+* f_untethered
+ - [ ] unplug usb cable from challenge-bot, if it is still plugged in
+ - [ ] locate materials
+ - [ ] challenge-bot, laptop, usb cable
+ - [ ] on laptop, in fritzing, open
+ build-stages/f_untethered/untethered.fzz
+ - [ ] on laptop
+ - [ ] hook up black 9v battery to power arduino
+ - [ ] hook black battery pack's red wire to arduino "vin" pin
+ - [ ] hook black battery pack's black wire to breadboard blue
+ ground rail.
+ - [ ] unplug usb cable from challenge-bot, if it is still plugged in
+ - [ ] turn on clear motor battery pack, 4xAA
+ - [ ] turn on black 9v battery pack
+ - [ ] check that robot rolls forwards using only onboard power