Balancing robot for dummies

Forum 2005-2010 (read only) General Exhibition
186

Hopefully a quick one folks, in the v2 code for the serial GUI it has this function:

int getGyroRate() 
{                                             // ARef=3.3V, Gyro sensitivity=2mV/(deg/sec)
  return int((sensorValue[GYR_Y] * 0.88888888889)*-1);
}

Where does the 0.88888888889 constant come from? it doesn't seem to match any ref voltage etc.

Thanks!