Hi Gary
Nice little home brew DLRO for those who wish to build one. Considering the bang for the buck it gets things done in a reasonable fashion.
I have a question about the face plate. The current source is labeled 100 uA? That a mistake? Also as trivia I noticed in the image of the unit running one current lead seems inboard and one outboard on the resistor leads. Not any big deal but for actual use wouldn't the current source leads be outboard?
As to the use of Kelvin leads. While I agree that they would be nice to have, many sets, even cheap sets would cost well over what it cost to build the project. I figure all things considered that just a brief explenation of how to configure the leads is adequate.
Again, nice little project.
Ron