Pololu 5065/5064 Motoron M2T256 Dual I²C Motor Controller
Pololu 5065/5064 Motoron M2T256 Dual I²C Motor Controller
Pololu 5065/5064 Motoron M2T256 Dual I²C Motor Controller
The Pololu Motoron M2T256 is a compact dual motor controller that manages two independent DC brushed motors via I²C serial communication, delivering up to 5A continuous current per channel with integrated current sensing and thermal protection. Robotics engineers, autonomous vehicle developers, and embedded systems designers rely on this controller for precise motor speed and direction control in space-constrained applications requiring intelligent power management. This device solves the critical challenge of managing multiple motors with minimal microcontroller pins while providing real-time feedback and fault detection capabilities essential for reliable autonomous systems.
Product Overview
The Motoron M2T256 operates as an intelligent I²C slave device, accepting commands from any microcontroller or single-board computer with I²C capability. The controller features dual full-bridge MOSFET drivers capable of PWM-based speed control from 0-100%, with configurable frequency up to 20kHz for smooth motor operation. Each channel includes integrated current sensing through low-side shunt resistors, allowing real-time monitoring of motor load and detection of stall conditions. The device incorporates thermal management with automatic current limiting when junction temperature exceeds safe thresholds, protecting both the controller and connected motors from damage.
This model stands out through its comprehensive diagnostic capabilities, including per-channel current measurement, temperature monitoring, and fault status reporting accessible via I²C registers. The Motoron M2T256 supports configurable motor behavior parameters such as acceleration limits, deceleration profiles, and safety timeouts through firmware-accessible configuration registers. With a wide operating voltage range of 5.5V to 30V, it accommodates diverse motor types and power supply configurations common in robotics and industrial automation projects. The compact form factor and minimal external component requirements make integration straightforward in bandwidth-limited designs.
Key Specifications
| Specification | Details |
| Product Type | Dual Channel I²C Motor Controller |
| Brand | Pololu Robotics and Electronics |
| Model Number | 5065 (with header pins) / 5064 (without header pins) |
| 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 |
| Operating Voltage | 5.5V to 30V DC |
| Continuous Current per Channel | 5A per motor channel |
| Peak Current Rating | 7A per channel (with thermal limiting) |
| Communication Interface | I²C (400kHz standard, up to 1MHz supported) |
| PWM Frequency | Configurable 1kHz to 20kHz |
| Current Sensing Resolution | Integrated per-channel current measurement |
| Operating Temperature Range | -40°C to +85°C |
| PCB Dimensions | Compact form factor suitable for embedded systems |
Key Features
- Dual Independent Motor Control: Two completely isolated full-bridge channels enabling simultaneous independent speed and direction control of two DC motors with separate current limiting per channel
- I²C Communication Interface: Simple serial protocol requiring only two wires (SDA/SCL) for control, reducing microcontroller pin requirements and enabling multi-device daisy-chaining on shared I²C bus
- Integrated Current Sensing: Real-time per-channel current measurement for motor load monitoring, stall detection, and adaptive control algorithms without external sense resistors
- Thermal Management and Protection: Automatic current limiting when junction temperature exceeds 165°C with configurable shutdown thresholds, preventing thermal runaway and extending device lifespan
- Configurable PWM Control: Adjustable frequency from 1kHz to 20kHz and acceleration/deceleration profiles through I²C registers for smooth motor behavior and acoustic optimization
- Comprehensive Fault Detection: Status registers report overvoltage, undervoltage, overcurrent, thermal shutdown, and communication errors for robust system diagnostics
Applications and Use Cases
- Autonomous Mobile Robots: Dual motor control for differential drive platforms requiring independent left/right wheel speed management with real-time current feedback for terrain detection and obstacle avoidance
- Robotic Arms and Manipulators: Multi-axis motor control for articulated mechanisms where I²C communication simplifies wiring in confined spaces and current sensing enables force-feedback control
- Wheeled Robotics Competitions: FIRST Robotics and similar platforms benefit from compact form factor, high current capacity, and integrated diagnostics for reliable competition performance
- Autonomous Vehicles and Drones: Lightweight motor controller for electric skateboard propulsion, drone gimbal stabilization, and small-scale autonomous ground vehicles with intelligent power management
- Industrial Automation: Conveyor belt speed control, automated gate operators, and multi-motor machinery requiring centralized I²C-based control and real-time current monitoring for predictive maintenance
- Educational Robotics Projects: Arduino and Raspberry Pi compatible controller for student projects, making advanced motor control concepts accessible through simple I²C library implementations
How to Use
Begin by connecting power supply positive to the VIN pin and ground to GND, ensuring voltage is within the 5.5V to 30V operating range. Connect your motor leads to the OUT1A/OUT1B terminals for motor one and OUT2A/OUT2B for motor two, observing polarity for correct directional response. Wire the I²C bus by connecting the SDA and SCL pins to your microcontroller's corresponding I²C pins, adding 4.7kΩ pull-up resistors to VIN if not already present on your development board. Configure the I²C slave address through firmware (default address 0x10) and initialize communication at 400kHz or higher speed supported by your microcontroller.
Control motor speed by writing PWM duty cycle values (0-255 or 0-100 percent) to the appropriate motor control registers via I²C commands. Use the current sensing registers to monitor real-time motor current draw, implementing stall detection by setting threshold values and polling status registers. Configure acceleration and deceleration limits through the device's configuration registers to achieve smooth motor ramping and reduce mechanical stress on drive systems. Monitor temperature and fault status registers continuously, implementing software-based safety shutdown routines if thermal or electrical faults are detected, ensuring your system responds intelligently to adverse conditions.
Frequently Asked Questions
What is the difference between Pololu 5065 and 5064 models?
The 5065 model includes pre-soldered header pins for breadboard prototyping and easy temporary connections, while the 5064 is supplied without header pins for permanent soldering directly to your PCB. Both models contain identical controller electronics and firmware. Choose 5065 for rapid prototyping and 5064 for compact final product designs where soldered connections are preferred.
Can I control more than two motors using a single Motoron M2T256?
The M2T256 controls exactly two motors simultaneously. For systems requiring more motors, you can connect multiple Motoron controllers on the same I²C bus by configuring different slave addresses for each device (addresses are software-configurable). This allows control of 4, 6, 8 or more motors with just two I²C wires, making it scalable for complex multi-motor systems.
What microcontrollers are compatible with the Motoron M2T256?
Any microcontroller or single-board computer with I²C capability is compatible, including Arduino (Uno, Mega, Nano, Due), Raspberry Pi, STM32 boards, PIC microcontrollers, and ESP32. Pololu provides Arduino libraries and extensive documentation with code examples for rapid integration. The I²C interface is industry-standard, ensuring broad compatibility across development platforms.
How do I implement current-based motor stall detection?
Read the current sensing registers for each motor channel via I²C at regular intervals (10-50ms typical). When motor current exceeds a preset threshold while PWM command remains constant, the motor is likely stalled. Implement software logic to reduce motor power, reverse direction, or trigger safety shutdown based on your application requirements. The Motoron's integrated current measurement eliminates need for external sensing circuits.
What happens if the motor supply voltage exceeds 30V?
Exceeding 30V will damage the MOSFET switches and voltage regulation circuitry. The device includes overvoltage detection that reports faults via I²C status registers, but physical damage may occur before firmware protection activates. Always use regulated power supplies within specification and include external fusing or voltage clamping for systems with unstable power sources.
Can I use the Motoron with brushless motors or servos?
The Motoron M2T256 is designed exclusively for brushed DC motors. Brushless motor control requires three-phase commutation electronics not present in this device. For brushless motors, consider Pololu's brushless motor controllers. Standard servo motors require PWM input rather than I²C control and are not compatible with this controller.
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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