SG90 9g Micro Servo Motor with Horns and Screws Kit for RC Airplane
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৳ 120.00৳ 150.00 (-20%)
The SG90 9g Micro Servo Motor is a lightweight, high-torque miniature actuator designed for precise angular positioning in robotics and remote-control models. Operating on a 4.8V to 6V DC supply, this popular 180-degree servo features durable internal nylon gears housed in a compact translucent blue casing. It includes a 3-pin connector cable (
PWM Signal, VCC, GND) for effortless plug-and-play integration with microcontrollers like Arduino, Raspberry Pi, and RC receivers. The package comes complete with three interchangeable plastic horn arms and mounting screws, making it an essential component for robotic arms, steering mechanisms, pan-and-tilt assemblies, and RC airplanes.Product Overview
The SG90 9g Micro Servo Motor is a lightweight, industry-standard miniature actuator engineered to deliver precise, closed-loop angular positioning for small-scale mechanisms. Weighing a mere 9 grams, this high-efficiency servo combines a miniature DC core motor, an internal reduction gear train, a position-sensing potentiometer, and an integrated control circuit board inside a compact, translucent blue polymer housing. It serves as an essential mechanical muscle block for microcontrollers, allowing automated hardware to rotate smoothly to specific angles rather than spinning uncontrollably.
Internal Mechanical Engineering & Gear Train
Despite its tiny physical profile, the SG90 is optimized to maximize output torque while maintaining low power consumption:
- High-Efficiency Nylon Gears: The internal gear train features custom-molded, high-strength nylon gears that provide quiet mechanical rotation, smooth tooth engagement, and reduced internal friction without requiring greasy lubrication.
- Closed-Loop Feedback System: An internal high-stability potentiometer is linked directly to the main output shaft. This configuration allows the onboard control board to continuously read the exact mechanical position of the shaft and automatically correct for external resistance or deflection.
- 180-Degree Rotation Window: The motor is physically and electronically calibrated to sweep across a wide 180° arc (90 degrees in each direction from center), providing a highly controllable range of movement for localized mechanical adjustments.
Electrical Interface & Color-Coded Harness
The servo communicates using standard Pulse Width Modulation (PWM) signals through a pre-wired, flexible 3-wire ribbon cable terminating in a standard 2.54mm pitch female header plug:
- Brown Wire (
GND): System common ground connection pad. - Red Wire (
VCC): Main positive power line input (accepts standard 4.8V to 6V DC rails). - Orange Wire (
PWM Signal): Dedicated data line that receives positional command pulses from your host microcontroller or RC receiver.
Complete Mounting & Horn Accessory Kit
To support immediate mechanical deployment across various frame configurations, each servo unit comes bundled with essential hard hardware accessories:
- Single-Arm Horn: Ideal for simple push-pull linkages, steering columns, or linear mechanical rods.
- Dual-Arm (Cross) Horn: Perfect for balanced, dual-pull steering configurations or symmetrical joint rotation.
- Star / Four-Arm Horn: Designed to provide multi-directional attachment points for complex mechanical assemblies or pulleys.
- Mounting Hardware: Includes two pointed wood/plastic mounting screws to secure the servo tabs into a chassis, alongside a fine-threaded machine screw to lock your chosen horn arm firmly onto the top output splines.
Common Field Applications
- RC Airplanes & Helicopters: Actuating the control surfaces (flaps, ailerons, elevators, and rudders) on lightweight radio-controlled model aircraft.
- Smart Robot Cars & Walkers: Driving front-wheel steering mechanisms, steering sensor arrays, or acting as multi-joint hinges on miniature bipedal and quadrupedal walking robots.
- Pan-and-Tilt Sensor Mounts: Orienting ultrasonic sensors or miniature camera lenses smoothly to scan the immediate surroundings.
- STEM & Educational Robotics: Serving as the introductory component for students learning to program mechanical movements and angle-based loops on Arduinos and Raspberry Pis.
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