:)Gentlemans, I need to know about the working of electronic gyroscope (known as MEMS gyro)as in rc helicopters ...... searching the net I couldn't find basic working .....
will be thankful if anyone can explain.........

Very clearly explained here:

http://en.wikipedia.org/wiki/Vibrating_structure_gyroscope#MEMS_gyroscope

http://en.wikipedia.org/wiki/Microelectromechanical_systems