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The Pro Mini (5V) is a minimalistic microcontroller based on the ATmega328P. Runs at 5V and 16MHz, ideal for low-power and compact projects. Has 14 digital I/O pins, 6 analog inputs, and no onboard USB. Requires an external USB-to-serial adapter for programming. Small form factor makes it perfect for embedded applications. Compatible with Arduino IDE and standard libraries. Great for wearables, sensors, and battery-powered devices.