Pololu FEETECH FS90R Micro Continuous Rotation Servo

The FS90R micro servo by FEETECH is designed for continuous rotation, offering a compact solution for robotics enthusiasts. Operating at 6 V, it achieves a rotation speed of approximately 130 RPM with no load and delivers up to 1.5 kg-cm of torque. This servo is easily controlled via a single microcontroller I/O line, making it ideal for beginners looking to build simple, yet effective, rolling robots.

Perfect for small-scale robotics projects, the FS90R can be paired with wheels to create a mobile platform. Its ability to convert standard RC servo position pulses into continuous rotation speed allows for versatile applications. The servo's rest position is set at a 1.5 ms pulse width but can be fine-tuned using the middle-point adjustment potentiometer. Adjusting the pulse width above or below this point controls the direction and speed of rotation, offering precise control over your project's movement.

Included with the servo is a 250 mm lead terminated with a JR-style connector, along with various servo horns and mounting hardware, providing everything needed for quick integration into your project. This micro servo is compatible with Pololu's servo wheels, making it easy to add mobility to your designs.

When compared to other continuous rotation servos, the FS90R stands out for its lightweight and compact size, measuring 22.5 × 12.1 × 23.4 mm. This makes it a suitable choice for projects where space and weight are critical considerations. However, it is important to avoid stalling or back-driving the servo to prevent potential damage, a common precaution with most hobby servos.

For those interested in exploring different configurations, the FS90R's compatibility with Pololu's range of servo controllers ensures that even more complex control schemes can be implemented with ease. Whether you're building a simple robot or a more advanced system, this servo provides a reliable and flexible option for continuous rotation applications.