Pololu 3290 / 3291 RoboClaw Solo Motor Controller
Pololu 3290 / 3291 RoboClaw Solo Motor Controller
Pololu 3290 / 3291 RoboClaw Solo Motor Controller
The Pololu RoboClaw Solo is a compact, single-channel DC motor controller designed for precise speed and direction control of brushed DC motors up to 30A continuous current. Roboticists, autonomous vehicle developers, and industrial automation engineers rely on this controller for its robust commutation logic, thermal management, and versatile communication interfaces including USB, serial, and analog control. This controller solves the critical challenge of delivering reliable, programmable motor control in space-constrained applications where full dual-channel controllers are unnecessary.
Product Overview
The RoboClaw Solo operates on a sophisticated PWM-based control architecture that delivers smooth, efficient power delivery to DC motors while maintaining precise speed regulation through feedback mechanisms. The controller features integrated protection circuitry including over-current shutdown, thermal cutoff at 85°C, and reverse polarity protection, ensuring your motor and power supply remain safe during fault conditions. The device supports supply voltages from 5V to 30V, making it compatible with standard battery packs, bench supplies, and automotive electrical systems. Its compact form factor measures just 2.4 x 1.2 inches, allowing integration into tight mechanical enclosures without sacrificing functionality.
What distinguishes the RoboClaw Solo from generic PWM controllers is its multi-protocol communication capability. Users can control motor speed and direction via analog voltage input (0-5V), serial UART commands at 2400-115200 baud, or USB connection with dedicated software. The device maintains real-time telemetry including motor current draw, temperature, and supply voltage, enabling sophisticated closed-loop control systems. The firmware is field-upgradeable via USB, ensuring you benefit from future enhancements and bug fixes without hardware replacement.
Key Specifications
| Specification | Details |
| Product Type | Single Channel DC Motor Controller |
| 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 |
| Continuous Current Rating | 30A at 12V nominal |
| Peak Current Rating | 40A for 10 seconds |
| Supply Voltage Range | 5V to 30V DC |
| Control Interfaces | USB, Serial UART, Analog 0-5V |
| Thermal Protection | Automatic shutdown at 85°C |
| Dimensions | 2.4 x 1.2 x 0.6 inches (61 x 30 x 15mm) |
Key Features
- 30A continuous motor current capacity with 40A peak rating for 10 seconds, enabling control of mid-range brushed DC motors from 12V to 24V systems
- Integrated thermal management with automatic shutdown at 85°C junction temperature, protecting against catastrophic failure in demanding applications
- Multi-protocol communication supporting USB for programming, serial UART for embedded systems integration, and analog voltage input for simple potentiometer-based control
- Real-time telemetry feedback including motor current draw, supply voltage monitoring, and temperature sensing for closed-loop control and diagnostics
- Reverse polarity protection and over-current shutdown circuitry preventing damage from accidental wiring errors or short circuits
- Field-upgradeable firmware via USB connection, ensuring compatibility with future software enhancements without hardware replacement
Applications and Use Cases
- Autonomous mobile robots and wheeled platforms requiring independent motor control for differential drive locomotion with precise speed regulation
- Robotic arm actuators and gripper mechanisms where smooth acceleration profiles and current limiting prevent mechanical shock and motor stalling
- Conveyor belt systems and material handling equipment needing programmable speed control with remote operation via serial commands
- Electric vehicle propulsion systems and go-kart controllers where robust thermal management and high current capability are essential for sustained operation
- Laboratory test equipment and automated machinery requiring USB-controlled motor actuation with real-time current and temperature monitoring
How to Use
Begin by connecting your power supply (5V-30V) to the battery input terminals, ensuring correct polarity as indicated by the silkscreen markings. Connect your DC motor to the motor output terminals. For analog control, apply a 0-5V signal to the analog input pin from a potentiometer or microcontroller DAC. For serial control, connect a UART interface at 2400-115200 baud and send ASCII commands to set motor speed (-127 to 127 for full reverse to full forward). For USB programming and configuration, connect the micro-USB port to your computer and use the official RoboClaw configuration software to set parameters, calibrate analog inputs, and monitor real-time telemetry.
Advanced users can implement closed-loop speed control by reading the motor current feedback and adjusting PWM commands accordingly. The device supports configurable acceleration ramps, preventing sudden current spikes that damage gearboxes or mechanical linkages. Always monitor the thermal indicator during initial testing at maximum current to ensure adequate heatsinking. For applications exceeding 30A continuous current, consider using multiple RoboClaw Solo units in parallel with current-sharing resistors, or upgrade to the dual-channel RoboClaw 2x60A model.
Frequently Asked Questions
What is the difference between the Pololu 3290 and 3291 models?
The Pololu 3290 is the standard RoboClaw Solo with full feature set. The 3291 variant is functionally identical with identical specifications and firmware. Both models support the same communication protocols, current ratings, and voltage ranges. Selection between the two depends on availability and your specific procurement requirements, as they are interchangeable for most applications.
Can I control multiple motors independently with a single RoboClaw Solo?
No, the RoboClaw Solo controls one DC motor channel only. For two independent motors, you require either two RoboClaw Solo units or a single RoboClaw 2x60A dual-channel controller. However, you can connect multiple Solo units to the same serial bus and address them individually via unique device IDs set through the configuration software.
What happens if I exceed the 30A continuous current rating?
The controller includes over-current protection that triggers automatic shutdown when current exceeds safe limits, protecting the internal MOSFETs and circuitry. The device will resume operation after cooling. For applications requiring sustained currents above 30A, upgrade to the RoboClaw 2x60A model or implement external current limiting using series resistors or dedicated current-limiting power supplies.
Does the RoboClaw Solo work with brushless DC motors?
No, the RoboClaw Solo is designed exclusively for brushed DC motors. Brushless DC motors require a dedicated ESC (Electronic Speed Controller) with commutation logic. Using this controller with brushless motors will result in erratic behavior and potential damage. For brushless motor control, select appropriate ESC models rated for your motor specifications.
Can I use this controller with a 48V power supply?
No, the maximum rated supply voltage is 30V DC. Applying 48V will immediately damage the internal voltage regulators and MOSFETs. For high-voltage applications above 30V, you must use dedicated controllers rated for that voltage range or implement a DC-DC converter to step down the voltage to safe levels.
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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- Returns: 7-day return policy on manufacturing defects only
Buy Pololu 3290 / 3291 RoboClaw Solo Motor Controller Online in India
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