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I think I might be interested in this project. Is the original poster still monitoring this project page? I see links to two Github repositories, did the orginal poster create those?
For the second circuit, on R4 can I uses a 2.2K resistor? Or maybe stack two 1K resistors in a series connection? Or does it HAVE to be a 2K ohm resistor? Also If I have a RoboGets Arduino Uno R3 board will that work ok?