Adding the Gyro...

After hundreds of tests, we are now convinced that this kind of helicopter just cannot fly without some software help (reading that on the internet was not enough, we had to try...). The stabilization system is really needed. So, we are going to start just with a gyro. We know the gyro has the drift issue, but we still think it could fly just with the gyro and the manual controls. So, this is the version 2.0 of our PCB board that includes the IGT-3200 triple-axis gyroscope:

Enhanced and a little bit smaller version:

Old version:

First version (without the gyro):

A 3.3v voltage regulator was needed to provide the 3.3v to the gyro.

Also, another correction was made, because the DJI ESC does not provide the 5v (like the Turnigy ESCs) to power the RC-Receiver and the ATMEGA328. So, now the board is prepared to either receive the power from the ESCs or from the RC Receiver battery. Just a minor wire change will be necessary to convert from one to another.

Another hundreds of tests will be made with this version. And later, maybe we are going to order the sparkfun 6 degrees of freedom (Gyro+Accelerometer) to implement the complementary filter or/and the Kalman Filter.

The LED is being used to indicate the gyro calibration on power up.
Futaba's channel 5 is being used to turn the gyro on/off, which is also indicated by this LED.