References / Links How to make a robot September 20, 2016 rhubarb https://sites.google.com/site/howtomakearobot/home
References / Links Arduino and xbee battery test results September 10, 2016 rhubarb https://www.faludi.com/projects/arduino-and-xbee-battery-test-results/
References / Links 3v vs 3.3v September 10, 2016 rhubarb https://blog.adafruit.com/2012/04/20/ask-an-educator-can-i-use-a-3v-lithium-battery-in-a-3-3v-circuit/