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Old 09-09-2017, 02:28 PM   #1
karlis
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Default Super stealthy Boost Gauge install

https://imgur.com/6d5RFPZ

My ambient temp gauge's lcd gave up like they do on almost all of the old 940s and I decided to re-use the super stealthy place for a nice diy arduino boost gauge.


Parts list:
Arduino Nano
MPX5700AP pressure sensor
128x32 OLED
12v to 5v DC converter

Code

Some photos here

And a short video

https://www.youtube.com/watch?v=a2ml0koxlxM&t
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Old 09-09-2017, 08:19 PM   #2
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Baller
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Old 09-10-2017, 07:28 PM   #3
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Neat project, my daughter likes your accent
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Old 09-10-2017, 09:30 PM   #4
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Really nice! Thanks for allowing the community to recreate it.
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Old 09-11-2017, 02:45 PM   #5
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Excellent!
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Old 09-11-2017, 04:18 PM   #6
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I love when people open source parts they make like this.
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Old 09-11-2017, 05:11 PM   #7
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I agree with everyone. This is awesome.
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Old 09-11-2017, 05:25 PM   #8
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this is awesome. how the hell do you program it ?
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make k-jet great again.
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Old 09-11-2017, 05:48 PM   #9
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Thanks dudes!
I knew that someone else could like this idea too!

@Jack - it's an Arduino Nano, so you use arduino software + a mini or micro usb cable to program it. Tutorial here -

I actually glued the usb cable to the arduino (dirty way) and routed it under dash, so I can re-program it whenever I want to.

I am also thinking of creating a EGT gauge using the same parts, just a different sensor.
But this wont be for a volvo, but for my 1.9tdi vw, as for diesels EGT is super critical :D

And you can always add a button to it (wire any button to it) and use it to switch between modes n stuff - boost, egt, ambient temp etc. But then i would suggest using a bigger arduino or add extra memory or just write a super good code, so it can store it.

Another idea was to maybe try and make a trip computer out of it, to measure fuel consumption, I read somewhere that lh2.4 actually have a trip computer pin, for those super rare volvos...but that is just an idea right now, I am actually selling my volvo, as I am moving back to Latvia soon. I might get another one there and play around a bit more. hehe
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Old 09-11-2017, 05:52 PM   #10
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sweet share! may actually have a use for my Chinese Arduino now
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Old 09-11-2017, 05:59 PM   #11
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Fuk yeah

I always hated my a pillar boost gauge in the 850 but thought the vent ones were particularly stupid

Egt would be awesome too
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Old 09-11-2017, 09:43 PM   #12
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I don't know what an arduino can do, so I'll ask.

Can you run 2 of those displays off of one arduino? I have a 1967 Galaxie and it has cut out sections in the dash where a temperature and oil pressure idiot lights were. Look Here

The light windows are rectangular and about the same size as the Volvo Temp guage window. This would be an awesome way to turn my idiot lights into real guages.
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Old 09-11-2017, 10:41 PM   #13
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Awesome!

But I do have a quick question. Would you rather the lady leave her dogs poo in your yard or put it in your garbage can?
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Old 09-11-2017, 10:59 PM   #14
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this is amazing
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Old 09-11-2017, 11:23 PM   #15
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This is so cool. Thanks for showing us!!
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Old 09-11-2017, 11:29 PM   #16
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A++ Stealth Factor, A+++ Ingenuity

That 600cc kart you have looks quite fun
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Old 09-11-2017, 11:40 PM   #17
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moved this to 'perf. & mods" - I didnt want it getting lost in maintenance. This is brilliant. thanks for sharing!
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Old 09-12-2017, 03:54 AM   #18
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That's pretty slick! I'm thinking wideband display
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Unique for sure.
I don't think anyone is going to tell you it looks bad.
Kinda can't go wrong under the hood.
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Old 09-12-2017, 04:10 AM   #19
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Quote:
Originally Posted by HiSPL View Post
I don't know what an arduino can do, so I'll ask.

Can you run 2 of those displays off of one arduino? I have a 1967 Galaxie and it has cut out sections in the dash where a temperature and oil pressure idiot lights were. Look Here

The light windows are rectangular and about the same size as the Volvo Temp guage window. This would be an awesome way to turn my idiot lights into real guages.
I have never done it myself, but a quick search for "two I2C displays from on Arduino" does find some info on regards how to do it, I would upgrade to a base arduino uno then, as the nano has a very small memory size + is generally less powerful. Link to something I found

I am waiting for more of those oleds and when i get them I might give it a go on using two screens, two different sensors and different codes on my Arduino Uno.

There are videos too

And I suggest getting a kit like this, as then you have the chance to play around with bunch of cool things.

Last edited by karlis; 09-12-2017 at 04:36 AM..
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Old 09-12-2017, 04:40 AM   #20
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That's pretty slick! I'm thinking wideband display
That would be awesome aswell, just need to buy or build a lamda controller and make it output to arduino, then you can do whatever with that data, even send it to your phone via bluetooth or wifi, or what the heck, make it available online via 4g modem - lol...imagine, a website where people can check your afr as of right now, stupid, but still cool :D
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Old 09-12-2017, 08:24 AM   #21
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Originally Posted by karlis View Post
That would be awesome aswell, just need to buy or build a lamda controller and make it output to arduino, then you can do whatever with that data, even send it to your phone via bluetooth or wifi, or what the heck, make it available online via 4g modem - lol...imagine, a website where people can check your afr as of right now, stupid, but still cool :D
I already have an LC-1 wideband sensor, so thanks for the link! Perfect solution
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Old 09-12-2017, 10:19 AM   #22
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that's really good
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Old 09-12-2017, 10:43 AM   #23
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Really nice indeed! Now go fill up your gas tank!!
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Old 09-12-2017, 01:44 PM   #24
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Really nice indeed! Now go fill up your gas tank!!
Took long enough for someone to notice :D
It is actually half empty in that photo, I just sliced in the wrong cables for power and stole it from the fuel gauge, so it shows 0 all the time, all fixed now
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Old 09-12-2017, 05:01 PM   #25
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You just gave me an idea to use this display i've had laying around....

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