Hi Gene,
I found that site a while back, very useful.? The calipers they show are the very cheap ones which, I believe, have a different output format and are usually 1.5v.? The caliper I'm intending to use copies a Mitutoyo item in both operation and output (think it's called Digimatic SPC or similar). I've played with using the cheap ones but have settled on this 3v version for the exact reasons you're suggesting.
The idea is a little different to the usual TouchDRO arrangement in that the MKR wifi 1010 will be located at the back of the lathe saddle as will the caliper pcb and the Z scale reading head.? The whole lot will be powered by a Lipo battery attached to the Arduino board which has a Lipo charging facility.
By this arrangement, assuming it all works, there will be no wires from the lathe to the tablet as the connection is via BT.? The only time a wire needs to be attached is when the battery is charging and this will be whilst the lathe isn't being used.
I had already powered the caliper from the Arduino output prior to my first post, so was fairly confident the data connection would work.? But with my level of electronics knowledge, it's nice to have some reassurance for experts.
?
