The Arduino Uno R3 is the most popular development board for makers, students, and engineers across the world. Built around the Microchip ATmega328P microcontroller, the board provides 14 digital I/O pins (6 of which are PWM-capable), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, and a reset button. Whether you're building your first blinking LED project or prototyping a complex IoT device, the Uno R3 is the gold standard. It works flawlessly with the Arduino IDE, the massive ecosystem of open-source libraries, and thousands of tutorials available online. Every TFx Uno R3 is tested before shipping and comes with a USB-A to USB-B programming cable.