Pololu 3116 / 3117 A-Star 32U4 Robot Controller LV with Raspberry Pi Bridge
Pololu 3116 / 3117 A-Star 32U4 Robot Controller LV with Raspberry Pi Bridge
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The Pololu A-Star 32U4 Robot Controller LV is a programmable microcontroller board featuring an ATmega32U4 processor, specifically designed for robotics applications requiring integrated motor control and Raspberry Pi integration. Professional roboticists, embedded systems engineers, and autonomous vehicle developers rely on this controller for its dual-motor driver capability, low-voltage operation, and seamless Raspberry Pi connectivity through the onboard bridge. This product solves the critical challenge of coordinating high-level Raspberry Pi processing with real-time motor control, eliminating the need for external motor drivers and communication modules in compact robot designs.
Specifications
| Specification | Details |
| Product Type | Microcontroller Robot Controller with Motor Driver |
| Brand | Pololu Robotics and Electronics |
| Origin | Original/Authentic |
| Microcontroller | ATmega32U4 running at 16 MHz |
| Motor Drivers | Dual integrated drivers, 1.5A per channel continuous |
| Operating Voltage | 2.7V to 11.8V input range |
| Communication Interfaces | USB, I2C, SPI, UART, PWM outputs |
| Analog Inputs | 6 multiplexed ADC channels at 10-bit resolution |
| Digital I/O Pins | 20 programmable GPIO pins |
| Board Dimensions | 2.6 inches x 2.2 inches |
- Product Type: Microcontroller Robot Controller with Motor Driver
- Brand: Pololu Robotics and Electronics
- Origin: Original/Authentic
- Support: reliable via Email and WhatsApp
- Microcontroller: ATmega32U4 running at 16 MHz
- Motor Drivers: Dual integrated drivers, 1.5A per channel continuous
- Operating Voltage: 2.7V to 11.8V input range
Why Choose Pololu 3116 / 3117 A-Star 32U4 Robot Controller LV with Raspberry Pi Bridge?
100% Authentic
GST Invoice - A GST invoice is included with every order.
Expert Support - Dedicated technical help on WhatsApp and email.
Pan-India Delivery - Shipped across Bengaluru, Delhi NCR, Hyderabad and all of India.
Trusted by Makers - Used by students, hobbyists and professionals nationwide.
Key Features of Pololu 3116 / 3117 A-Star 32U4 Robot Controller LV with Raspberry Pi Bridge
- Integrated Dual Motor Drivers with 1.5A continuous current per channel enabling direct control of two DC motors with PWM speed regulation and direction reversal without external motor modules
- ATmega32U4 Microcontroller with native USB support providing USB bootloader programming capability and direct computer communication without additional serial converters
- Raspberry Pi Bridge Interface using I2C protocol allowing seamless two-way communication between Raspberry Pi and A-Star for distributed robotics architectures and sensor fusion applications
- Low-Voltage Operation from 2.7V to 11.8V supporting diverse battery types including 3xAA, 2S LiPo, and 9V batteries with automatic voltage regulation for stable logic levels
- Built-in Current Sensing on motor drivers enabling stall detection, load monitoring, and dynamic motor control algorithms for autonomous navigation
- 6 Analog Input Channels with 10-bit ADC resolution for integration of analog sensors including distance sensors, light sensors, and potentiometers
- Thermal Protection Circuitry preventing motor driver damage during overcurrent or excessive temperature conditions with automatic shutdown and reset capability
- Payment Options: UPI, credit/debit cards, net banking, EMI available
Perfect For
- Autonomous Mobile Robots using Raspberry Pi for computer vision and path planning while A-Star handles real-time motor control, odometry, and obstacle avoidance algorithms
- Line-Following and Maze-Solving Robots leveraging analog sensor inputs for track detection and PWM motor control for precise steering and speed adjustment
- Educational Robotics Platforms in universities and maker spaces where students learn embedded systems, motor control, and distributed computing through hands-on implementation
- Robot Competitions including RoboWars, line-following challenges, and autonomous navigation contests where compact size and integrated motor control provide competitive advantages
- Sensor Data Acquisition Systems using the A-Star as a dedicated real-time controller collecting analog sensor data while Raspberry Pi processes and logs information to cloud services
- Multi-Robot Swarm Applications where multiple A-Star boards coordinate through Raspberry Pi master nodes for distributed control and inter-robot communication
How to Use
Begin by installing the Arduino IDE on your computer and downloading the Pololu A-Star board support package to enable programming the ATmega32U4 directly via USB. Connect the A-Star to your computer using a micro-USB cable, select the appropriate board and COM port in Arduino IDE, and upload example sketches to verify basic functionality including LED blinking and serial communication. Wire your DC motors to the motor driver outputs, ensuring proper polarity for forward and reverse control, and configure PWM pins for speed regulation using analogWrite() function with values 0-255 for motor speed control.
For Raspberry Pi integration, install the I2C libraries on your Raspberry Pi and connect the SDA and SCL pins from the A-Star to the Raspberry Pi's I2C bus (GPIO 2 and GPIO 3). Program the A-Star as an I2C slave device to receive motor commands from the Raspberry Pi master, and implement sensor reading routines on the A-Star to transmit real-time feedback including encoder counts, current draw, and analog sensor values back to the Raspberry Pi. Test communication using I2C scanning tools to confirm device detection at the configured address, then deploy your robotics application with the Raspberry Pi handling high-level decision logic while the A-Star executes motor control commands with millisecond-level precision.
Product Overview
The A-Star 32U4 Robot Controller LV integrates a powerful ATmega32U4 microcontroller with dual motor drivers on a single compact board, enabling simultaneous control of two DC motors or one stepper motor with current limiting and direction control. The onboard Raspberry Pi bridge allows direct communication between the Raspberry Pi and the A-Star via I2C protocol, creating a distributed processing architecture where the Raspberry Pi handles vision processing and high-level decision making while the A-Star manages real-time motor control and sensor feedback at 16 MHz clock speed. The low-voltage design operates from 2.7V to 11.8V, making it ideal for battery-powered mobile robots with flexible power source compatibility.
This controller features a built-in USB interface for programming and debugging, eliminating the need for external programmers, and includes analog-to-digital converters for sensor integration. The motor drivers deliver up to 1.5A per channel with PWM speed control, thermal shutdown protection, and current sensing capabilities that allow real-time monitoring of motor load and stall detection. The board measures just 2.6 inches by 2.2 inches, fitting within the space constraints of compact robotic platforms while providing all necessary control infrastructure for autonomous navigation, obstacle avoidance, and multi-sensor fusion applications.
Frequently Asked Questions
Can the A-Star 32U4 control stepper motors instead of DC motors?
Yes, the integrated motor drivers support stepper motor control by sequencing the motor outputs in proper step patterns. One stepper motor can be controlled using both motor driver channels in coordinated fashion, or two smaller stepper motors can be controlled simultaneously. However, stepper motors require higher current than typical DC motors, so verify your stepper motor current rating does not exceed the 1.5A continuous per-channel specification to prevent thermal shutdown.
What is the maximum PWM frequency for motor speed control?
The A-Star 32U4 supports PWM frequencies up to 20 kHz on the motor control pins, though the default Arduino frequency is 490 Hz. Higher PWM frequencies reduce motor audible noise and improve control smoothness but consume more microcontroller resources. You can adjust PWM frequency using timer configuration registers if your application requires ultrasonic operation for noise-sensitive environments.
How do I interface analog sensors like ultrasonic distance sensors with the A-Star?
The A-Star provides 6 analog input channels (ADC0-ADC5) that accept 0-5V signals and convert them to 10-bit digital values (0-1023). Connect analog sensor outputs directly to these pins and read values using analogRead() function in Arduino IDE. For sensors requiring external power, use the 5V regulated output on the board, but ensure total current draw from all sensors does not exceed the board's power budget, typically 100-200mA depending on input voltage.
Is the Raspberry Pi bridge compatible with all Raspberry Pi models?
The I2C bridge is compatible with all Raspberry Pi models including Pi Zero, Pi 3, Pi 4, and Pi 5, as they all feature standard I2C pins on the GPIO header. Ensure you configure I2C on your Raspberry Pi using raspi-config tool and install appropriate I2C libraries like python-smbus or smbus2 for Python programming. The 3.3V logic levels from Raspberry Pi are compatible with the A-Star's 5V tolerant inputs, but ensure proper pull-up resistor configuration for reliable I2C communication.
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.
Customer Support
Email: techdepotindia@gmail.com
WhatsApp: Available for setup and troubleshooting help
Order your Pololu 3116 / 3117 A-Star 32U4 Robot Controller LV with Raspberry Pi Bridge today and start building your next project.