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Pololu 2512 A4990 Dual Motor Driver Shield for Arduino
The Pololu 2512 A4990 is a dual motor driver shield specifically designed for Arduino microcontroller boards, enabling precise control of two independent DC motors with PWM speed regulation and directional control. Roboticists, embedded systems engineers, and automation professionals rely on this shield to drive autonomous mobile robots, robotic arms, and wheeled platforms with reliable H-bridge motor control. This product solves the critical challenge of interfacing high-current motor loads with low-voltage Arduino GPIO pins while providing protection against back-EMF and shoot-through conditions.
Product Overview
The A4990 dual motor driver shield operates on the principle of H-bridge switching topology, allowing bidirectional control of two DC motors independently. Each channel features integrated MOSFETs capable of handling continuous currents up to 5A per motor, with peak current ratings of 10A, making it suitable for motors ranging from 3V to 30V DC. The shield stacks directly onto Arduino Uno, Arduino Mega, and compatible boards, eliminating breadboard clutter and providing a compact form factor for embedded robotics applications. The integrated current sensing on each channel enables real-time motor load monitoring, while the thermal shutdown protection prevents damage from overcurrent conditions.
What distinguishes the A4990 from generic motor drivers is its advanced protection circuitry including reverse polarity protection, over-temperature shutdown at 165°C, and integrated freewheeling diodes that suppress voltage spikes during motor deceleration. The shield communicates with Arduino through simple PWM pins (D3, D11 for speed control) and digital pins (D2, D4, D6, D12 for direction control), requiring minimal code complexity. This makes the A4990 ideal for educational robotics projects, competition-level robot development, and industrial prototyping where reliability and ease of integration are paramount.
Key Specifications
| Specification | Details |
| Product Type | Dual Motor Driver Shield for Arduino |
| Brand | Pololu |
| Model Number | 2512 |
| Motor Driver IC | A4990 |
| 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 |
| Continuous Current per Channel | 5A |
| Peak Current per Channel | 10A |
| Motor Voltage Range | 3V to 30V DC |
| Control Interface | PWM and Digital GPIO pins |
| Thermal Shutdown Temperature | 165°C |
| Dimensions | 68.6mm x 53.3mm |
| Weight | Approximately 15g |
Key Features
- Dual independent H-bridge channels with 5A continuous and 10A peak current capacity per motor for reliable high-torque motor control
- PWM speed control on both channels with Arduino pins D3 and D11 for smooth acceleration and deceleration profiles
- Directional control via digital pins D2, D4, D6, D12 enabling forward, reverse, and braking operations without code complexity
- Integrated current sensing on each channel for real-time motor load monitoring and fault detection in autonomous systems
- Over-temperature and over-current protection with automatic thermal shutdown at 165°C preventing permanent damage
- Reverse polarity protection and integrated freewheeling diodes suppressing back-EMF voltage spikes during motor switching
- Direct Arduino shield form factor with no soldering required, compatible with Arduino Uno, Mega, and clone boards
- Wide motor voltage range from 3V to 30V DC supporting everything from hobby motors to industrial-grade actuators
Applications and Use Cases
- Autonomous mobile robots and wheeled platforms requiring independent left and right motor control for differential drive locomotion
- Robotic arms and multi-axis manipulators where precise PWM-based speed regulation ensures smooth joint movements and payload control
- Line-following and maze-solving robots in educational competitions where reliable motor control is critical for performance
- Automated conveyor systems and industrial material handling equipment operating at 12V to 24V with current monitoring requirements
- Drone landing gear actuators and gimbal stabilization systems requiring bidirectional motor control with thermal protection
- Smart home automation projects including motorized curtains, gates, and door locks operating at variable voltages
How to Use
Installation of the Pololu 2512 A4990 shield is straightforward: align the shield's header pins with your Arduino board's pin headers and press firmly until fully seated. Connect your two DC motors to the OUT1-OUT2 terminals (Motor A) and OUT3-OUT4 terminals (Motor B), observing correct polarity. Supply motor power to the shield's power input (3V to 30V DC), ensuring your power supply can deliver the required current. In your Arduino sketch, configure pins D2, D3, D4, D6, D11, and D12 as outputs, then use digitalWrite() for directional control and analogWrite() for PWM speed control (0-255 range).
For optimal performance, implement current sensing by reading the analog feedback pins (A0 for Motor A, A1 for Motor B) to detect stalled motors or excessive loads. Always ensure your motor power supply is separate from the Arduino's USB power to prevent voltage drops that could reset the microcontroller. When operating motors above 12V, use appropriate connectors rated for the current draw and consider adding external capacitors (100µF to 470µF) across the motor power terminals to suppress voltage transients. Test your motor control in both directions at varying PWM values before deploying in production robotics applications.
Frequently Asked Questions
Can the A4990 shield handle motors drawing more than 5A continuously?
The A4990 is rated for 5A continuous current per channel, with 10A peak capacity for short durations. Motors exceeding 5A continuous draw will trigger thermal shutdown protection. For higher current applications, consider Pololu's higher-capacity drivers like the DRV8835 dual motor driver or implement parallel motor driver configurations with current distribution.
What is the difference between PWM pins and direction pins?
PWM pins (D3 and D11) control motor speed using pulse-width modulation from 0-255 (0% to 100% duty cycle). Direction pins (D2, D4, D6, D12) determine whether each motor rotates forward or backward. By combining PWM speed with direction control, you achieve full bidirectional speed regulation essential for mobile robotics and precision automation.
Can I use the A4990 with Arduino boards other than Uno?
Yes, the A4990 shield is compatible with Arduino Mega, Arduino Leonardo, and most Arduino-compatible boards with standard header pin spacing. However, verify that your specific board uses the same pin assignments (D2, D3, D4, D6, D11, D12) or modify your code accordingly. Some third-party boards may have different pin configurations requiring firmware adjustments.
How do I implement current sensing for motor load monitoring?
The A4990 provides current sensing outputs on analog pins A0 (Motor A) and A1 (Motor B). Use analogRead() in your Arduino sketch to read these pins, which output a voltage proportional to motor current. Typical output is 525mV per ampere of motor current, allowing you to detect stalled motors, implement current limiting, or trigger safety shutdowns when loads exceed safe thresholds.
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.
Why Buy from The Engineer Store
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy Pololu 2512 A4990 Dual Motor Driver Shield for Arduino Online in India
Purchase the Pololu 2512 A4990 Dual Motor Driver Shield for Arduino online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on Pololu 2512 A4990 Dual Motor Driver Shield for Arduino with fast shipping and expert support.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.
Pololu 2512 A4990 Dual Motor Driver Shield for Arduino
The Pololu 2512 A4990 is a dual motor driver shield specifically designed for Arduino microcontroller boards, enabling precise control of two independent DC motors with PWM speed regulation and directional control. Roboticists, embedded systems engineers, and automation professionals rely on this shield to drive autonomous mobile robots, robotic arms, and wheeled platforms with reliable H-bridge motor control. This product solves the critical challenge of interfacing high-current motor loads with low-voltage Arduino GPIO pins while providing protection against back-EMF and shoot-through conditions.
Product Overview
The A4990 dual motor driver shield operates on the principle of H-bridge switching topology, allowing bidirectional control of two DC motors independently. Each channel features integrated MOSFETs capable of handling continuous currents up to 5A per motor, with peak current ratings of 10A, making it suitable for motors ranging from 3V to 30V DC. The shield stacks directly onto Arduino Uno, Arduino Mega, and compatible boards, eliminating breadboard clutter and providing a compact form factor for embedded robotics applications. The integrated current sensing on each channel enables real-time motor load monitoring, while the thermal shutdown protection prevents damage from overcurrent conditions.
What distinguishes the A4990 from generic motor drivers is its advanced protection circuitry including reverse polarity protection, over-temperature shutdown at 165°C, and integrated freewheeling diodes that suppress voltage spikes during motor deceleration. The shield communicates with Arduino through simple PWM pins (D3, D11 for speed control) and digital pins (D2, D4, D6, D12 for direction control), requiring minimal code complexity. This makes the A4990 ideal for educational robotics projects, competition-level robot development, and industrial prototyping where reliability and ease of integration are paramount.
Key Specifications
| Specification | Details |
| Product Type | Dual Motor Driver Shield for Arduino |
| Brand | Pololu |
| Model Number | 2512 |
| Motor Driver IC | A4990 |
| 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 |
| Continuous Current per Channel | 5A |
| Peak Current per Channel | 10A |
| Motor Voltage Range | 3V to 30V DC |
| Control Interface | PWM and Digital GPIO pins |
| Thermal Shutdown Temperature | 165°C |
| Dimensions | 68.6mm x 53.3mm |
| Weight | Approximately 15g |
Key Features
- Dual independent H-bridge channels with 5A continuous and 10A peak current capacity per motor for reliable high-torque motor control
- PWM speed control on both channels with Arduino pins D3 and D11 for smooth acceleration and deceleration profiles
- Directional control via digital pins D2, D4, D6, D12 enabling forward, reverse, and braking operations without code complexity
- Integrated current sensing on each channel for real-time motor load monitoring and fault detection in autonomous systems
- Over-temperature and over-current protection with automatic thermal shutdown at 165°C preventing permanent damage
- Reverse polarity protection and integrated freewheeling diodes suppressing back-EMF voltage spikes during motor switching
- Direct Arduino shield form factor with no soldering required, compatible with Arduino Uno, Mega, and clone boards
- Wide motor voltage range from 3V to 30V DC supporting everything from hobby motors to industrial-grade actuators
Applications and Use Cases
- Autonomous mobile robots and wheeled platforms requiring independent left and right motor control for differential drive locomotion
- Robotic arms and multi-axis manipulators where precise PWM-based speed regulation ensures smooth joint movements and payload control
- Line-following and maze-solving robots in educational competitions where reliable motor control is critical for performance
- Automated conveyor systems and industrial material handling equipment operating at 12V to 24V with current monitoring requirements
- Drone landing gear actuators and gimbal stabilization systems requiring bidirectional motor control with thermal protection
- Smart home automation projects including motorized curtains, gates, and door locks operating at variable voltages
How to Use
Installation of the Pololu 2512 A4990 shield is straightforward: align the shield's header pins with your Arduino board's pin headers and press firmly until fully seated. Connect your two DC motors to the OUT1-OUT2 terminals (Motor A) and OUT3-OUT4 terminals (Motor B), observing correct polarity. Supply motor power to the shield's power input (3V to 30V DC), ensuring your power supply can deliver the required current. In your Arduino sketch, configure pins D2, D3, D4, D6, D11, and D12 as outputs, then use digitalWrite() for directional control and analogWrite() for PWM speed control (0-255 range).
For optimal performance, implement current sensing by reading the analog feedback pins (A0 for Motor A, A1 for Motor B) to detect stalled motors or excessive loads. Always ensure your motor power supply is separate from the Arduino's USB power to prevent voltage drops that could reset the microcontroller. When operating motors above 12V, use appropriate connectors rated for the current draw and consider adding external capacitors (100µF to 470µF) across the motor power terminals to suppress voltage transients. Test your motor control in both directions at varying PWM values before deploying in production robotics applications.
Frequently Asked Questions
Can the A4990 shield handle motors drawing more than 5A continuously?
The A4990 is rated for 5A continuous current per channel, with 10A peak capacity for short durations. Motors exceeding 5A continuous draw will trigger thermal shutdown protection. For higher current applications, consider Pololu's higher-capacity drivers like the DRV8835 dual motor driver or implement parallel motor driver configurations with current distribution.
What is the difference between PWM pins and direction pins?
PWM pins (D3 and D11) control motor speed using pulse-width modulation from 0-255 (0% to 100% duty cycle). Direction pins (D2, D4, D6, D12) determine whether each motor rotates forward or backward. By combining PWM speed with direction control, you achieve full bidirectional speed regulation essential for mobile robotics and precision automation.
Can I use the A4990 with Arduino boards other than Uno?
Yes, the A4990 shield is compatible with Arduino Mega, Arduino Leonardo, and most Arduino-compatible boards with standard header pin spacing. However, verify that your specific board uses the same pin assignments (D2, D3, D4, D6, D11, D12) or modify your code accordingly. Some third-party boards may have different pin configurations requiring firmware adjustments.
How do I implement current sensing for motor load monitoring?
The A4990 provides current sensing outputs on analog pins A0 (Motor A) and A1 (Motor B). Use analogRead() in your Arduino sketch to read these pins, which output a voltage proportional to motor current. Typical output is 525mV per ampere of motor current, allowing you to detect stalled motors, implement current limiting, or trigger safety shutdowns when loads exceed safe thresholds.
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.
Why Buy from The Engineer Store
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy Pololu 2512 A4990 Dual Motor Driver Shield for Arduino Online in India
Purchase the Pololu 2512 A4990 Dual Motor Driver Shield for Arduino online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on Pololu 2512 A4990 Dual Motor Driver Shield for Arduino with fast shipping and expert support.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.