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3V Digital Micro Servo, Continuous Rotation (FT90R)

  • 900-00030: FT90R Digital Mini 3.3V Continuous Rotation Servo - with accessories
  • 900-00030: FT90R Digital Mini 3.3V Continuous Rotation Servo - side view
  • 900-00030: FT90R Digital Mini 3.3V Continuous Rotation Servo - alternate view
Product ID: 900-00030
In Stock: 308
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Do you need little continuous rotation servos for a little project? Try this compact, lightweight servo that requires only 3V to operate.

It is an ideal servo motor for micro:bit GO bundle projects paired with our I/O adapter to bring both micro:bit control signals and direct battery current right to a breadboard. A 3-pin single-row header, available separately, will come in handy for connecting this servo to a breadboard.

Control this servo with PWM (pulse width modulation) signals.  Pulses in the 700-1500 µs range turn it clockwise; pulses in the 1500-2300 µs range turn it counterclockwise, 1500 µs will make it stop.  Need wheels? The Wheel/Tire for 3V Micro CR Servo (FT90R) presses right on to this servo's spline, just secure it with the included screw. Pick up a pair for your home made tiny robot project!


  • Operates at just 3V, ideal for two 1.5V batteries
  • Easy to control with simple PWM (pulse-width modulation) signals
  • Rotates continuously clockwise & counterclockwise
  • Set of servo horns is included
  • Accepts the Wheel/Tire for FT90R Mini CR Servo


  • Animating mechanical props
  • Tiny home-made robots

Note: if you are looking for a tiny standard servo to turn to and hold a position, try the 3V Digital Micro Servo, Standard (FT90B).



    • Operating voltage: 3V to 4.8V DC
    • Communication: PWM, 700-2300 µs
    • Stop position: 1500 +/- 45 µs
    • No-load speed: 62.5 RPM @ 3V, 110 RPM @ 4.8V
    • No-load current: 75mA @ 3V, 100 mA @ 4.8V
    • Idle current: 4 mA @ 3V, 5 mA @ 4.8V
    • Stall current: 400 mA @ 3V, 550 mA @ 4.8V
    • Torque: 1.0 kg-cm (13.9 oz-in) @3V, 1.3 kg-cm (18.1 oz-in) @ 4.8V
    • Operating temp range: +5 to +158  (-15 to +70 °C)
    • Gear material: Nylon/POM
    • Spline: 21 T, 4.8 mm
    • Dimensions: 32.3 x 12.1 x 30.7 mm
    • Weight: 9 g