When I connect the Raspberry Pi to my Nybble and walk it, the Raspberry Pi is easy to reset. Please tell me how to improve it.I dial the potentiometer clockwise to get the lowest voltage to the servo. And I use the following lithium polymer battery.
Turnigy nano-tech 2000mAh 2S (2cell / 7.4V) 20 ~ 40C
200g should be ok.