DFRobot
Gravity: DC Micro Metal Gear Motor w/Driver - 75:1
A compact DC micro metal gear motor with a built-in driver that uses the DFRobot Gravity 3-pin interface. Simply connect to a microcontroller and control dir...
A compact DC micro metal gear motor with a built-in driver that uses the DFRobot Gravity 3-pin interface. Simply connect to a microcontroller and control direction and speed with a single PWM signal — no external H-bridge required.
The embedded driver accepts standard servo-style PPM signals, so you can use the Arduino Servo library to control forward/reverse direction and speed. The motor features a 75:1 gear reduction ratio and draws less than 1 mA in standby when no control signal is present.
Key Features
- Built-In Driver – No external H-bridge needed, single signal control
- Gravity 3-Pin Interface – Simple plug-and-play connection
- 75:1 Gear Ratio – High torque from a compact motor
- Forward/Reverse Control – Via PPM pulse width
- Speed Control via PWM – Variable speed in both directions
- Low Standby Current – Less than 1 mA without signal input
- Arduino Servo Library Compatible – Supports up to 12 motors on most boards, 48 on Mega
Specifications
- Operating Voltage: 3.5–8 V
- Reduction Ratio: 75:1
- No-Load Current: ~40 mA @ 6 V
- Static Current: < 1 mA (no signal)
- Interface: Gravity 3-Pin
- PPM Signal Resolution: 1 µs
- PPM Pulse Width Range: 500–2500 µs
- Clockwise: 500–1400 µs (500 µs = max speed)
- Stop Range: 1400–1600 µs
- Anticlockwise: 1600–2500 µs (2500 µs = max speed)
- PWM Frequency: 500 Hz
Ideal For
- Small robotics and DIY motorised projects
- Beginners learning motor control
- Compact mechanisms requiring forward/reverse drive
Package Contents
- 1× DC Micro Metal Gear Motor w/Driver (75:1)
- 1× Gravity 3-Pin Cable
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- ppm
- ppm means parts per million, a common way to express very small gas concentrations in air. For CO₂ sensors, the ppm range tells you what levels the sensor can measure, such as normal indoor air through to poorly ventilated spaces.
- Pulse width range
- The span of control pulse lengths a servo understands, usually measured in microseconds. Matching this range in your code affects how far the servo moves and helps avoid commanding positions outside its intended travel.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- servo
- A servo is a motor with built-in position control, usually told to move to a specific angle by a control signal. It matters when you need repeatable movement, such as steering, arms, flaps, or linkages, rather than continuous spinning.
- Torque
- A twisting force that causes something to rotate, usually measured in newton-metres or kilogram-centimetres. It matters when choosing motors, servos, gears, and tools because higher torque is needed to lift heavier loads, turn larger wheels, or move mechanisms without stalling.
Find this product in
Brands
Robotics & Motion
DC Micro Metal Gear Motor with Driver Dimensions
Mechanical Drawings · 203.4 KB · Click any page to view full size
Supplier page — dfrobot.com
Supplier Description · 418.9 KB · Click any page to view full size
Related Tutorials
Free guides on learn.littlebird.com.au
