Motor remote control with arduino

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drinu

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Hi at all! Best Wishes!
I want use remote control of my economic small radiocontrolled helicopter. I want use this for control the velocity of a small motor through arduino.
The remote control use infrared rays.
I don't understand which 'law' used the remote control. This is important to program arduino.
Trough the oscilloscope I can post some photo.
The first with the motor to minimum and second with the motor to middle range and third with motor to maximum.
Thank you!

motor low

motor meddle

motor high

IR remote control
 

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