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5v power supply #4683085
03/03/18 11:04 AM
03/03/18 11:04 AM
Joined: Dec 2005
Posts: 463
IL
LAGA Offline OP
LAGA  Offline OP
Joined: Dec 2005
Posts: 463
IL
Im installing a Areoforce Interceptor gauge and will be adding a boost sensor to it. The boost sensor uses a separate 12v to 5v power supply converter. They advise to install a 2A inline fuse in the install. I can get a 12v to 5v 2A converter on Amazon for $25 less. Will this work? With what Im spending on the gauge and sensor $25 may not seem like a substantial savings, but it just ticks me off when companies squeeze that extra money out of you on something that should come with the product. I read there is a way to tap into the ECM for 5v, but Id rather not do that. Thanks.


Four legs good, two legs better!
Re: 5v power supply [Re: LAGA] #4683094
03/03/18 11:16 AM
03/03/18 11:16 AM
Joined: Oct 2014
Posts: 12,051
Idaho
CT8 Online content
CT8  Online Content
Joined: Oct 2014
Posts: 12,051
Idaho
Since you feel the need to buy the $$$ gauge then the extra $$$ for oem seems foolish ? Don't know what to say.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: 5v power supply [Re: CT8] #4683101
03/03/18 11:25 AM
03/03/18 11:25 AM
Joined: Dec 2005
Posts: 463
IL
LAGA Offline OP
LAGA  Offline OP
Joined: Dec 2005
Posts: 463
IL
The gauge costs what it does and there are few alternatives. The power supply converter is a $5 part that they mark up to $30.

Last edited by JHZR2; 03/03/18 12:34 PM. Reason: Censor bypass

Four legs good, two legs better!
Re: 5v power supply [Re: LAGA] #4683143
03/03/18 12:03 PM
03/03/18 12:03 PM
Joined: May 2009
Posts: 5,424
Canada
expat Offline
expat  Offline
Joined: May 2009
Posts: 5,424
Canada
You can buy a Buck converter off ebay for a little over $1 inc shipping.

This will give you a stabilized power supply that you can set to whatever voltage you wish.

There will also be dedicated voltage conversion chips that are used for the very purpose you need. (About 10 cents each)

eBay Link

I had the same problem when needing a stable 10v power supply for my Gas and Temp gauges on my car

Last edited by JHZR2; 03/03/18 12:36 PM. Reason: hyperlinked to prevent screen from being too wide
Re: 5v power supply [Re: LAGA] #4683172
03/03/18 12:48 PM
03/03/18 12:48 PM
Joined: Mar 2007
Posts: 204
Minneapolis
03cvpi Offline
03cvpi  Offline
Joined: Mar 2007
Posts: 204
Minneapolis
Just make sure there is a 2a fuse on the 12v side, if the converter smokes it won't take something else with it or maybe start a fire.

Re: 5v power supply [Re: LAGA] #4683186
03/03/18 01:17 PM
03/03/18 01:17 PM
Joined: Dec 2005
Posts: 463
IL
LAGA Offline OP
LAGA  Offline OP
Joined: Dec 2005
Posts: 463
IL
Thanks for the input. Like me, most guys on the Mustang forums are mad at Areoforce. They charge $50 for the sensor and dont supply anything you need to make it functional so you wind up spending another $50 for their converter and hoses and fittings. I got the power taken care of now I have to go out and get vacuum hose and barbed fitting to go into SC


Four legs good, two legs better!
Re: 5v power supply [Re: LAGA] #4683624
03/03/18 09:30 PM
03/03/18 09:30 PM
Joined: Nov 2006
Posts: 20,145
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,145
MA, Mittelfranken.de
Empty the guts from a car USB cell phone adapter and wrap it with heat shrink, it will give 5V 1A.


ASE L1, Master. Deutsch Meisterbrief.
Re: 5v power supply [Re: LAGA] #4683704
03/03/18 11:37 PM
03/03/18 11:37 PM
Joined: Dec 2013
Posts: 2,293
Fort Worth, Texas
clinebarger Offline
clinebarger  Offline
Joined: Dec 2013
Posts: 2,293
Fort Worth, Texas
What is your definition of a "Boost Gauge".....One that reads zero at sea level with the engine off?
There should be a MAP PID readout from the OBD.....It just reads "Absolute Pressure", Not "Relative Pressure".


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto
Re: 5v power supply [Re: LAGA] #4683794
03/04/18 07:11 AM
03/04/18 07:11 AM
Joined: Aug 2005
Posts: 910
dayton oh
kc8adu Offline
kc8adu  Offline
Joined: Aug 2005
Posts: 910
dayton oh
cant imagine a gauge needing much current.
might be as simple as a 7805 3 terminal regulator.
costs $0.25

Re: 5v power supply [Re: clinebarger] #4683829
03/04/18 08:46 AM
03/04/18 08:46 AM
Joined: Dec 2005
Posts: 463
IL
LAGA Offline OP
LAGA  Offline OP
Joined: Dec 2005
Posts: 463
IL
Originally Posted By: clinebarger
What is your definition of a "Boost Gauge".....One that reads zero at sea level with the engine off?
There should be a MAP PID readout from the OBD.....It just reads "Absolute Pressure", Not "Relative Pressure".

a boost gauge reads the pressure a supercharger puts out. At idle or partial throttle it will read as a vacuum of around minus 30 pounds as this is the measurement of air being sucked in by the pistons. Under heavy acceleration, my gauge will go up 6 pounds. This is the measurement of air being pumped into the engine by the supercharger. Cars built without S.C. do not have this sensor, so you have to add one yourself. Mine is a aftermarket SC made by Edelbrock.


Four legs good, two legs better!
Re: 5v power supply [Re: LAGA] #4684445
03/04/18 07:43 PM
03/04/18 07:43 PM
Joined: Apr 2005
Posts: 588
Under the hood
Carmudgeon Offline
Carmudgeon  Offline
Joined: Apr 2005
Posts: 588
Under the hood
Plenty of 12v to 5v adapter harnesses to hard wire dash cams for <$15.

Just cut the USB plug off.

Re: 5v power supply [Re: LAGA] #4684681
03/04/18 11:12 PM
03/04/18 11:12 PM
Joined: Dec 2013
Posts: 2,293
Fort Worth, Texas
clinebarger Offline
clinebarger  Offline
Joined: Dec 2013
Posts: 2,293
Fort Worth, Texas
Originally Posted By: LAGA
Originally Posted By: clinebarger
What is your definition of a "Boost Gauge".....One that reads zero at sea level with the engine off?
There should be a MAP PID readout from the OBD.....It just reads "Absolute Pressure", Not "Relative Pressure".

a boost gauge reads the pressure a supercharger puts out. At idle or partial throttle it will read as a vacuum of around minus 30 pounds as this is the measurement of air being sucked in by the pistons. Under heavy acceleration, my gauge will go up 6 pounds. This is the measurement of air being pumped into the engine by the supercharger. Cars built without S.C. do not have this sensor, so you have to add one yourself. Mine is a aftermarket SC made by Edelbrock.



Yes sir, I understand how it works. I think you misunderstand "Absolute" vs "Relative".......Only "Boy Racer" & Diagnostic gauges read relative pressure (My Cobalt has a factory installed "Boy Racer" Vacuum/Boost gauge) So don't take this as me bad mouthing you or your car. I also have a Aeroforce Interceptor in my Camaro.

Relative Vacuum/Boost gauges are set to 0-PSI at sea level which is actually 14.7-PSI Absolute Pressure.

When reading a OBD date stream or logging OBD data......The reading will always be Absolute (PSI or KPA) There is different scaling depending on what MAP sensor your using (1-BAR/2-BAR/3-Bar).

I don't know what year/engine Mustang you have, But I do recall some Fords not having a MAP & relying only on MAF/BARO input for base fueling/VE which I am not crazy about....But that's another topic altogether.

If I were you.....
*Buy a GM 2-BAR MAP Sensor part# 16040609 (Can read over twice the boost your making)
*Your ECM has a VERY stable 5-Volt reference circuit (C-Circuit in Ford speak) The A/C pressure transducer is a good source to piggyback off of....No reason to buy a signal converter/conditioner!!
*Scale the Aeroforce gauge to read the MAP output to your liking.

GM MAP sensor wiring....
Pin A -- Ground, To a GOOD ground (Engine Block/Battery)
Pin B -- Sensor output, To the Analog Input on your Interceptor gauge.
Pin C -- +5 volts, A/C pressure transducer C-Circuit.


GM 2-BAR sensor scaling.....
Relative / Absolute-----------------MAP Output VDC
14.31psi / 29.01psi-----------------4.90V
14.00psi / 28.70psi-----------------4.84V
13.00psi / 27.70psi-----------------4.67V
12.00psi / 26.70psi-----------------4.50V
11.00psi / 25.70psi-----------------4.33V
10.00psi / 24.70psi-----------------4.16V
9.00psi / 23.70psi------------------3.99V
8.00psi / 22.70psi------------------3.82V
6.00psi / 20.70psi------------------3.47V
4.00psi / 18.70psi------------------3.13V
2.00psi / 16.70psi------------------2.79V
0.00psi / 14.70psi------------------2.45V
5.00inHg / 12.24psi-----------------2.03V
10.00inHg/ 9.78psi------------------1.61V
15.00inHg/ 7.33psi------------------1.19V
20.00inHg/ 4.87psi------------------0.77V
25.00inHg/ 2.41psi------------------0.35V
29.10inHg/ 0.40psi------------------0.02V


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto
Re: 5v power supply [Re: LAGA] #4687523
03/07/18 02:11 PM
03/07/18 02:11 PM
Joined: Aug 2005
Posts: 7,152
Leamington, ON, Canada ..... r...
Papa Bear Offline
Papa Bear  Offline
Joined: Aug 2005
Posts: 7,152
Leamington, ON, Canada ..... r...
4.90V at what current? What is the load resistance ?


2016 Dodge GC Deep Cherry 5W-30 Dino
2013 SYM Wolf Classic 150 T4 15W-40
2009 V-Star 250 Black Cherry 20W-50 Dino
https://www.hogsforhospice.com/
Friend of Bill W. since '89

Re: 5v power supply [Re: Papa Bear] #4688158
03/07/18 11:21 PM
03/07/18 11:21 PM
Joined: Dec 2013
Posts: 2,293
Fort Worth, Texas
clinebarger Offline
clinebarger  Offline
Joined: Dec 2013
Posts: 2,293
Fort Worth, Texas
Originally Posted By: Papa Bear
4.90V at what current? What is the load resistance ?


I guess your talking to me? The current draw is so small that it's not relevant.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto
Re: 5v power supply [Re: clinebarger] #4688400
03/08/18 08:26 AM
03/08/18 08:26 AM
Joined: Aug 2005
Posts: 7,152
Leamington, ON, Canada ..... r...
Papa Bear Offline
Papa Bear  Offline
Joined: Aug 2005
Posts: 7,152
Leamington, ON, Canada ..... r...
Originally Posted By: clinebarger
Originally Posted By: Papa Bear
4.90V at what current? What is the load resistance ?


I guess your talking to me? The current draw is so small that it's not relevant.


Then a heavy duty power supply isn't required.
I'm wondering why a cheap 1A Dollar Store 12V to 5V USB supply wouldn't work in this case.


2016 Dodge GC Deep Cherry 5W-30 Dino
2013 SYM Wolf Classic 150 T4 15W-40
2009 V-Star 250 Black Cherry 20W-50 Dino
https://www.hogsforhospice.com/
Friend of Bill W. since '89

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