Pololu 2515 / 2516 / 2517 / 2518 Dual G2 High-Power Motor Driver Shield for Arduino

The Pololu Dual G2 High-Power Motor Driver Shield is a stackable Arduino shield that enables independent control of two high-current DC motors with integrated protection circuitry and advanced current sensing capabilities. Professional roboticists, autonomous vehicle developers, and industrial automation engineers rely on this shield to drive large brushed DC motors with currents up to 38A per channel while maintaining precise PWM speed control and directional management. This product solves the critical challenge of safely interfacing high-power motors to microcontroller boards without risking damage from back-EMF, overcurrent, or thermal runaway conditions.

Product Overview

The Pololu 2515, 2516, 2517, and 2518 Dual G2 Motor Driver Shields represent different current-rated versions of the same core architecture, utilizing advanced MOSFETs and integrated gate drivers to deliver efficient power transfer from your Arduino to demanding motor loads. The shield implements a full H-bridge topology for each motor channel, allowing independent forward, reverse, and speed control through standard Arduino PWM pins. The integrated current-sensing circuit provides real-time motor current feedback through analog inputs, enabling closed-loop control algorithms and overcurrent detection at the firmware level. Each variant is rated for different maximum continuous currents: the 2515 handles 18A, 2516 handles 24A, 2517 handles 30A, and 2518 handles 38A per channel, allowing you to select the appropriate model based on your motor specifications.

The shield features comprehensive protection mechanisms including reverse-polarity protection, overcurrent detection with automatic shutdown, thermal shutdown at 165 degrees Celsius, and integrated freewheeling diodes for safe motor deceleration. The compact form factor stacks directly onto Arduino Uno, Arduino Mega, and compatible boards without requiring external wiring, though all motor power connections use heavy-duty screw terminals rated for 6AWG wire. The onboard status LEDs provide real-time visual feedback of motor direction and fault conditions, while the integrated current-sense amplifier outputs a 0-5V analog signal proportional to motor current draw, enabling sophisticated power management and stall detection in your Arduino sketches.

Key Specifications

Specification	Details
Product Type	Dual Motor Driver Shield for Arduino
Brand	Pololu Robotics and Electronics
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Motor Channels	2 independent H-bridge channels
Maximum Continuous Current	2515: 18A, 2516: 24A, 2517: 30A, 2518: 38A per channel
Peak Current Rating	Up to 50A per channel (with adequate cooling)
Supply Voltage Range	5.5V to 30V DC motor supply
Logic Voltage	5V Arduino compatible
Current Sense Output	0-5V analog feedback proportional to motor current
PWM Frequency	20kHz for silent operation and efficiency
Thermal Shutdown	165 degrees Celsius automatic protection
Motor Connectors	Screw terminals rated for 6AWG wire

Key Features

• Independent dual motor control with full H-bridge topology enabling forward, reverse, and variable speed operation for each motor channel simultaneously
• Integrated current sensing with 0-5V analog output for real-time motor current monitoring and closed-loop control implementation in Arduino firmware
• Advanced protection circuitry including reverse-polarity protection, overcurrent detection with automatic shutdown, and thermal shutdown at 165 degrees Celsius
• 20kHz PWM frequency ensuring silent motor operation with minimal audible noise and electromagnetic interference in sensitive applications
• Stackable Arduino shield form factor with direct pin compatibility for Uno, Mega, and compatible boards, eliminating external wiring complexity
• Heavy-duty screw terminals rated for 6AWG wire supporting motor supply voltages from 5.5V to 30V DC
• Status LEDs providing real-time visual indication of motor direction and fault conditions for debugging and monitoring
• Integrated freewheeling diodes preventing back-EMF damage during rapid motor deceleration and direction reversal

Applications and Use Cases

• Autonomous mobile robots and wheeled platforms requiring independent left and right motor drive control with current feedback for traction management and stall detection
• Industrial conveyor systems and material handling equipment where dual motor synchronization and current monitoring enable load balancing and fault detection
• Robotic arm actuators and multi-axis motion platforms using this shield to drive shoulder, elbow, and wrist motors with coordinated PWM control from Arduino microcontrollers
• Electric vehicle prototypes and go-kart projects requiring high-current motor drive capability with thermal protection and real-time power consumption monitoring
• Agricultural automation equipment including automated irrigation pumps and crop processing machinery controlled through Arduino-based supervisory systems
• Hobby robotics competitions such as FIRST Robotics and Sumo robot competitions where dual high-power motor control is essential for competitive performance

How to Use

Installation begins by stacking the Pololu Dual G2 Motor Driver Shield directly onto your Arduino board, ensuring all pins align properly with the female headers. Connect your motor power supply (5.5V to 30V DC) to the labeled power screw terminals on the shield, observing correct polarity as reverse-polarity protection will prevent damage but the shield will not function. Connect your two DC motors to the motor output screw terminals, ensuring secure connections by tightening the terminal screws with a small screwdriver until the wire is firmly gripped. The shield automatically uses Arduino pins D3, D6, D9, and D12 for PWM speed control and direction signals, while analog pins A0 and A1 provide real-time current feedback from each motor channel.

In your Arduino sketch, configure pins D3, D6, D9, and D12 as outputs and use analogWrite() to set motor speeds from 0-255 for each channel. Use digitalWrite() to set the direction pins for forward and reverse operation. Monitor the current-sense analog inputs (A0 and A1) using analogRead() to implement stall detection by checking if current exceeds expected values for your motor load. The shield includes comprehensive example code in the Pololu Arduino libraries, available through the Arduino IDE library manager, which demonstrates dual motor control, current monitoring, and fault handling patterns suitable for most robotics applications.

Frequently Asked Questions

What is the difference between Pololu 2515, 2516, 2517, and 2518 models?

The primary difference is the maximum continuous current rating per channel: the 2515 is rated for 18A continuous, the 2516 for 24A continuous, the 2517 for 30A continuous, and the 2518 for 38A continuous. All models use identical pinouts and are software-compatible with the same Arduino libraries. Select your model based on your motor specifications and expected current draw. Higher-rated models include enhanced heat dissipation features and larger MOSFETs to handle sustained high-current operation without thermal shutdown.

Can I use this shield with motors rated at different voltages?

Yes, the Pololu Dual G2 supports motor supply voltages from 5.5V to 30V DC. You can connect a single power supply to drive both motors, or use separate regulated supplies for each motor pair if your application requires different voltage levels. The Arduino logic voltage remains 5V regardless of motor supply voltage. Ensure your power supply can deliver sufficient current for both motors operating simultaneously at maximum load, typically requiring a supply rated for at least 1.5 times the combined peak motor current.

How do I implement closed-loop motor control using the current-sense output?

The current-sense analog outputs on pins A0 and A1 provide 0-5V signals proportional to motor current. Read these values using analogRead() in your Arduino sketch and implement PID control algorithms that adjust PWM output based on sensed current. For stall detection, set a current threshold above your expected normal operating current and trigger corrective actions when exceeded. The Pololu Arduino libraries include example sketches demonstrating current-based speed control and stall detection patterns you can adapt to your specific application requirements.

What happens if my motors draw more current than the shield is rated for?

The shield includes integrated overcurrent protection that automatically shuts down the affected motor channel when current exceeds safe limits, typically around 1.5 times the continuous rating. This protection activates within microseconds and prevents damage to the MOSFETs and Arduino board. Additionally, thermal shutdown activates at 165 degrees Celsius if the shield overheats from sustained overcurrent conditions. If overcurrent shutdowns occur frequently, your motors likely exceed the shield's capability and you should upgrade to a higher-rated model or reduce motor load.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

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