The board everybody gets started with, with an SMD version of the ATmega328. The Arduino Uno Rev3 SMD is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analogue inputs, a 16 MHz ceramic resonator (CSTCE16M0V53-R0), a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started. The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Additional features coming with the R3 version are: * ATmega16U2 instead 8U2 as USB-to-Serial converter. * 1.0 pinout: added SDA and SCL pins for TWI communication placed near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board and the second one is a not connected pin, that is reserved for future purposes. * stronger RESET circuit. "Uno" means "One" in Italian and is named to mark the upcoming release of Arduino 1.0. The Uno and version 1.0 will be the reference versions of Arduino, moving forward. The Uno is the latest in a series of USB Arduino boards and the reference model for the Arduino platform. Getting started The Getting Started section contains all the information you need to configure your board, use the Arduino Software (IDE), and start tinkering with coding and electronics. From the Tutorials section, you can find examples from libraries and built-in sketches as well as other useful information to expand your knowledge of the Arduino hardware and software. Resources * Development Environments * Arduino IDE * Arduino CLI * Arduino Web Editor * Arduino IoT Cloud * Getting Started * Tutorials * Arduino IDE Software * Arduino Uno Rev 3 SMD Pinout * Datasheet Specifications Microcontroller ATmega328P Operating Voltage 5V Input Voltage (recommended) 7-12V Input Voltage (limit) 6-20V Digital I/O Pins 14 (of which 6 provide PWM output) PWM Digital I/O Pins 6 Analog Input Pins 6 DC Current per I/O Pin 20 mA DC Current for 3.3V Pin 50 mA Flash Memory 32 KB (ATmega328P) of which 0.5 KB is used by the bootloader SRAM 2 KB (ATmega328P) EEPROM 1 KB (ATmega328P) Clock Speed 16 MHz LEDBUILTIN 13 Length 68.6 mm Width 53.4 mm Weight 25 g https://elecena.pl/product/22718996/arduino-uno-rev3-smd 2023-03-07 https://elecena.pl/product/22718996/arduino-uno-rev3-smd 2023-12-27 https://elecena.pl/product/22718996/arduino-uno-rev3-smd 2024-09-19 https://elecena.pl/product/22718996/arduino-uno-rev3-smd 2024-11-29 https://elecena.pl/product/22718996/arduino-uno-rev3-smd 2024-11-30 https://elecena.pl/product/22718996/arduino-uno-rev3-smd 2025-06-11 https://elecena.pl/product/22718996/arduino-uno-rev3-smd 2025-11-28 https://elecena.pl/product/22718996/arduino-uno-rev3-smd 2025-11-29