Product Overview
The FEETECH FS90R is a compact 9g continuous rotation micro servo designed for small robot vehicles, DIY robotics projects, educational platforms, and RC applications. Unlike standard positional servos, the FS90R supports continuous 360° rotation, making it suitable for wheel drive systems and mobile robot platforms.
With lightweight construction, compact dimensions, and low power consumption, the FS90R is widely used in mini robot cars, smart vehicles, STEM projects, and embedded control systems.
Key Features
- 360° continuous rotation servo
- Compact 9g micro servo design
- Suitable for robot wheel drive applications
- Analog control system
- Lightweight and easy to integrate
- Compatible with standard PWM servo signals
- Core motor structure
- Plastic gear transmission
- JR connector interface
- Ideal for Arduino, Raspberry Pi, ESP32, STM32, and DIY robotics projects
Technical Specifications
| Item | Specification |
|---|---|
| Model | FS90R |
| Servo Type | Continuous Rotation Micro Servo |
| Operating Voltage | 4V–7.4V |
| Rated Voltage Options | 4.8V / 6V |
| No Load Speed (4.8V) | 120 RPM |
| No Load Speed (6V) | 150 RPM |
| Running Current (4.8V) | 150mA |
| Running Current (6V) | 180mA |
| Stall Torque (4.8V) | 1.3 kg·cm |
| Stall Torque (6V) | 1.5 kg·cm |
| Stall Current (4.8V) | 600mA |
| Stall Current (6V) | 800mA |
| Idle Current | 5mA / 6mA |
| Rated Torque | 0.4 kg·cm / 0.5 kg·cm |
| Rated Current | 200mA / 250mA |
| Dead Band Width | ≤90 μsec |
| Neutral Position | 1500 μsec |
| Pulse Width Range | 1200–1800 μsec |
| Operating Travel | 360° Continuous Rotation |
| Gear Material | POM |
| Bearing Type | No Bearing |
| Motor Type | Core Motor |
| Gear Ratio | 1/263 |
| Cable Length | 25cm |
| Connector Type | JR |
| Weight | 10 ± 1g |
| Dimensions | 22.5 × 12 × 27.7 mm |
| Operating Temperature | -10°C to 60°C |
| Storage Temperature | -30°C to 80°C |
Mechanical Specifications
| Item | Specification |
|---|---|
| Horn Type | 21T / 4.86mm |
| Backlash | ≤2.0° |
| Rocker Phantom | 0° |
| Output Rocker Screw | PB2.0×4 |
| Cable Definition | Signal / VCC / GND |
Package Includes
- 1 × FEETECH FS90R Continuous Rotation Servo
- Servo horns and mounting accessories
- Mounting screws
Typical Applications
- Mini robot cars
- Smart vehicle wheel drive
- DIY robotics projects
- Arduino robot platforms
- STEM education kits
- RC electronic projects
- Small mobile robots
- Experimental automation systems
Why Choose the FEETECH FS90R?
The FS90R combines compact size, lightweight construction, and continuous rotation capability in a reliable micro servo platform. Its compatibility with standard servo PWM control makes it easy to integrate into robotics and embedded systems while providing smooth wheel-drive performance for compact robotic applications.
