The Arduino Leonardo with headers is a versatile microcontroller board based on the ATmega32u4. Here are its specifications:

Specifications:

• Microcontroller: ATmega32u4
• Operating Voltage: 5V
• Input Voltage (recommended): 7-12V
• Input Voltage (limits): 6-20V
• Digital I/O Pins: 20 (of which 7 can be used as PWM outputs)
• Analog Input Pins: 12
• DC Current per I/O Pin: 40 mA
• DC Current for 3.3V Pin: 50 mA
• Flash Memory: 32 KB (ATmega32u4) of which 4 KB used by bootloader
• SRAM: 2.5 KB (ATmega32u4)
• EEPROM: 1 KB (ATmega32u4)
• Clock Speed: 16 MHz
• LED_BUILTIN: Pin 13
• Features: USB connection, power jack, ICSP header, and a reset button.

Learning Resources:

Arduino Leonardo with headers Documentation

Arduino tutorials

Applications and Projects:

• .Universal Screw-Block Proto-Shield: This project focuses on connecting your Arduino Leonardo to the outside world quickly, easily, and securely, utilizing its digital and analog pins for a variety of sensors and actuators.
• The FatFingerer: A time-saving tool based on the Arduino Leonardo, showcasing how versatile the board can be for creating practical gadgets to assist in everyday tasks.
• HID Devices: The Arduino Leonardo can be used to create your own HID devices, such as custom keyboards, mice, or even game controllers. This is possible because of its ability to emulate these devices when connected to a computer.
• Joystick Creation: Beyond keyboards and mice, the Leonardo can also be turned into a joystick with the help of additional libraries. This application is perfect for custom game controllers or simulators.