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Thread: Fighter style MFD for motorcycle

  1. #21
    FLAC Chairboy's Avatar
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    I forgot to mention that I'll also need to sample various data from the bike. Here's my preliminary list, along with how I plan to do it:

    1. Speed
    I want something that updates faster then GPS, so I'll either look for a digital pickup or build one using a hall sensor or something and then acquire the data with a basic stamp class microprocessor.

    2. Tachometer
    I'll see if there's a pre-existing tachometer interface on the distributor like in a car and try to recycle that, probably with some filter to prevent big voltage spikes. I'll use the basic stamp style processor to time this as well.

    3. Idiot lights
    This should be easy, I'll just run them through 7805 regulator so I have a 5v line that goes high on the microprocessor whenever the light is lit.

    4. Fuel gauge
    I'll probably want to attach a multimeter to the inputs to my fuel gauge and see if it's just a voltage increase or not, then figure out if I can read it w/ the microprocessor or if I need to do something special.

    By 'basic stamp class microprocessor' I mean either my BX-24 or OOPIC, a pair of programmable processors I use in my other projects. I would have a serial line between the processor and the computer and it would deliver the information continuosly on the state of the various displays.

  2. #22
    Maximum Bitrate eugenen's Avatar
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    the main think I would do is try to shrink it down some to fit in where the existing gauges are. What is the diameter of those three gauges?

  3. #23
    Maximum Bitrate eugenen's Avatar
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    How does the existing speedo work, mechanical or electric?
    For all the inputs (tach, indiacator lights) I'd use an opto isolator that way any noise/spikes that could get passed a 7805 wouldn't get through.

  4. #24
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    Use an 8" 4:3 and then mask off the sides to make it square and don't use the masked areas in your app. You could perhaps mount some low profile buttons over the masked area. Or if it is touchscreen use the left and right area to display on screen buttons and a square centre to display data...

  5. #25
    FLAC mbkowns's Avatar
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    waste of time on a bike i could see adding speakers to a helmet and getting a mp3 player but for anything else on a bike your main concern is the road....
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  6. #26
    FLAC Chairboy's Avatar
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    By that logic, putting a DVD player or computer in a car is a waste of time for the same reasons.

    If I do this, my plan is to have more instrumentation available then usual, logging of rides w/ GPS, built in HP, 0-60 and 1/4 mile calculators, moving maps display, etc.

  7. #27
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    i give you a single day before you have an off because youre too busy reading the screen

  8. #28
    Maximum Bitrate eugenen's Avatar
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    still no different than having a display in a car. He could easily say " I'll give you a day before looking at your car LCD causes you to rear end someone"

  9. #29
    Maximum Bitrate carpcnoobie's Avatar
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    I don't think anybody is trying to flame anybody. I like it when people think out of the box. I think all that is trying to be said (and for good reason) is that a bike requires a great deal more attention then a car. That doesn't mean these problems can't be overcome. But a bike is just a lot more dangerous then a car and a moments lack of attention can quickly lead to a fatal accident.

    I used to ride as well, and love riding. I can't wait to get back on a bike (all references to a bike mean 'motorcycle'). But I know you really have to be on your game all the time to operate a bike safely. I'm sure you might be able to operate other things while riding. Many of us have that talent. Perhaps you can also build an interface that requires very little to no interaction to function well. If so, great. I just think people are trying to point out the clear fact that if this is to be done, it REALLY needs to be thought thru carefully and operated carefully.

    A good example would be Honda Gold Wing riders. If you've ever seen one of these bikes, they have radio, air conditioning, intercom systems, CD players. Heck, they even have reverse. But to ride one of these bikes you really need to keep sharp about operating the bike and avoid the many distractions that this bike can have.

    OK, I hope I was diplomatic enough. I'll turn off my rant now. Good luck.
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  10. #30
    Maximum Bitrate eugenen's Avatar
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    I wasn't saying anyone was flaming. An LCD display on a bike or car can be equally as dangerous, either one you can loose control in an instant. The difference being loosing control on a bike you'll dump it and hurt yourself, in a car you could hit someone else.
    I had a cousin who lived near us and was driving his bosses Gold Wing. This thing was something like 2500cc with 4 carbs, the a/c radio, etc. It also had soft air shocks. My cuz was strong, he picked up the front of my fathers car once and dropped it with my father inside just to be funny. He opened up that bike on a steep hill and the soft shocks in the back end sunk way back and the torque pull was so bad he couldn't release the throttle and ended up flying up that steep mountain road at 120mph until he could pull himself forward and let off

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