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03-06-2006, 02:36 PM
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#1
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Low Bitrate
Join Date: Dec 2004
Posts: 78
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Boost Gauge
I wanted to either find for purchase, or design and build, a boost gauge for my car, so rather than having a gauge sit somewhere on the dash, I could have the readout on my screen.
I know Phidgets has a PSIG meter which you can use with an API setup. Does anyone else know of other solutions or somewhere to purchase something pre-made?
I just need 0-20psi.
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03-06-2006, 03:39 PM
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#2
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Tainted Love
Join Date: Apr 2004
Location: Romania
Posts: 6,314
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Why not use OBDII?
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03-06-2006, 03:47 PM
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#3
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Variable Bitrate
Join Date: Mar 2004
Location: Vancouver, BC, Canada
Posts: 426
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You can't get boost pressure through ODBII. You would need a proprietary protocol that is car specific to be able to read boost.
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03-06-2006, 04:01 PM
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#4
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Low Bitrate
Join Date: Oct 2005
Location: H-Town
Posts: 67
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I think I'd personally go with the Phidgits option. You'd need to build yourself a front-end for it, but at least you wouldn't have to worry about drivers and all that.
BTW, what kinda car? Being a gear-head, I'm just curious.
__________________
To find your favorite restaurants in Houston, check out http://www.thehubgrub.com.
If it's not fun, you're not doing it right!
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03-06-2006, 04:48 PM
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#5
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Low Bitrate
Join Date: Dec 2004
Posts: 78
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2005 GTO CGM-M6
Can't use OBDII for the reason he said above, plus, the car doesn't come stock with any boost devices 
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03-06-2006, 05:17 PM
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#6
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MySQL Error
Join Date: Mar 2004
Location: Bristol
Posts: 13,521
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you could use a regular boost gauge and have a shaft encoder on it to the PC. Or look for a pressure transducer. quite easy really but the former is easier to calibrate in a way.
__________________
If you want more answers on anything I have posted you can find me at digital-car.co.uk
or skiing or diving or doing somthing else fun!
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03-06-2006, 05:21 PM
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#7
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MySQL Error
Join Date: Dec 2004
Location: Los Angeles Ca
Posts: 3,675
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Quote: Originally Posted by Scouse Monkey
you could use a regular boost gauge and have a shaft encoder on it to the PC. Or look for a pressure transducer. quite easy really but the former is easier to calibrate in a way.
the gauge wouldnt be able to turn a shaft encoder
__________________
New System in progress:
M10k
Phaze TD1500 ~> Dynaudio MD130
Phaze TD1500 ~> Seas g18rnx/p
Zapco Ref 500.1 ~ 12" tc-9
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Transflective Xenarc
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03-10-2006, 06:45 PM
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#8
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Low Bitrate
Join Date: Dec 2003
Location: Calgary, AB
Posts: 99
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Take this article from Audi world and work from there http://www.audiworld.com/tech/elec94.shtml
Also boost data via OBDII is going to be way to slow to be useful.
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03-10-2006, 06:54 PM
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#9
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MySQL Error
Join Date: Mar 2004
Location: Bristol
Posts: 13,521
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Quote: Originally Posted by scott_fx
the gauge wouldnt be able to turn a shaft encoder
yes it would. i bet you.
optical ones have no drag.
__________________
If you want more answers on anything I have posted you can find me at digital-car.co.uk
or skiing or diving or doing somthing else fun!
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03-11-2006, 02:57 AM
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#10
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MySQL Error
Join Date: Dec 2004
Location: Los Angeles Ca
Posts: 3,675
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i didnt even think about an optical encoder. you are correct sir! 
__________________
New System in progress:
M10k
Phaze TD1500 ~> Dynaudio MD130
Phaze TD1500 ~> Seas g18rnx/p
Zapco Ref 500.1 ~ 12" tc-9
Behringer DCX2496 ~ Envision Electronics psu
Transflective Xenarc
My Car Pc Install
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03-11-2006, 05:59 AM
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#11
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MySQL Error
Join Date: Mar 2004
Location: Bristol
Posts: 13,521
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Quote: Originally Posted by scott_fx
i didnt even think about an optical encoder. you are correct sir!
hehe wanna know a secret....me neither at 1st...had to think to get myself out of that one! 
__________________
If you want more answers on anything I have posted you can find me at digital-car.co.uk
or skiing or diving or doing somthing else fun!
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03-11-2006, 09:22 AM
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#12
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MySQL Error
Join Date: Dec 2004
Location: Los Angeles Ca
Posts: 3,675
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ha.. ok, well since we are getting all 'dr phil' over here and being honest... i never even heard of an optical encoder until you posted it and i did a search :-) they are pretty cool... now how can i use one in my setup! :-)
__________________
New System in progress:
M10k
Phaze TD1500 ~> Dynaudio MD130
Phaze TD1500 ~> Seas g18rnx/p
Zapco Ref 500.1 ~ 12" tc-9
Behringer DCX2496 ~ Envision Electronics psu
Transflective Xenarc
My Car Pc Install
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03-11-2006, 10:00 AM
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#13
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MySQL Error
Join Date: Mar 2004
Location: Bristol
Posts: 13,521
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haha love it.
the other option is a pressure transducer. Honeywell do some with RS232 interfaces but all you need is to interpret the signal - probably resistance which you can do with most I/O boards, phidgets, joystick port etc etc
hell you could always take the optical enocder out of a mouse scroll wheel or off the ball and use that!!!!
__________________
If you want more answers on anything I have posted you can find me at digital-car.co.uk
or skiing or diving or doing somthing else fun!
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03-11-2006, 02:16 PM
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#14
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Raw Wave
Join Date: May 2003
Posts: 2,021
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Might as well use a pressure sensor such as MPX4250AP, changing output voltage with pressure, cost about $20.
Amplify the voltage (if needed) and send the measured pressure to PC, use serial or USB, easily done with PIC MCUs.
http://www.vpv-motorracing.com/MPX4250AP.pdf
Last edited by Chris31; 03-11-2006 at 02:18 PM.
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03-11-2006, 02:20 PM
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#15
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Raw Wave
Join Date: May 2003
Posts: 2,021
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Opps
He want premade
Ignore my last post 
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