# Servos

Servos are essentially small motors that can only rotate a set number of degrees via a 3-wire PWM connector. 

Servos are used in FTC for high-precision applications that are low-load. Typically, servos have limited range of rotation (180°-270° is common). The output has splines, which are the rigid teeth that are on top of the servo.

## Dual Mode

Dual Mode servos are servos that allow users to switch between two operational modes: Servo mode and continuous mode.

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<summary>Servo Mode</summary>

&#x20;Servos that can rotate to a given position based on a PWM (Pulse Width Modulation) input signal are called regular servos.

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<summary>Continuous Mode</summary>

Continuous rotation servos are effectively just small motors in a servo form factor. They have no position control; instead, a PWM signal is used to control their rotation speed.

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