity to try it out in a bike yet. I think, it´s a good opportunity to test it. Here is the 2003 schema, where you can see the starter module as well:
    2003_EHC_1.JPG
    Does anybody had open a starter module already and have checked what is inside? What is the maximum rated current of the 2003 ignitiojn switch?

    Alll the best!
    Axel
     

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