User Manual

© D Bird 2014 Page 2
Introduction
The HobbyKing KK2.1 Multi-Rotor controller manages the flight of (mostly) multi-rotor Aircraft
(Tricopters, Quadcopters, Hexcopters etc). Its purpose is to stabilize the aircraft during flight and
to do this, it takes signals from on-board gyroscopes (roll, pitch and yaw) and passes these
signals to the Atmega324PA processor, which in-turn processes signals according the users
selected firmware (e.g. Quadcopter) and passes the control signals to the installed Electronic
Speed Controllers (ESCs) and the combination of these signals instructs the ESCs to make fine
adjustments to the motors rotational speeds which in-turn stabilizes the craft.
The HobbyKing KK2.1 Multi-Rotor control board also uses signals from your radio system via a
receiver (Rx) and passes these signals together with stabilisation signals to the Atmega324PA IC
via the aileron; elevator; throttle and rudder user demand inputs. Once processed, this
information is sent to the ESCs which in turn adjust the rotational speed of each motor to control
flight orientation (up, down, backwards, forwards, left, right, yaw).