I have just tested the latest flight controller board from Minsoo Kim (the Blue board version).
This new board uses an ATMEGA 168 and a new firmware with lot of new features.
Here a video of the first tests flights of the Quad Rotor Observer (QRO) v5 with this new KKmulticopter BLUE board from Minsoo Kim.
As you will observe in the video, the hoovering of the QRO is very stable (hands off test). The model is also able to do a high speed manoeuvering and high speed turns due to the high performance of this new flight controller board (Woow... this is really fun and I enjoy a lot...)
Flight controller hardware:
KKmulticontroller "BlueBoard" from Minsoo Kim's
( http://kkmulticopter.kr ) and based on the board of Rolf R Bakke
Flight controller firmware:
XXcontroller_KR_v1_0 based on assembly code by Rolf R Bakke converted by Mike Barton modified by Minsoo Kim and Jean-Louis Naudin
- 4 brushless motors DualSky XM2822CA 1450KV 7A
- 4 ESC 12A XC1210-BA
- Lipo battery 3S (11.1V) 2500 mAh
- receiver Corona CR6D 2.4 Ghz
More infos at: http://diydrones.com/profile/JeanLouisNaudin