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Integrated Native USB Control: ATmega32U4 microcontroller features built-in USB communication for direct keyboard, mouse, and HID device emulation without external USB-serial chips.
Flexible Embedded Development: Provides 20 digital I/O pins, 12 analog inputs, and 7 PWM channels for robotics, automation systems, sensor integration, and interactive electronics projects.
Reliable Processing Performance: Stable 16MHz clock frequency and integrated USB architecture support efficient embedded control and continuous system operation.
Wide Arduino Compatibility: Compatible with Arduino IDE 1.0.1 and above, enabling simplified programming, debugging, and rapid prototyping workflows.
Easy System Integration: Includes USB cable and supports direct computer communication for embedded development, HID applications, IoT systems, and educational electronics projects.
The Elecbee Leonardo R3 ATmega32U4 Development Board is a USB-enabled embedded controller module designed for robotics, HID device development, IoT systems, automation projects, sensor integration, and embedded electronics applications. Based on the ATmega32U4 microcontroller, the board features integrated USB communication without requiring an external USB-to-serial converter chip.
The Leonardo R3 development board is suitable for USB HID device development, keyboard and mouse emulation, robotics control systems, embedded automation, sensor acquisition, interactive electronic projects, educational development, and IoT prototyping applications.
Powered by the ATmega32U4 microcontroller with integrated USB functionality, the board simplifies system architecture and improves communication efficiency. The stable 16MHz operating frequency supports reliable embedded processing for continuous development and automation tasks.
Compatible with Arduino IDE 1.0.1 and above, the board supports integration with displays, relays, communication modules, motors, sensors, wireless modules, and USB HID applications. The integrated USB controller enables direct communication with computers without requiring additional USB-serial converter hardware.






Shipping | Delivery Period | Elecbee ships orders once a day at about 5pm except Sunday. Once shipped, estimated delivery time depends on the below carriers you chose. Express: 3-7 days. Standard Post: 7-20 days. | |
| Shipping Rates | Shipping rates for your order can be found in the shopping cart. | ||
| Shipping Options | We offer express and standard delivery services. | ||
| Shipping Tracking | We will notify you by email with tracking number once order is shipped. You can track your order using the “Track My Order” feature. | ||
| Returning/Warranty | Returning | Returns are normally accepted when completed within 30 days from date of shipment, please contact customer service for a return authorization. Parts should be unused and in original packaging. Customer has to take charge for the shipping | |
| Warranty | All Elecbee purchases come with a 30-day money-back return policy, plus 1-year Elecbee warranty against any manufacturing defects. | ||
| This warranty shall not apply to any item where defects have been caused by improper customer assembly failure by customer to follow instructions, product modification, negligent or improper operation | |||
| Ordering | How to Buy | Elecbee accepts online orders. | |
| Add to cart > Check out > Submit order > Complete payment > Delivery | |||
| Payment | PayPal, Credit Card includes Visa, Master, American Express, Bank transfer. | ||