[simpits-tech] Conversion of electrical gauges

[Matt Bailey]

Howdy,

  I occasionally see stuff like electronic tachs, altimeters, etc on ebay. I 
know small systems instruments like EGT, oil pressure, etc as seen on light 
planes, typically use air core motors, but what about the big stuff 
(especially altimeters and other instruments with lots of travel)? Judging by 
the connectors on one tachometer I see, I assume it's a digital 
connection....sending data and not just a simple voltage or something?

  I'm about ready to start working on some Phidgets instruments using servos, 
but I also want to look at other solutions (I'm still not sure what I'm going 
to do about the altimeter.....Pihers sound troublesome).

	-Matt Bailey