Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz - a blue rectangular microcontroller circuit board featuring a USB port, power jack, reset button, and various pin headers.

Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz

$4.01
$4.01 $5.65
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Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz - a blue rectangular microcontroller circuit board featuring a USB port, power jack, reset button, and various pin headers.
  • Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz - a blue rectangular microcontroller circuit board featuring a USB port, power jack, reset button, and various pin headers.
  • Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz - connected by wires to a red analog joystick module, showing the wiring layout between the board's pins and the joystick.
  • Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz - the blue microcontroller board with its USB jack, power jack, reset button, and labeled pin headers.
  • Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz - a blue rectangular microcontroller circuit board featuring a USB port, power jack, reset button, and various pin headers.
  • Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz - connected by wires to a red analog joystick module, showing the wiring layout between the board's pins and the joystick.
  • Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz - the blue microcontroller board with its USB jack, power jack, reset button, and labeled pin headers.
Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz

Arduino Leonardo R3 Board – ATMEGA32U4 Microcontroller, 20 I/o Pins, USB, 16MHz

$4.01
$4.01 $5.65

📝 Product Description:

The Arduino Leonardo R3 is a powerful microcontroller board based on the ATmega32u4, designed for beginners, hobbyists, and professionals in electronics and embedded systems. With 20 digital I/O pins (7 PWM outputs, 12 analog inputs), a 16 MHz crystal oscillator, micro USB connection, power jack, ICSP header, and reset button, it provides everything needed to start building projects instantly.

Unlike earlier Arduino boards, the Leonardo features native USB communication, eliminating the need for a secondary processor. This allows it to appear to your computer as a keyboard, mouse, and virtual serial COM port, making it ideal for DIY projects, automation, robotics, and human-computer interaction applications.

🔧 Key Features

  • ✅ Microcontroller: ATmega32u4

  • 🔌 Native USB Communication – Acts as keyboard, mouse, or virtual COM port

  • ⚡ 20 Digital I/O Pins – 7 PWM outputs & 12 analog inputs

  • 🖥 Crystal Oscillator: 16 MHz for stable performance

  • 🔋 Operating Voltage: 5V, Input 7–12V (recommended)

  • 🧰 Onboard Interfaces: Micro USB, power jack, ICSP header, reset button

  • 🏭 Compatible With: Arduino IDE & 100% Pro Micro compatible

📋 Technical Specifications:

Attribute Details
Microcontroller ATmega32u4
Operating Voltage 5V
Input Voltage (Recommended) 7–12V
Input Voltage (Limits) 6–20V
Digital I/O Pins 20
PWM Channels 7
Analog Input Channels 12
DC Current per I/O Pin 40 mA
DC Current for 3.3V Pin 50 mA
Flash Memory 32 KB (4 KB used by bootloader)
SRAM 2.5 KB
EEPROM 1 KB
Clock Speed 16 MHz
Dimensions 68.6 × 53.3 mm
Weight 20 g

🌍 Applications

  • Robotics & automation

  • Human-computer interaction (keyboard/mouse emulation)

  • Embedded system development

  • Sensor interfacing & control systems

  • DIY electronics & prototyping

📦 Package Includes

  • 1 × Arduino Leonardo R3 Board

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