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  1. #1
    African-American
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    SpaceMan's Custom Gauge / Instrument Cluster

    Background my spare ski's display was dead-on-arrival.

    I removed the oem cluster and tried to repair it, but the electronics had basically dissolved into powdered salt....

    The only salvageable part was the wiring loom for it.

    Click image for larger version. 

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    I don't see the point in purchasing a replacement cluster and then a GPS module for it. So i decided I will build my own one. Using an arduino Leonardo + i2c 20x4 LCD.


  2. #2
    African-American
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    This is my early alpha. Pretty much how it will work and operate. It will have speed, altitude, time, compass/heading from the GPS.

    RPM from a custom built sensor
    Gas/Fuel and oil levels from the stock senders.

    I could take a speed reading from the speed sensor, but I figure gps is the way to go.

    The total Hours is stored in memory, so it survives power off

    Speeds are in KM/h.

  3. #3
    African-American
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    SpaceMan's Custom Gauge / Instrument Cluster

    When I got back from the electronics store with an expensive bag of components: GPS unit, data-logger (logging to sdcard... ), 3 axis accelerometer (g-meter .. )


    Click image for larger version. 

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  4. #4
    eb87's Avatar
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    That is awesome!

  5. #5
    African-American
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    As of now.

    The unit will monitor the Oil and Gas levels in realtime, and give a warning when they are less than 25%. These warnings will reset if the levels increase without needing to restart the ski.

    the GPS is updating speeds at 10Hz (10x a second).

    Added an Info center, changes between:
    heading (N|NNE|NE....),
    Distance traveled (calculated by gps current point to previous point 10seconds ago.)
    Trip Time (time since the ski has been on)
    Current Time from the GPS (corrected to my timezone).
    Notification if GPS looses its signal.
    Speed and RPM is smoothed by using a median average of 3 readings. (ie ommit the highest and lowest and take the middle reading)
    RPM value of 10 medians ( 30 readings ).

    Speed and distance of less than 1 Km/h and 0.1km are ignored. Dont need to log and process trailer time.

    Warnings: activate the warning led (clear becomes red, like the stock guage)
    They also beep and flash the display's backlight on/off every 10 seconds.

    Regarding RPM, i'm having an issue finding the correct cable I need to wrap around the spark plug lead.

    pics to follow.

  6. #6
    African-American
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    Test fitting how it will look, going to use an oem decal on a piece of plexiglass, the screen will be completely epoxied/siliconed to the rear of the plexiglass. So no water issues.

    The plexiglass will be mounted from the front to make maintenance easy(no removing of cowlings.

    Electronics will be housed in a little water tight container...

    I made a copy/xerox of the decal, cut it open. The red mark is where the led will go.

    Click image for larger version. 

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  7. #7
    Click avatar for tech links/info K447's Avatar
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    Have you tested the display for sunlight readability?

    Anti-reflective coating on the front plexiglass?

  8. #8
    African-American
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    The oem guage was LCD without a backlight. I have tested the display in direct sun and it works perfectly.

    These are LCD displays like a cheap digital watch, calculators and those old old old monochrome nokia's. So they are extremely visible. These are not LCD's like on smartphones and computers.

    I might make one for my other ski, but then Ill use a graphical OLED or a graphic E-Ink... But then Im going todo some amazing things. Like AFR, Fuel predictions, G-Force Meters, 0-60 + Lap Times, Mapping.

    Total cost of all the parts is around us$80

  9. #9
    African-American
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    Info and warning tests.


  10. #10
    Awesome job!! Following

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