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EHC replacement

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

  1. Axel

    Axel Member

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    Hi Eric,

    Thanks for the question. The internal high side switches, what i use in the in the EHC can handle up to 30 Ampere before they switch off. I test every EHC with more than 20 Ampere for 20 seconds with a 7 Ampere polyfuse. The starter solenoid need 18 Ampere. II have checked the current to the starter solenoid in my Ridgeback and in a few K9 and there is no need in my opinion to push the starter button longer than 20 seconds. I had tested several fuses last year until I decided for a 7 Ampere Polyfuse, what is fine in the potting compound, that works at heatsink material. I think, it is the balance between a good protection and a start without problems. However, the starter need more than 100 Ampere, but it is wired direct to the battery and not to the EHC. I hope you can follow my confused describtion ;-)

    Hi Sutton,

    Sorry for the late reply. I have finished an Air ride control with a memory function, what uses one half of the 2 big buttons at the left and right side of the BD handle bar. Curtis just got a device for testing an I wait for the test result. The installation is not complicated. You just need to cut 2 cables from the handle bar button units and connect it to the Air Ride Control and power it with 12 volt from the battery. You are be able with my system to change the Airride function at any time when you ride, unlike to the old EHC, what need to be setup before riding. Just feel free to contact Curtis for an update. I attach the manual.

    All the best!
    Axel
     

    Attached Files:

  2. Th3InfamousI

    Supporting Member

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    Thanks Axle, makes sense. Yes I was really asking about the solenoid, which you answered at 18amps!

    BTW air ride adjustment sounds cool! Thanks again for the work you put around this.

    Sent from my 2PS64 using Tapatalk
     
  3. Rottweiler

    Rottweiler Active Member
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    Yes Thanks again Axel
    Your Ehc has worked flawlessly on my bike.
    Todd
     
  4. PROFLYER

    PROFLYER SWOLE

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    Thanks Axel, I'll wait and see what @KaptinAmerika think of the unit. Also, with the factory air ride you can change it at anytime. Bike running or not you press the start button and then use the high/low beam switch to air it up or down. Mine leaks slightly so I have to add air from time to time on long rides and I can do it while riding.
     
  5. PROFLYER

    PROFLYER SWOLE

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    Yes. If I hit start (before run) when the bike isn't running I can operate the air ride before I even start the bike. I like to air it up before I get on so it's easier on the pump. Then I hit run/start to start it like normal. While riding I hit start and then H/L to change the air pressure. I don't have a pressure gauge, but you can tell how firm it is. Or I can let all the air out and ride it around on the bump stops that were installed as part of the kit like a ridgeback. Fender really hugs tight on the tire too when the air is out which looks cool. It raises up/down 4".
     
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  6. Axel

    Axel Member

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    Hi Sutton

    Sorry for the late reply. I was a bit in Holyday and had not looked in this forum for 3 weeks.

    Yes, I haven´t think what is happen if the air ride system leak a bit. In this case is my Air Ride control a bit useless, cause you´ll need to press the button to release the air before you can press the button and pump again to the required height.

    How long is the average time to pump up the system to the maximum height, when it was complete empty and how long are the deco valves usually open until the system is empty again? I know it might vary from system to system. It´s just to get an idea.

    All the best!
    Axel
     
  7. Cdogg2

    Cdogg2 New Member

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    [​IMG] ;) :D
     
  8. PROFLYER

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    No problem! And yes they do leak a bit. The fittings aren't the best. It holds air for a ride, but not for weeks on end. The factory EHC has the ability to change the air pressure at any time, so you can add air or let air out anytime the bike is on--running or not. If you're not able to program that same functionality, then a switch of some sort would be the better option.

    As far as how long, I'm not sure. It airs up from empty to a riding pressure in about 20-30 seconds. It lets the air out quickly, but that's simply because you just open the valve and the air rushes out. I can air it down from full in 2-3 seconds probably? A timer setting wouldn't be a solution though. It needs to be adjustable up/down at any time just like the factory EHC does.
     
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  9. Axel

    Axel Member

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    Hi Sutton,

    Thanks for the useful info. I have implement a normal toggle function in the "toy" as well, what allow to use it as normal "One button up/down relay". However, I don´t have the right idea right now how to make it a bit more comfortable with one or 2 buttons.

    I think, your suggestion, one button for "up" and one for "down" is the best and easiest solution. I´ll change it in the way what you suggested.

    It´s somehow a bit pitty for me, cause the implemented microcontroller could do more and as developer it´s hard to resist to program something (...in this case an absolute useless function)in the device ;-)

    All the best!
    Axel
     
  10. Axel

    Axel Member

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    Hi,

    Curtis suggested me to make an EHC for the 2003 and earlier models. However, it´s winter time and not the right weather for riding. I know, that the 2003 EHC is absolutely not a big business but I like the bikes, even when they use the bulky Harley style handle bar switches. So, I have looked to the schematics and have start with the project. The 2003 EHc is easier compare to the other EHC, cause some signals are just pass the connectors and don´t affect the control. The wiring of the older bikes is more traditional. Additional the connectors are much better compare to the computer con´s what were used at the newer EHC. I ordered some connectors from Mouser and started the layout. I hope to get the parts in the same housing, what I use for the other EHC. Here is the "first shot" of the layout without the solder paths yet:

    EHC03.png

    I don´t know if the space between the con´s is enough and will continue when I got the con´s delivered.
    My first questions are: Does somebody have a high res. pic of the original 2003 EHC? What kind of connector is the 8 pin J5? I have found only low res pics, where I can not identify the 8 pin. Thanks a lot in advance!

    All the best!
    Axel
     
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  11. BWG56

    BWG56 Guru

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    Great job Axel:old2:
     
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  12. Axel

    Axel Member

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    The first layout is ready. It was a bit tricky this time due to the size of the connectors. Does somebody know, if the position of con 5 (the straight 8 pin) what goes to the speedo will fit with the harness? Thanks a lot!

    EHC03.png

    All the best!
    Axel
     
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  13. Gmutoagrsv

    Gmutoagrsv Active Member

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    Lol. I’m not even 40 and I’m good at 55-60. Granted I did get off a Honda RC211 racebike.


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  14. Gmutoagrsv

    Gmutoagrsv Active Member

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    I just sent my ehc off to be tested by slick. I’m praying it’s bad. So if so. I’ll be in touch with you. What’s the turn around? It’s an 05 carb mastiff. I also heard you’re giving a warranty. Is that true?


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  15. Axel

    Axel Member

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    Hi Greg,

    Yes, of course you have warranty w/o any questions. What is the issue?

    All the best!
    Axel
     
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  16. Gmutoagrsv

    Gmutoagrsv Active Member

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  17. Axel

    Axel Member

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    Hi,

    I have finish a few of the first test boards. I just need to put a microcontroller on it and need to write the software, what is compare to the other EHC a bit like kids birthday, cause the box have not many functions. Here is a pic:

    DSCF2898.JPG

    However, I usually have a few issues on the first boards. I´ll keep ypu inform after I have put it in a 2003 bike and if there was no fire... ;-)

    All the best and a nice weekend!
    Axel
     
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  18. Todd W

    Todd W New Member

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  19. Todd W

    Todd W New Member

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    I am looking to replace an original EHC in 2003 chopper sue to headlight not working unless you tap EHC on top lol
    Who make the best, easiest , cheapest ???
     
  20. dentdude36

    dentdude36 Guru

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    Check with Axel
     

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