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: 4ChanServoController.