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PWM

The maximum pulse width for an RC servo is typically 2 milliseconds (ms). The minimum pulse width is usually around 1 ms. The length of the pulse determines how far the servo motor turns. For example, a 1.5 ms pulse will usually make the motor turn to the 90 degree position, which is the neutral position. The type of signal control that uses pulse width to move a servo is called Pulse Width Modulation (PWM). A servo controller can receive inputs from other components, like a joystick, potentiometer, or sensor feedback, to set the control signal for the servo. A pulse width modulation (PWM) of 1500 microseconds (us) indicates that a device is stopped. Here are some other PWM pulse widths: 1000 us: Full speed clockwise 2000 us: Full speed counter-clockwise PWM signals have two key parameters: frequency and duty cycle. The period of a PWM signal is the time it takes for the signal to complete one cycle. The frequency of a PWM output is calculated by dividing 1 by the period.