[simpits-tech] Pneumatic controllers

[Joseph Fagner]

I seem to recall someone over there saying that getting the proper
resolution was not easy and/or cheap.  It was a while back and I'm just
going off the top of my head.  It might have been Craig but I honestly can't
remember.  But I seem to think this was somewhat of a hurdle in this
project.  Maybe your method tackles that.

Jay

-----Original Message-----
From: simpits-tech-bounces at simpits.org
[mailto:simpits-tech-bounces at simpits.org] On Behalf Of Matt Bailey
Sent: Friday, February 25, 2005 10:58 PM
To: Simulator Cockpit tech list
Subject: Re: [simpits-tech] Pneumatic controllers

Awesome, thanks Jay. Yeah I think Craig was the culprit. :) Very encouraging

to see mention of controlling pressure regulators via varying the 
voltage.........I can do that with Phidgets and a hacked servo no problem. 
Just not sure about resolution.......with the API and equipment I'm using, 
I'm seeing a range of about 4500 steps available (I think the numbers are 
floats, but I'm pretty sure the controller, or at least my servos, won't 
reflect anything much finer than steps of 1.0). With the Phidgets quad 
controller and a standard Futaba servo, it looks like I'm getting that much 
resolution on the output side, but I'm skeptical.........it might be the 
controller is just rounding really convincingly (I have not extensively 
tested it). But if I can indeed get 4500 solid, repeatable steps, that's 
90,000ft of altitude in 20ft increments.....maaaaan that would be awesome.

I agree with some comments there.......pressure altimeters do have a unique 
look. The altimeter and some other gauges on the Frasca trainer I used at 
college have, I believe, steppers, and it just isn't the same (at times,
it's 
downright horrid).

	-Matt Bailey 

On Friday 25 February 2005 11:14, Joseph Fagner wrote:
> Go over to viperpit.org and check out this thread
> http://viperpit.org/forum/viewforum.php?f=14
> The guy you might want to look up is Craig Rochester (aka Bricklayer).  He
> is likely the guy that made that video and has been working on this
> concept.
>
> Jay

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