Reading Digital caliper with Arduino

[chucketn]

I have attached schematics of the caliper supply voltage divider and the level shifter circuits I used. Can't do a picture of the caliper at the moment, as the batteries in the camera are dead. I'll post one as soon as the batteries charge.
Thanks for all the help. I find Arduino fascinating, though my programming skills suck. I have built the RT/Dividing head controller posted on another forum and am currently cutting gears with it.
When you post a suggestion for the programing of the Arduino, bear in mind I'm a programming dummy and add a bit of how and why.  Many years ago, I was a technical instructor in the USAF, though you wouldn't think so now. I taught soldering, Basic Electronics, and digital theory, as well as several Avionics Systems. Use it or loose it, they say!

Chuck

Note: on the level shifter, PB1 and PB2 are the Arduino inputs.