YKS OpenPilot CC3D Flight Controller Board 32-bit for RC 250 Racing Quadcopter Multicopter YKS Openpilot 32 Bits CC3D Open Source all-in-one stabilization Flight Controller for QAV250 F330 380 450 550 FPV Quadcopter. Supported by powerful OpenPilot GCS. Powerful STM32 32-bit microcontroller running at 90MIPs with 128KB Flash and 20KB RAM. 3-axis high-performance MEMs gyros and 3-axis high-performance MEMs accelerometer. Supports several common RC inputs: 6 PWM channels, combined PPM, Spektrum/JR DSM2, DSMJ, DSMX satellites, and Futaba S.Bus receivers. Direct high speed USB support with no drivers required, a truly plug and play device.