Arduino Leonardo
The Arduino Leonardo is a microcontroller board based on the ATmega32u4. It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.
The Leonardo differs from all preceding boards in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Leonardo to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port.
Features:
- Microcontroller: ATmega32u4.
- 20 digital I/O pins (7 PWM outputs, 12 analog inputs).
- Built-in USB communication, enabling HID functionality.
- 16 MHz crystal oscillator for precise timing.
- Micro USB connection for programming and power.
- Power options: USB, AC-to-DC adapter, or battery.
- ICSP header for in-circuit serial programming.
- Reset button for easy restarting of the board.
- Features a barrel plug connector, that works great with a standard 9V battery.
Specifications:
| Board | ||
|---|---|---|
| Arduino Leonardo | ||
| Microcontroller | ||
| ATmega32u4 | ||
| USB connector | ||
| Micro USB (USB-B) | ||
| Pins | ||
| Built-in LED Pin | 13 | |
| Digital I/O Pins | 20 | |
| Analog input pins | 12 | |
| PWM pins | 7 | |
| Communication | ||
| UART | Yes | |
| I2C | Yes | |
| SPI | Yes | |
| Power | ||
| I/O Voltage | 5V | |
| Input voltage (nominal) | 7-12V | |
| Input voltage (MAX) | 6-20V | |
| DC Current per I/O Pin | 10 mA | |
| DC Current per I/O Pin (MAX) | 20 mA | |
| DC Current per +3.3V Pin (MAX) | 50 mA | |
| Power Supply Connector | Barrel Plug | |
| Clock speed | ||
| Processor | ATmega32U4 16 MHz | |
| Memory | ||
| Flash Memory | 32 KB of which 4 KB used by bootloader | |
| SRAM | 2.5 KB | |
| EEPROM | 1 KB | |
| Dimensions | ||
| Weight | 20 g | |
| Width | 53.3 mm | |
| Length | 68.6 mm | |
PINOUT:
Applications:
- Human Interface Devices (keyboards, mice, game controllers).
- Interactive installations and art projects.
- Robotics and automation systems.
- Educational tools for learning programming and electronics.
- Prototyping USB-based devices.
Package Contents:
- 1x Arduino Leonardo Board
NOTE: cable not included (normal micro USB cables can be used).
