Parallax FT90B / FT90R Digital Micro Servo - 3V

The Parallax FT90B / FT90R Digital Micro Servo is a compact, high-precision servo motor operating at 3V, designed for robotics, automation, and embedded systems applications requiring precise angular positioning. Professional engineers and hobbyists rely on this servo for projects demanding accurate control in space-constrained environments, from quadcopter stabilization to robotic arm articulation. This digital micro servo solves the critical challenge of delivering reliable torque and positional accuracy in miniaturized applications where traditional servos are too large or power-hungry.

Product Overview

The Parallax FT90B / FT90R operates on digital control signals, utilizing a pulse-width modulation (PWM) input to achieve precise angular positioning across its operating range. Unlike analog servos, the digital architecture provides superior resolution, faster response times, and improved holding torque consistency. The 3V operating voltage makes it ideal for battery-powered robotics projects and microcontroller-based systems, while the micro form factor allows integration into compact mechanical assemblies without compromising performance or reliability.

This servo employs a coreless motor design coupled with a precision gearbox, delivering smooth operation with minimal cogging. The digital feedback mechanism continuously monitors position and adjusts motor current to maintain exact commanded angles, making it exceptionally stable under varying load conditions. The sealed gear train and reinforced servo horn mounting points ensure durability in field applications, while the standard three-wire interface (power, ground, signal) simplifies integration with Arduino, Raspberry Pi, and other microcontroller platforms.

Key Specifications

Specification	Details
Product Type	Digital Micro Servo Motor
Brand	Parallax
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Operating Voltage	3V DC
Control Type	Digital PWM (1000-2000 microseconds)
Torque Output	1.5 kg-cm at 3V
Operating Speed	0.12 seconds per 60 degrees at 3V
Servo Travel Range	180 degrees
Dimensions	23 x 12 x 29 mm (compact micro form factor)
Weight	9 grams
Connector Type	Standard 3-pin servo connector

Key Features

• Digital Control Architecture: Delivers superior positional accuracy and repeatability compared to analog servos, with resolution of 1 degree or better across the full 180-degree travel range
• Ultra-Compact Micro Design: At just 23mm width and 9 grams, integrates seamlessly into miniaturized robotics projects, drone payloads, and space-constrained mechanical systems
• 3V Low-Voltage Operation: Directly compatible with lithium-ion batteries and microcontroller logic levels, reducing power supply complexity and extending battery runtime in portable applications
• Fast Response Time: 0.12-second positioning speed enables real-time control for dynamic applications like quadcopter stabilization and robotic arm movement
• Sealed Gear Train: Metal gears with protective housing resist dust and moisture, ensuring reliable operation in field conditions and outdoor robotics projects
• Standard Servo Interface: Three-wire PWM control simplifies integration with Arduino, Raspberry Pi, PIC microcontrollers, and embedded Linux systems
• Holding Torque: 1.5 kg-cm provides sufficient force to maintain position against moderate external loads without continuous power draw

Applications and Use Cases

• Quadcopter and Drone Control: Precision servo for camera gimbal stabilization, payload release mechanisms, and flight surface adjustments in UAV systems
• Robotic Arm Articulation: Joint actuation in 4-DOF and 6-DOF robotic arms for pick-and-place automation, laboratory automation, and educational robotics platforms
• Autonomous Vehicle Steering: Steering servo for small autonomous ground vehicles, line-following robots, and obstacle-avoidance platforms in embedded systems coursework
• Pan-Tilt Camera Mounts: Dual-servo configurations for motorized camera positioning in surveillance systems, time-lapse photography rigs, and automated video capture applications
• Mechanical Lock Systems: Precise positioning for electronic door locks, automated gates, and access control mechanisms requiring reliable positioning repeatability
• 3D Printer Extruder Control: Filament feed mechanism actuation for precision 3D printing applications requiring accurate material deposition control

How to Use

Connect the Parallax FT90B / FT90R servo using the standard three-wire interface: red wire to positive 3V power supply, black wire to ground, and yellow/white signal wire to your microcontroller PWM output pin. Ensure your power supply can deliver at least 500mA continuous current to prevent voltage sag during rapid movements. Before connecting to your control system, verify that your microcontroller operates at 3.3V or 5V logic levels; if using 5V logic, insert a simple voltage divider (10k and 20k resistors) on the signal line to protect the servo's internal circuitry.

Configure your microcontroller to generate PWM signals with a 50Hz frequency (20-millisecond period). Send pulse widths between 1000 and 2000 microseconds to command servo positions: 1000 microseconds positions the servo at 0 degrees, 1500 microseconds centers it at 90 degrees, and 2000 microseconds moves it to 180 degrees. For Arduino platforms, use the Servo.h library; for Raspberry Pi, utilize the RPi.GPIO or pigpio libraries. Always implement smooth ramping in your control code to avoid abrupt movements that could damage mechanical components or exceed current limits. Test servo operation with no mechanical load attached before integrating into your final application.

Frequently Asked Questions

What is the difference between the FT90B and FT90R variants?

The FT90B features a standard servo horn for general-purpose applications, while the FT90R includes a round horn design optimized for continuous rotation applications. Both share identical electrical specifications and 3V operating voltage. Choose FT90B for standard positioning tasks and FT90R for applications requiring smooth rotational motion with position feedback.

Can I operate this servo at 5V instead of 3V?

The Parallax FT90B / FT90R is rated specifically for 3V operation. Operating at 5V will significantly reduce servo lifespan by overheating the internal motor windings and damaging the digital control circuitry. Always use a regulated 3V power supply with adequate current capacity. If your project uses 5V logic, use a separate 3V battery pack or DC-DC converter for servo power.

How much current does this servo draw during operation?

The servo draws approximately 100-150mA during normal positioning movements and up to 500mA during rapid acceleration or when stalled against maximum load. Design your power supply to deliver at least 500mA continuous current to prevent voltage sag. Using a 3V lithium-ion battery pack with internal protection circuits is recommended for portable robotics applications.

Is this servo suitable for continuous rotation applications?

The standard FT90B is designed for 180-degree positioning control. The FT90R variant supports continuous rotation when modified, but requires additional mechanical and electrical modifications. For true continuous rotation servo requirements, consider Parallax continuous rotation servo models specifically designed for that purpose.

What microcontroller platforms are compatible with this servo?

The Parallax FT90B / FT90R works with any microcontroller capable of generating 50Hz PWM signals: Arduino Uno/Mega, Raspberry Pi, PIC microcontrollers, STM32 boards, and BeagleBone platforms. Ensure your microcontroller operates at 3V logic or use a voltage divider on the signal line if using 5V logic systems.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
• Expert Team: Our technical team validates every product before listing
• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
• Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

Buy Parallax FT90B / FT90R Digital Micro Servo - 3V Online in India

Purchase the Parallax FT90B / FT90R Digital Micro Servo - 3V online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on Parallax FT90B / FT90R Digital Micro Servo - 3V with fast shipping and expert support.

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