[simpits-tech] phidgits + Building Guages

[Matt Bailey]

I was thinking of perhaps a worm gear to drive the needle(s)...the servo
would just drive the worm gear. Probably simpler than using large and
small gears to get more travel...still not truly unlimited travel though
(and you'd need a pretty high res servo). Perhaps one way to accomplish
this would be to mount some sort of sensor on a disc connected to the
motor that just tells the software how many degrees out of 360 the disc
is at, and have the software "remember" how many revolutions it's
turned. It would reset to zero when initialized, then read data from the
sim to determine motor location (of course the relationship of the sim
data to the revolutions of the motor would be described in the
software).

	-Matt Bailey

Gene Buckle wrote:
> 
> > The board is connected to the PC via a USB connector, you can then control
> > the position of each motor in software. So, read value from sim - set
> > motor to appropriate angle.  Repeat until bored.
> >
> 
> The problem is that everyone and their brother has a neat method of
> driving a stepper motor, but nobody says anything about *feedback* from
> that motor.
> 
> This is a required feature for something like an ADI or HSI and useful for
> something like an altimeter.  THIS is something I'd throw money at.
> 
> g.