Gravity 290RPM 75:1 Micro Gear Motor with PWM Driver

The Gravity micro gear motor from DFRobot combines a small N20 gear motor with metal gearbox and a built-in driver. It is controlled via a single signal line like a continuous rotation servo: the pulse width sets direction and speed, no H-bridge is needed. This motor has a 75:1 gearbox and runs at 290 rpm without load. It connects via the 3-pin Gravity interface and is programmed with the Servo library of the Arduino IDE.

Same design with a different ratio: Gravity 133RPM 150:1 Micro Gear Motor with PWM Driver, Gravity 440RPM 50:1 Micro Gear Motor with PWM Driver, Gravity 730RPM 30:1 Micro Gear Motor with PWM Driver

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• Gravity IO Expansion Shield for Arduino V7.1
• Dupont Cables M-M 10cm 20 Pieces

Features:

• N20 gear motor with metal gearbox and built-in driver
• Controlled by one signal like a continuous rotation servo, direction and speed via the pulse width
• Stop at a pulse width of 1400 µs to 1600 µs, full speed at 500 µs and 2500 µs
• Servo library of the Arduino IDE: according to DFRobot up to 12 motors on most Arduino boards, up to 48 on the Arduino Mega
• Quiescent current below 1 mA without control signal
• The driver uses a small part of the voltage, so the motor turns slightly slower than the rated speed (DFRobot)
• Gravity 3-pin connector: signal, VCC, GND

Application Examples:

• Drive for small robots and vehicles
• Moving mechanics in models
• Valves and locks
• Teaching and experiments with motors

Documentation:

• Wiki DFRobot DFR0399
• Dimension drawing (PDF)
• Selection guide N20 motors with driver (DFRobot)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: DFR0399
• Gearbox: 75:1
• No-load speed: 290 rpm
• Stall torque: 0.8 kg·cm
• Operating voltage: 3.5 V to 8 V (product page and wiki, the selection guide states 3 V to 6 V)
• Rated voltage: 6 V
• No-load current: approx. 40 mA at 6 V
• Stall current: 1000 mA
• Quiescent current without control signal: below 1 mA
• Control signal: PWM 500 Hz, pulse width 500 µs to 2500 µs, resolution 1 µs
• Pulse width one direction (clockwise): 500 µs to 1300 µs
• Pulse width stop: 1400 µs to 1600 µs
• Pulse width other direction (anticlockwise): 1700 µs to 2500 µs
• Interface: Gravity 3-pin (signal, VCC, GND)
• Dimensions: 40 × 12 × 20 mm
• Weight: 10 g

Scope of Delivery:

• 1× Gravity 290 rpm 75:1 micro gear motor with driver
• 1× Gravity cable 3-pin