I have a project in mind that requires the use of four vacuum sensors. Basically, I want to balance a four carburettor setup on a four cylinder motorcycle by measuring the vacuum available at the intake ports. I envision using an arduino with an LCD output to graphically show me their relative levels. In addition I'd like to measure the throttle position and indicate that on the LCD as a zero to 100 percent visual. I think the range needing to be meaured on the vacuum would be up to 15 inch hg, possibly even more. I have purchased an arduino in the past and basically done the 'hello world' with it. This noob is looking for some help.
Thanks...
Vacuum sensor help
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Please be positive and constructive with your questions and comments.
- adafruit_support_bill
- Posts: 88096
- Joined: Sat Feb 07, 2009 10:11 am
Re: Vacuum sensor help
Freescale makes a range of integrated pressure sensors that are very easy to interface to the Arduino. I used some of these in a recent project.
http://www.freescale.com/files/sensors/ ... pdf?fpsp=1
That particular model reads 0-1020mm H20, but they make other pressure ranges as well.
The output of these devices is 0-5v, which is a perfect match for the arduino analog inputs.
http://www.freescale.com/files/sensors/ ... pdf?fpsp=1
That particular model reads 0-1020mm H20, but they make other pressure ranges as well.
The output of these devices is 0-5v, which is a perfect match for the arduino analog inputs.
- stinkbutt
- Posts: 593
- Joined: Wed Feb 17, 2010 2:40 am
Re: Vacuum sensor help
Freescale makes air pressure sensors that appear to do what you're looking for, and they're intended for this sort of stuff.
http://www.freescale.com/webapp/sps/sit ... de=MPX4250
http://www.freescale.com/files/sensors/ ... X4250A.pdf
They're $14 a pop on mouser.
Sparkfun's also got some stuff, though I'm not certain it'd give you the resolution, range, and response that you'd need for an automotive application.
http://www.sparkfun.com/products/8161
http://www.sparkfun.com/products/9694
I don't think they're appropriate, but you can make that call. If you're dickering with the boost on your cycle you know more about automotive stuff than I do.
Also keep in mind it might make sense to get 5, not 4, and use one as a baseline for atmospheric pressure.
Oh, I just found some guy named spiff who worked with those sensors on an arduino.
http://www.freescale.com/webapp/sps/sit ... de=MPX4250
http://www.freescale.com/files/sensors/ ... X4250A.pdf
They're $14 a pop on mouser.
Sparkfun's also got some stuff, though I'm not certain it'd give you the resolution, range, and response that you'd need for an automotive application.
http://www.sparkfun.com/products/8161
http://www.sparkfun.com/products/9694
I don't think they're appropriate, but you can make that call. If you're dickering with the boost on your cycle you know more about automotive stuff than I do.
Also keep in mind it might make sense to get 5, not 4, and use one as a baseline for atmospheric pressure.
Oh, I just found some guy named spiff who worked with those sensors on an arduino.
- zener
- Posts: 4567
- Joined: Sat Feb 21, 2009 2:38 am
Re: Vacuum sensor help
Look at automotive MAP sensors.
- wibertpaul
- Posts: 1
- Joined: Thu Sep 13, 2018 11:08 pm
Re: Vacuum sensor help
i know its very old thread! but please help me out sensor of my vacuum is not working!
- adafruit_support_mike
- Posts: 67454
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Vacuum sensor help
We can only offer advice based on the information we have, and 'not working' has almost no diagnostic value.
What have you done so far, what results did you expect, and what's the last thing that worked correctly before the first thing that didn't?
What have you done so far, what results did you expect, and what's the last thing that worked correctly before the first thing that didn't?
Please be positive and constructive with your questions and comments.