Arduino Uno Smd R3

The Uno R3 is the standard starting point of the Arduino ecosystem and the board every tutorial assumes you own. An ATmega328P runs at 16 MHz, programmed over USB-B with the free Arduino IDE. This is the SMD version: the microcontroller is soldered flat to the board rather than sitting in a socket. Same pinout, same shields, same code as the DIP version — but the chip cannot be swapped out if you damage it. Accepts every standard Arduino shield without modification; Powered from USB or a 7-12V DC jack; Largest library and tutorial ecosystem of any board; 5V logic works directly with most hobby modules