Adafruit Arduino Leonardo ATmega32u4 without headers

The Arduino Leonardo microcontroller board, now discontinued, showcased advanced USB-enabled capabilities via the robust ATmega32u4 chip. With 20 digital I/O pins, 16 MHz oscillator, and versatile connectivity options including micro USB, it offered seamless integration.

Advantages included built-in USB communication, minimizing additional components. It simulated a mouse or keyboard, adding unique interactive features to projects.

Though superseded by alternatives like the Seeeduino Lite, this board was ideal for experienced users due to its unique architecture and potential complexities in shield compatibility.