When using microcontrollers to control models and especially servo motors,
it is desirable to be able to directly control cheap RC peripherals with a
digital interface such as I2C instead of the standard pulse length modulation.
This frees the main controller from RC related waveform generation and enables
you to a large number of servos using just 2 control wires.
Hence, I developed a small board with an I2C interface which is able to
control up to 4 servos or other RC pulse length peripherals: