Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Microcontroller | ATMEGA32U4 |
| Operating Voltage | 5V |
| Digital I/O Pins | 20 (7 PWM) |
| Analog Input Pins | 12 |
| Flash Memory | 32 KB (4 KB used by bootloader) |
| SRAM | 2.5 KB |
| EEPROM | 1 KB |
| Clock Speed | 16 MHz |
| USB Interface | Native USB (Micro-USB) |
| Compatibility | Arduino IDE & Libraries |
Anonymous
Mar 28, 2026
Rating: 5/5
Reliable and robust
We use these in our makerspace for workshops. They have held up well to constant plugging and unplugging by beginners. The included data cable is a nice touch and saves a trip to the store.
Anonymous
Mar 26, 2026
Rating: 4/5
Good value, minor quirk
Excellent board for the price. Just remember that because it uses native USB, the serial monitor behaves slightly differently than the Uno during reset. Once you get used to it, it's fantastic.
Anonymous
Mar 26, 2026
Rating: 4/5
Great learning tool
Bought this for my university robotics class. It works exactly like the official boards but at a fraction of the cost. The only minor issue is the silk screen printing is slightly faint, but functionality is 100%.
Anonymous
Mar 25, 2026
Rating: 5/5
Son loves it
Purchased this for my teenager who is learning coding. He got it working with his sensor kit right away. The documentation online is plentiful, making it easy for self-teaching.
Anonymous
Mar 19, 2026
Rating: 5/5
Perfect for USB HID projects
The native USB support on the ATMEGA32U4 makes this board incredible for creating custom keyboards and mice. It was recognized immediately by my computer without needing external drivers. Great build quality.
Anonymous
Mar 06, 2026
Rating: 5/5
Seamless Arduino IDE integration
Uploaded my first sketch within minutes. The board appears correctly in the port menu. I appreciate the extra analog pins compared to the Uno model. Highly recommended for intermediate projects.
Q: Can I power this board via the VIN pin?
A: Yes, you can supply unregulated 7-12V power through the VIN pin. The onboard regulator will step it down to 5V for the microcontroller.
Q: How many PWM pins are available on this board?
A: The Leonardo R3 features 7 hardware PWM pins, which are marked with a tilde (~) symbol on the board silkscreen.
Q: Does this board come with headers pre-soldered?
A: No, the headers are not pre-soldered to allow for flexible mounting options. You will need to solder them yourself or use female header sockets.
Q: Is this compatible with the Arduino Motor Shield?
A: Yes, this board follows the standard R3 form factor and pinout, making it fully compatible with most Arduino shields, including the Motor Shield.
Q: Is the included cable suitable for data transfer or just charging?
A: The included Micro-USB cable supports both power and high-speed data transfer, allowing you to upload code and use the Serial Monitor.
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