Update README.md

nshaver · Dec 10, 2017 · deb8fcc · deb8fcc
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 # balancing_robot_vehicle
 Balancing Robot Vehicle
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+I used this guy's YABR (Yet Another Balancing Robot) project as my guide: www.brokking.net/yabr_main.html
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+I used his code with some slight modifications:
+- uses NRF24L01 radios instead of bluetooth to Nunchuk
+- uses the pin mappings of my CNC shield whereas he directly wired to his DRV8825 drivers
+- added incr/decr buttons for P and I and D to help to tune the PID variables.