Leonardo R3 Microcontroller Development Board with USB Cable Kit for Arduino Pro

• [Beginner-Friendly Setup – No Frustration] - New to Arduino? Here's a pro tip: Open Arduino IDE, go to Tools > Board, and select "Arduino Leonardo" – that's it! Choose correctly and upload your code smoothly without compilation errors. Includes a USB cable for true plug-and-play convenience.
• [Official Wiki & Full Technical ] - Backed by a dedicated official Wiki – your complete resource for detailed specs, pinout diagrams, driver setup, and sample codes. Whether you're a beginner or a pro, get the documentation you need to bring your projects to life faster and with confidence.
• [Native HID – Keyboard/Mouse Emulation] - Powered by the ATmega32U4 microcontroller with built-in USB communication – no extra chip needed! Emulate a keyboard or mouse directly for custom game controllers, automation tools, programmable shortcut panels, and more. Unleash your creativity with true plug-and-play HID functionality.
• [FCC/CE Certified] - Engineered with eco-friendly materials and rigorously tested – every single board undergoes full functional, voltage, and current inspections before packaging. FCC and CE certified to ensure safety, reliability, and peace of mind for your critical projects.
• [Rich I/O for Endless Possibilities] - Features 20 digital I/O pins (7 PWM), 12 analog inputs, a 16 MHz crystal oscillator, and supports UART, I2C, and SPI. Easily connect sensors, motors, displays, and countless modules – the perfect brain for robotics, interactive art, DIY electronics, and rapid prototyping.

Specification
Controller: ATmega32u4
Working frequency: 16 MHz
Working voltage: 5V
Input voltage (recommended): 7-12v
Digital I/O port: 23
PWM channel: 7
Analog input: 12
Maximum allowable current of 5V digital/analog port: 40 mA
Maximum allowable current of 3.3V digital/analog port: 50 mA
Flash Memory: 32 KB (ATmega32u4) of which 4 KB used by boot loader
SRAM: 2.5 KB (ATmega32u4)
EEPROM: 1 KB (ATmega32u4)

Other related instructions
Digital IO port: 23 (D0 - D13, D14-MISO, D15-SCK, D16-MOSI, D18-23 [A0-A5])
Analog input: 12 (A0 - A5, D4 - A6, D6 - A7, D8 - A8, D9 - A9, D10 - A10, D12-A11)
Serial communication: D0 (RX) and D1 (TX)
IIC communication: D2 (SDA) and D3 (SCL)
External interrupt: D3 (interrupt 0), D2 (interrupt 1), D0 (interrupt 2), D1 (interrupt 3) and D7 (interrupt 4)
PWM port: D3, D5, D6, D9, D10, D11 and D13
SPI: ICSP pins.SPI communication by using the SPI library. It is important to note that SPI pins do not connect to any number I/O pins like UNO, they can only work on the ICSP port.This
means that if your expansion board has no ICSP pin connected to the 6 feet, it will not work.
LED: 13. There is a built-in LED on the digital pin 13. When the pins are high level, LED is bright;when the pins are low level,the LED is not bright.

List:
1 x Leonardo R3 Development Board
1 x Usb Cable

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