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  1. #1
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    Arduino Based Boost Gauge

    Currently I think I have a boost problem so was looking around for a boost gauge to plumb in but couldn't settle on one I liked. So my thought train moved onto making a small LED one using an LM3914 bargraph kit but the kit/chip is limited in its options. I had evolved the idea into something more complex with a vacuum and boost display.

    I remembered I bought an Arduino board last year with the intention of using it for building a firing box but haven't yet got round to doing it. So after some more research I put some code together, bought an LCD and came up with this....

    On startup it displays a welcome message


    And has current and Peak boost figures


    Currently it is in its very early development stage, I'm just waiting for a MAP sensor to arrive (hopefully tomorrow ) and I should be able to get some testing done. The LCD screen is a Green backlit one but there are various colours available.

    So far cost wise the Arduino board was 25, LCD screen 8, MAP Sensor 12

    I'm planning on adding a bargraph to it so it has a more visual representation.

    Further development would see selectable displays like oil temp and EGT and a whole range of other things including full colour OLED screens (one could get carried away I suppose (LOL as if I said 'one')). I have seen one project where a guy used a Wii nunchuck as a menu controller so will be toying around with that idea too.

    Obviously there is some device out there that will be able to do all this but I do like a good DIY project
    1996 Olive Green 850 AWD - Follow the project here
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  3. #2
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    Ooooh!

    You clever bunny!

    Interested..
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  5. #3
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    Its also a lot simpler than putting together a LM3914 bargraph kit, literally just the MAP sensor plugged into the Arduino and the Arduino plugged into the LCD (perhaps one or two resistors/capacitors for smoothing/control), and if the code doesn't work right or you want to add something fancy, you just change it and upload it, takes milliseconds

    I got the 20x4 display just in case I wanted to do more with it. The smaller display is 16x2
    1996 Olive Green 850 AWD - Follow the project here
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    That's very impressive. Keep us up to date, that would look spot on in mine but I guess it would be suited to a fly by wire ph2?
    Volvo-less & soon possibly license-less.

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    Ooooh yes, can I have one please?




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    This is very similar to one i've just got from www.zada-tech.com



    My ones doing AFR, EGT, charge temp and intake temp and oil temp.
    You can even set alarms on it so that if any of the measurements goes past a set point it can light up a warning light or sound a buzzer.
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  12. #7
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    Quote Originally Posted by EddyP View Post
    This is very similar to one i've just got from www.zada-tech.com



    My ones doing AFR, EGT, charge temp and intake temp and oil temp.
    You can even set alarms on it so that if any of the measurements goes past a set point it can light up a warning light or sound a buzzer.
    oooooo where from and how much?
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  13. #8
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    Quote Originally Posted by EddyP View Post
    This is very similar to one i've just got from www.zada-tech.com

    My ones doing AFR, EGT, charge temp and intake temp and oil temp.
    You can even set alarms on it so that if any of the measurements goes past a set point it can light up a warning light or sound a buzzer.
    Yeah, I was looking at that too. You can also get the screen on its own (to use with the Arduino) but its around 50 so I binned that idea for now.

    Quote Originally Posted by Biff View Post
    That's very impressive. Keep us up to date, that would look spot on in mine but I guess it would be suited to a fly by wire ph2?
    Will deffo be updating the thread with details

    Its a standalone device, the MAP sensor just needs a line from the inlet manifold. So it would work on any turbo car.

    It also gets it power from the usb cable so I'm going to hack an old 12V usb adaptor/charger I have rolling around in the footwell (think I need to clean the car :/ )
    Last edited by Dangerous Dave; Saturday 11th May 2013 at 10:48.
    1996 Olive Green 850 AWD - Follow the project here
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    Well this is all very interesting, certainly a nice way of showing boost/vacuum etc than the y wobbly pod on top of the dash, interested...definatley.
    http://www.airbrushartists.org/Gal72..._s_Gallery.asp

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  16. #10
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    Quote Originally Posted by Tomcat View Post
    Well this is all very interesting, certainly a nice way of showing boost/vacuum etc than the y wobbly pod on top of the dash, interested...definatley.
    To make it more accurate I could also tap into the barometric sensor behind the headlight to give a local reference value of atmospheric pressure
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    Quote Originally Posted by bomb192uk View Post
    To make it more accurate I could also tap into the barometric sensor behind the headlight to give a local reference value of atmospheric pressure
    Youre just showing off now....lol.
    http://www.airbrushartists.org/Gal72..._s_Gallery.asp

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  18. #12
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    I reckon that would look awesome in the sun visor. Lol
    Volvo-less & soon possibly license-less.

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    1998 V70R AWD Manual BROKEN

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  20. #13
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    Quote Originally Posted by Tomcat View Post
    Youre just showing off now....lol.
    Just exploring the possibilities

    Quote Originally Posted by Biff View Post
    I reckon that would look awesome in the sun visor. Lol
    Ooooh yeah, but I think I would be looking at the visor too much and not the road LOL
    Last edited by Dangerous Dave; Saturday 11th May 2013 at 12:59.
    1996 Olive Green 850 AWD - Follow the project here
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  22. #14
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    I love it, keep the updates rolling in
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  24. #15
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    Well, my MAP sensor hasn't arrived in the post today so I thought I would have a play with the startup sequence and start on the bargraph. The boost values are whatever the Arduino is reading as there isn't anything connected to the input yet.

    1996 Olive Green 850 AWD - Follow the project here
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    Want!!
    Volvo-less & soon possibly license-less.

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    1998 MTE Stage 2 V70 T5 Manual SOLD
    1998 V70R AWD Manual BROKEN

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  27. #17
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    Actually now thinking I want something like the 4 gauge display but in HUD form. (Any ideas Davey? )
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  28. #18
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    Quote Originally Posted by Santa View Post
    Actually now thinking I want something like the 4 gauge display but in HUD form. (Any ideas Davey? )
    I guess you'd need some kind of superbright display to get it to display brightly enough on the screen. Or a miniature projector, which you can get now AFAIK) and cut a hole in your dash
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  29. #19
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    Quote Originally Posted by bomb192uk View Post
    I guess you'd need some kind of superbright display to get it to display brightly enough on the screen. Or a miniature projector, which you can get now AFAIK) and cut a hole in your dash
    Mini projector could work
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  30. #20
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    OK, so connect a Raspberry Pi to a mini projector, connect the Pi to a canbus adapter and plug into the car. There must be some linux based dashboard software available, then just a case of reversing the picture and adjusting the projection so that it displays as square on the screen
    1996 Olive Green 850 AWD - Follow the project here
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