3.7g Micro Servo Motor

The 3.7g Micro Servo Motor is a remarkably compact and lightweight actuator, making it an essential component for projects where size and mass are critical factors. Despite its tiny footprint, this servo delivers reliable and precise motion control, perfect for driving small linkages or controlling mechanisms with great accuracy. Hobbyists and engineers commonly select this micro servo for its simple three-wire interface, which allows for direct connection and easy control using PWM (Pulse Width Modulation) signals from microcontrollers like Arduino or Raspberry Pi. Its featherlight weight, often around 3.7 grams, makes it the standard choice for small RC aircraft, miniature robotics, and delicate prototyping work.

Key Features:

• Ultra-Lightweight Design: Weighing only around 3.7g, this servo adds minimal mass to your aerial or miniature projects, maximizing efficiency.
• High Precision Control: Offers excellent positioning accuracy, allowing you to achieve fine movements in delicate mechanical assemblies.
• Three-Wire Interface: Features a standard signal (orange), power (red), and ground (brown) connection, simplifying wiring to any standard microcontroller.
• Fast Response Time: The small motor and gearing ensure a quick reaction to changes in the PWM control signal.
• Standard PWM Control: You can easily control the servo’s angle using the Pulse Width Modulation output available on almost all development boards.
• Complete Accessory Kit: Ships with various servo horns and mounting screws, providing versatile options for coupling with your mechanism.

Technical Specifications:

• Operating Voltage: 4.2V to 6V DC (typically 4.8V recommended)
• Stall Torque (4.8V): Approximately 0.45 kg·cm (4.4 N·cm)
• Operating Speed (4.8V): Approximately 0.10 sec/60 degrees
• Rotation Angle: 180° (typically 90° left and 90° right from center)
• Gear Material: Plastic
• Type: Analog Servo

Mechanical Specifications:

• Case Material: Engineering Plastic
• Connector Type: Standard Futaba/JR plug (often with a white or clear connector)
• Weight: Approximately 3.7 grams (excluding accessories)
• Motor Type: Coreless DC Motor

Dimensions:

• Length: 20.0 mm
• Width: 8.7 mm
• Height: 22.1 mm

Pinout and Wiring:

• Brown Wire (GND): Connect this wire to the common ground of your power supply and microcontroller.
• Red Wire (VCC): Supply the power voltage (4.2V-6V). Ensure your power source can handle the current draw under load.
• Orange Wire (SIGNAL/PWM): Connect this to a digital pin on your microcontroller that supports PWM output (e.g., a PWM pin on Arduino).
• Wiring Note: Always power the servo from a separate, dedicated power supply or a robust voltage regulator, as drawing high current directly from the microcontroller can cause instability.

Datasheet Reference:

• Download Datasheet (Manufacturer Specific)

Commonly Used in:

• Small Scale RC Models: Ideal for controlling ailerons, elevators, or rudders in micro remote-controlled planes and gliders.
• Educational Robotics: A great choice for driving lightweight joints and manipulators on small robots for learning platforms.
• Wearable Tech Prototypes: Integrate into compact devices where movement is required without excessive bulk.

Applications:

• Camera Gimbal Control: Use it to pan and tilt small camera modules on mini drones or surveillance systems.
• Miniature Grabbers/Claws: Power the opening and closing mechanism of a small robotic gripper arm.
• Actuating Switches/Levers: Provide precise, remote activation of small mechanical switches or levers in a compact space.

Equivalent Models:

• SG90 Micro Servo: A slightly larger, extremely popular, and readily available servo (usually 9g), offering slightly more torque.
• Linear Actuators (Micro): Alternative for projects requiring straight-line motion over rotational motion.

Package Includes:

• 1 x 3.7g Micro Servo Motor
• 1 x Set of Servo Horns and Mounting Hardware