The N20 Gear Motor with Hall Sensor Encoder is a high-precision, low-voltage power solution designed for advanced micro-robotics and IoT devices. This specific 3V 300RPM variant is optimized for systems running on a single Li-ion cell or two AA batteries, providing a brisk rotational speed combined with dual-channel magnetic feedback for precise speed and position tracking.

Specifications

• Rated Voltage: 3V DC (Operating range: 1.5V – 6V).
• No-Load Speed: 300 RPM (at 3V).
• Shaft Type: D-shape (flat side for non-slip mounting).
• Shaft Diameter: 3mm.
• Shaft Length: 10mm.
• Gearbox: Full Metal (Brass and steel).
• Encoder Type: Dual-channel Hall Effect magnetic encoder.
• Encoder Resolution: Typically 7 Pulses Per Revolution (PPR) of the motor shaft.

Features

• Intelligent Feedback: The integrated magnetic encoder allows a microcontroller to monitor the exact position, speed, and direction of the motor, enabling "closed-loop" control.
• Quadrature Output: Provides two pulse signals (Phase A and Phase B). By analysing the lead/lag relationship between these signals, the controller can determine if the motor is spinning clockwise or counter-clockwise.
• Low Voltage Efficiency: Specifically tuned to reach its rated 300 RPM at just 3V, making it ideal for extremely compact, battery-powered gadgets.
• Rugged Construction: Features a precision-cut metal gear train that offers far superior durability and impact resistance compared to plastic gear motors.

Pin Configuration (6-Pin Connector)

1. Motor +: Motor Power (Positive).
2. Motor -: Motor Power (Negative).
3. Encoder GND: Ground for the Hall sensor.
4. Encoder VCC: Power for the Hall sensor (Regulated 3.3V – 5V).
5. Signal A (C1): Phase A Output Pulse.
6. Signal B (C2): Phase B Output Pulse.

Common Applications

• Precision Micro-Robotics: Small rovers requiring odometry to track distance travelled or pathing.
• Self-Balancing Mini-Bots: Using real-time feedback to maintain stability and adjust motor speed instantly.
• Smart Home Hardware: Automated locks or window blind systems that need to "know" when they have reached the fully open or closed position.
• Surgical & Lab Tools: Powering miniature pumps or stirrers that require constant, monitored RPM regardless of load changes.

Usage Tips

• Clean Power for Sensors: Always power the encoder (VCC/GND) from a stable, regulated logic supply. Connecting the encoder directly to the motor's power source can introduce electrical noise, leading to "ghost" pulses or sensor damage.
• Interrupt Pins: To avoid missing pulses at high speeds, connect Signal A and Signal B to the External Interrupt pins of your microcontroller (e.g., Pins 2 and 3 on an Arduino).
• Resolution Calculation: The final resolution at the output shaft is the encoder PPR multiplied by the gearbox reduction ratio.
• Wiring Care: The 6-pin JST connector is delicate. Ensure the cable is secured with strain relief to prevent the small PCB-mounted pins from breaking during robotic movement.