Micro SERVO motor 360 degree FS90R
Micro SERVO motor 360 degree FS90R
Micro SERVO motor 360 degree FS90R
Micro SERVO motor 360 degree FS90R
Micro SERVO motor 360 degree FS90R
Micro SERVO motor 360 degree FS90R

Micro SERVO motor 360 degree FS90R

Motors
MOT465
Part.No: FS90R
€10.90
In Stock
Immediate Dispatch
The FS90R is a continuous rotation micro servo motor by FEETECH, offering 360° open-loop speed and direction control via PWM signal. Compact (9 g) and compatible with Arduino, Raspberry Pi, and any 5V PWM output. Ideal for robotics, wheeled robots, and automation projects.

 

The FEETECH FS90R is a continuous rotation micro servo motor designed for applications that require unlimited 360° rotational movement — unlike standard servos that rotate to a fixed position. Instead of controlling angle, the FS90R uses a standard PWM signal to set speed and direction, making it perfect for driving wheels, conveyors, or any mechanism that needs controlled continuous motion. Its compact size (9 g) and wide voltage range (4.8 V – 6 V) make it a go-to choice for makers building small robots, automated systems, and RC projects.

Key Features

  • Continuous 360° Rotation: Modified internal gearing removes the mechanical stop, enabling unlimited rotational movement — ideal for wheel drive and conveyor mechanisms.
  • PWM Speed & Direction Control: A 1500 µs pulse = STOP; pulses below 1500 µs = CW rotation (faster as pulse decreases); pulses above 1500 µs = CCW rotation (faster as pulse increases). Full compatibility with the Arduino Servo library.
  • Wide Operating Voltage (4.8 V – 6 V): Works directly with 5 V Arduino power rails; control signal is also compatible with 3.3 V logic (ESP32, Raspberry Pi).
  • Operating Speed: 110 RPM at 4.8 V / 130 RPM at 6 V — sufficient torque for small wheeled robots and light-load mechanisms.
  • Stall Torque: 1.3 kg·cm at 4.8 V / 1.5 kg·cm at 6 V — suitable for lightweight drivetrain applications.
  • Standard JR-style Connector: 20 cm cable with a universal 3-pin connector compatible with most servo headers and PWM breakout boards.
  • Lightweight & Compact: Only 9 g servo weight; fits easily into tight chassis designs and mini-robot frames.
  • Plastic Gears: Sufficient for light-duty continuous rotation tasks; reduces overall weight compared to metal-gear alternatives.

Pinout & Wiring

Wire ColorSignalDescription
Brown / BlackGNDGround — connect to GND of your microcontroller/power supply
RedVCCPower supply — connect to 4.8 V – 6 V (e.g., 5 V rail)
Orange / YellowPWM SignalControl signal — connect to any PWM-capable digital pin (e.g., D9 on Arduino UNO)

Wiring note: Connect Brown → GND, Red → 5V, Orange → D9 (or any PWM pin). In your Arduino sketch, use myServo.write(90) to stop, myServo.write(0) for full CW, and myServo.write(180) for full CCW. For precise stopping, fine-tune the pulse width around 1500 µs using myServo.writeMicroseconds(1500).

Compatibility

  • Arduino UNO / Nano / Mega: Fully compatible — 5 V power, 5 V PWM signal. Use the built-in Servo library directly.
  • ESP32 / ESP8266: Compatible — power from 5 V, control signal from 3.3 V GPIO (FS90R accepts 3.3 V control signals).
  • Raspberry Pi: Compatible via GPIO PWM (3.3 V signal level supported); power servo separately from a 5 V supply.
  • Micro:bit / STM32 / any PWM-capable MCU: Compatible provided PWM signal is within 900 – 2100 µs pulse range.

Typical Applications

  • Wheel drive for small wheeled robots and sumo robots
  • Continuous conveyor belt mechanisms in automation prototypes
  • Camera pan/tilt systems requiring continuous rotation on one axis
  • RC vehicle drivetrain with Arduino or ESP32 control
  • Feeder mechanisms in DIY CNC or 3D printer add-ons
  • Educational robotics kits requiring simple speed control

Technical Specifications

ParameterValue
Control InterfaceAnalog PWM (900 – 2100 µs)
Stop Pulse Width1500 µs (±5 µs dead band: 10 µs)
CW Rotation Range900 – 1495 µs
CCW Rotation Range1505 – 2100 µs
Operating Voltage4.8 V – 6 V
Control Signal Voltage3.3 V or 5 V compatible
Operating Speed110 RPM @ 4.8 V / 130 RPM @ 6 V
Stall Torque1.3 kg·cm @ 4.8 V / 1.5 kg·cm @ 6 V
RotationContinuous 360°
Gear TypePlastic
Bearing TypeNone
Cable Length20 cm
Connector TypeStandard JR-style 3-pin servo connector
Dimensions23.2 × 12.5 × 22 mm
Weight (servo only)9 g
BrandFEETECH
MPNFS90R

FAQ

Q: How do I stop the FS90R completely?
A: Send a PWM pulse of exactly 1500 µs — use myServo.writeMicroseconds(1500) in Arduino. Due to manufacturing tolerances, the true stop point may vary slightly (±5 µs); you may need to calibrate the exact neutral pulse for your specific unit.

Q: Can I use the FS90R as a regular positional servo?
A: No. The FS90R is a continuous rotation servo — its internal potentiometer has been modified so it no longer provides positional feedback. It only controls speed and direction, not angular position.

Package includes: 1× FEETECH FS90R Continuous Rotation Micro Servo with 20 cm cable and standard JR-style connector. Servo horns and mounting screws may be included depending on batch — verify upon receipt.

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