Shop OBEX P1 Docs P2 Docs Learn Events
I need to sense air with an Air Volume Flow Sensor and a Basic Stamp? — Parallax Forums

I need to sense air with an Air Volume Flow Sensor and a Basic Stamp?

JoeJoe Posts: 184
edited 2008-03-27 03:01 in BASIC Stamp
Hi :

Do you know about an Air Volume Flow Sensor ?

I need to measure air volume with a flow sensor
and a Basic Stamp.

Do you know where can I find this sensor.

Thanks, Joe
PS: About 40 Lts/min ( 13 gal/min) or perhaps more
than 40 Lts/min.

Comments

  • PFloyd36069PFloyd36069 Posts: 135
    edited 2008-03-27 00:28
    Hi Joe,

    Im not sure how much air flow they're good for but couldnt you use the MAF (Mass Air Flow) sensor off of a·car? If im correct there are 3 pins used (5V ref, ground, and 0-5V relative to the amount of air flow). You could go to a junkyard and get one. Here's some info on them (http://en.wikipedia.org/wiki/Mass_flow_sensor). Hopes this helps a little.

    Bryan
  • icepuckicepuck Posts: 466
    edited 2008-03-27 03:01
    Try to find a three wire MAF from a GM product.. cut a few inches of wire along with the connector.
    black = ground
    green = signal(middle wire)
    red or orange = +5v
    GM used to have two types of MAFS and MAPS(mid nineties) analog and digital. The digital version produced a 5v square wave signal
    that varied with air flow, which would make it easy to hook up to a basic stamp. The way to tell the difference is to use a scope to look at the signal it produces.
    Take note of what you get your senors from, year, model, engine size, chances are you may end up with a non-working MAF
    some auto parts store require you to turn in the old part for a core.
    -dan
Sign In or Register to comment.