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Old 05-19-2008, 09:10 PM   #1 (permalink)
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Questions about mpguino

sorry if this is redundant, but I just have really been able to find answers.


Would an arduino board with usb work with the source code being developed?

Does the code specific the 16x20 lcd screen/could it easily be changed to work with a different sized screen?

Does it interface with the obdII port/how many different wires need to be spliced into from the car?

would it work with my 97 escort?

some of you seem to be powering it from 9v batteries or simliar, I could splice into power from somewhere else in my car, no?

Does it keep average/trip mpg along with current mpg?

I just really want to have a constant read out of my mpg, and I don't really want to spend 150-170 dollars on that.

Plus DIY or die.

keep up the great work.

thanks, zach.

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Old 05-19-2008, 09:24 PM   #2 (permalink)
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Well it's supposed to work with any car, even from the 50's and such, so the 97 escort would be covered. And I'm pretty sure it does the Average/trip mpg and current mpg, plus maybe a little more. As far as the power source, I don't know, but you could probably run it off of your cars power. It depends on whether or not it was designed for 9v or not, cause your car runs around an average of 13.7-14's-ish. So that's quite a bit more power to the gauge.

As for the rest, I'm not sure, someone else will have to chime in. The gauge from what I hear costs around 40 bucks or less to build.
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Old 05-19-2008, 09:28 PM   #3 (permalink)
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Quote:
Originally Posted by mhmitszach View Post
Would an arduino board with usb work with the source code being developed?
Yes, the USB (decimilia) board works, dcb is just using the serial to claim it's lower cost on the project total.

Quote:
Originally Posted by mhmitszach View Post
Does the code specific the 16x20 lcd screen/could it easily be changed to work with a different sized screen?
Yes, It'll work on a different screen, at least one with the same pinout.


Quote:
Originally Posted by mhmitszach View Post
Does it interface with the obdII port/how many different wires need to be spliced into from the car?
Four: +12v power, Ground, VSS, one injector wire.

Quote:
Originally Posted by mhmitszach View Post
would it work with my 97 escort?
As long as it has fuel injection, then yes.

Quote:
Originally Posted by mhmitszach View Post
some of you seem to be powering it from 9v batteries or simliar, I could splice into power from somewhere else in my car, no?
Yes, you can use up to 15v, so your cars 12v will work.

Quote:
Originally Posted by mhmitszach View Post
Does it keep average/trip mpg along with current mpg?
Yes.
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Old 05-19-2008, 09:33 PM   #4 (permalink)
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Thanks much.

Wait, I need another power source besides the 12v?

How close to being tried and true would you say it is right now?

I can't seem to tell how well it is working for everyone.
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Old 05-19-2008, 09:47 PM   #5 (permalink)
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Quote:
Originally Posted by DifferentPointofView View Post
Well it's supposed to work with any car, even from the 50's and such,
an off the shelf, store bought, fuel flow meter is about $120 for a carbureted engine, so we are in need of less expensive fuel flow meter ideas. to keep the price low for non-injected engines. see the thread about a mileage computer for a carb'd engine.

no, the MPGuino does not use the OBD port.

The MPGuino is currently in the working prototype stage of development.
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Old 05-20-2008, 11:29 AM   #6 (permalink)
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Just a thought....

Wire 12v, ground, vss, and injector wire into a female ethernet connector, and then have a another connector located under dash and wire accordingly to that connector to simplify everything into one cable.

Although really, this could work for any cable/connector with at least four wires.

Would work , right?
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Old 05-20-2008, 12:57 PM   #7 (permalink)
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yes, it'll work. In fact that's basically what I'm doing, I'm just using a 6 conductor phone wire. Four wires for the current prototype, and two more for later expandability "just-in-case"
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Old 05-20-2008, 05:59 PM   #8 (permalink)
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Quote:
Originally Posted by DifferentPointofView View Post
Well it's supposed to work with any car, even from the 50's and such, so the 97 escort would be covered. And I'm pretty sure it does the Average/trip mpg and current mpg, plus maybe a little more. As far as the power source, I don't know, but you could probably run it off of your cars power. It depends on whether or not it was designed for 9v or not, cause your car runs around an average of 13.7-14's-ish. So that's quite a bit more power to the gauge.

As for the rest, I'm not sure, someone else will have to chime in. The gauge from what I hear costs around 40 bucks or less to build.
Wait, how exactly does this work with really old cars, circa the 70's? If it actually well then I really need to start reading up on this project.
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Old 05-20-2008, 06:21 PM   #9 (permalink)
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It doesn't. There are some discussions about making it work with carbs and old diesels (diesels are pretty straight forward actually), but no working models yet. It is just a matter of time though.
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Old 05-20-2008, 06:30 PM   #10 (permalink)
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Ok, so it doesn't work yet, but in theory it will work for that in some capacity if someone decides to put the time and effort into it.

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