Adafruit Metro 328 without Headers

The Adafruit Metro 328 without headers is a versatile electronics module based on the popular ATmega328 microcontroller. This module is ideal for developers and hobbyists looking for a user-friendly platform for their projects. With a variety of GPIO pins, analog inputs, and integrated communication interfaces such as UART, SPI, and I2C, the Metro 328 offers ample functionality for simple to medium applications. It is equipped with a 16 MHz clock and features 32 KB of flash memory as well as 2 KB of RAM, making it a powerful choice for prototype development. Power can be supplied via a 2.1mm DC jack or a micro USB port, with the module automatically switching between the two sources. The ability to change the logic levels from 5V to 3.3V significantly expands the module's application possibilities. With its four status LEDs, the Metro 328 is also easy to monitor and control.

• ATmega328 microcontroller with 32KB flash and 2KB RAM
• 20 GPIO pins, including 6 analog inputs
• Integrated hardware interfaces: SPI, I2C, and UART
• Automatic switching between USB and DC power supply
• Adjustable logic levels from 5V to 3.3V.