The Arduino UNO is one of the best boards to get started with electronics and coding. If this is your first experience tinkering with the platform, the UNO is the most robust board you can start playing with. The UNO is the most used and documented board of the whole Arduino family. The Arduino Uno is a microcontroller board based on the ATmega328P (datasheet). 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. You can tinker with your Uno without worrying too much about doing something wrong, and in the worst case scenario you can replace the chip for a few dollars and start over again. "Uno" means one in Italian and was chosen to mark the release of Arduino Software (IDE) 1.0. The Uno board and version 1.0 of Arduino Software (IDE) were the reference versions of Arduino, now evolved to newer releases. The Uno board is the first in a series of USB Arduino boards, and the reference model for the Arduino platform; for an extensive list of current, past or outdated boards see the Arduino index of boards. Getting started The Getting Started with Arduino Uno page 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. Find inspiration for your Uno projects from our tutorial platform Project Hub. Resources * Development Environments * Arduino IDE * Arduino CLI * Arduino Web Editor * Arduino IoT Cloud * Getting Started * Tutorials * Schematics * Arduino Uno Pinout 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 used by 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/22718998/arduino-uno-rev3 2023-03-07 https://elecena.pl/product/22718998/arduino-uno-rev3 2023-07-28 https://elecena.pl/product/22718998/arduino-uno-rev3 2023-12-27 https://elecena.pl/product/22718998/arduino-uno-rev3 2024-09-19 https://elecena.pl/product/22718998/arduino-uno-rev3 2024-11-29 https://elecena.pl/product/22718998/arduino-uno-rev3 2024-11-30 https://elecena.pl/product/22718998/arduino-uno-rev3 2025-11-28 https://elecena.pl/product/22718998/arduino-uno-rev3 2025-11-29