Reading Digital caliper with Arduino

[chucketn]

I have found a Hall effect switch based tach sketch for the Arduino, and modified it to display on a 16x2 LCD. I chose hall effect because that is what I use on the DRO-550 on my mill, and had ordered 2 switches when I built it. I will build it up with a dedicated Arduino and add it to the DRO-550 setup so I don't have to swap out an axis display to use the tach.
I plan on combining this with the HF Scale reading sketch to make a simple DRO setup for my lathe. I will share the sketches if anyone is interested. Didn't really need the tach on the lathe as mine has a tach built into the control box.

Chuck