{"title":"Arduino Uno - R3","handle":"arduino-uno-r3","url":"/products/arduino-uno-r3","description":"The Arduino Uno R3 is the most popular Arduino board and an ideal starting point for learning electronics and programming. Built around the ATmega328 microcontroller, it offers a robust platform for prototyping, interactive projects, and connecting to sensors, actuators, and other hardware.\n\nThe R3 revision features an ATmega16U2 USB controller (replacing the earlier 8U2/FTDI), enabling faster transfer rates, more memory, and native USB device emulation — allowing the board to appear as a keyboard, mouse, joystick, or other HID device. Additional SDA/SCL pins and an IOREF pin improve shield compatibility.\n\nKey Features\n\n\nATmega328 Microcontroller – 32KB flash memory, 2KB SRAM, 1KB EEPROM\n\n14 Digital I/O Pins – 6 of which provide PWM output\n\n6 Analogue Inputs – For reading sensors and variable signals\n\n16 MHz Clock Speed – Reliable performance for most projects\n\nATmega16U2 USB Controller – Faster uploads and native USB HID support\n\nInput Voltage – 7–12V recommended (6–20V limits)\n\nSDA/SCL Pins – Dedicated I2C header pins alongside AREF\n\nIOREF Pin – Allows shields to automatically adapt to board voltage\n\nNo Drivers Required – Plug-and-play on Linux and macOS; Windows drivers included with the Arduino IDE\n\n\nIdeal For\n\nBeginners learning electronics and programming\nPrototyping interactive projects and IoT devices\nRobotics, home automation, and sensor-based applications\nEducational use in schools and universities\n\n\nPackage Contents\n\n1× Arduino Uno R3\n\n\nResources\n\nArduino Uno R3 Documentation\nArduino IDE Download\nSchematic (PDF)\nEagle Files\n","vendor":"SparkFun","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":12126,"title":"Default Title","sku":"SF-DEV-11021","price":72.26,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":382,"option1":"Default Title"}]}