[simpits-tech] Simkits and Phidgets (Roy?)

[Chris Brace]

Matt,

The Piher's on the simkits instruments circuit board can be read
directly by a Phidget InterfaceKit's analogue input . I just rewired the
end of the ribbon cable from the simkit instrument to get to the IFKit
input. The problem with coding them is that Pihers's only go 350 degrees
and so the simkits folks used two of them 180 degree's opposed to get
the full 360 degrees needed. It mean that your code needs to read from
one Phier until a certain point (say 270 degrees) and then switches to
and reads from the other Piher. The other problem we found with them is
that there is some drift in the actual position of the "null" zone in
the Piher when you switch direction (CW vs. CCW). We ended up doing some
adjustments in our software to take care of it but it’s a little
troublesome at times.
The servo instrument are a snap, very simple. The only problem I don’t
like about them is the jerky responses, solved with a smoothing routine
in the software or better yet Chester was supposed to be working on
smoothing in the firmware for the servo board themselves (Phidet
advanced servo).

Cheers
Chris


-----Original Message-----
From: simpits-tech-bounces at simpits.org
[mailto:simpits-tech-bounces at simpits.org] On Behalf Of Matt Bailey
Sent: Monday, 21 February 2005 3:09 p.m.
To: Simulator Cockpit tech list
Subject: [simpits-tech] Simkits and Phidgets (Roy?)


I recall Roy had got Simkits working in X-Plane with Phidgets........I'm

curious, what did you have to do (basically) to make this work? Driving
the 
servos is obviously not a big deal, I'm just wondering what hardware you
used 
to read the position sensors (PIHER's?) on some of the Simkits
instruments 
like the ADI and altimeter. I'm thinking it would be nice to get this
working 
myself so I could make an altimeter (right now I should be able to do
things 
like tach, VSI, ASI, etc, but no continuous rotation stuff).

	-Matt Bailey

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