Arduino Uno R3 Hardware Reference

In the Arduino development board family, the Uno development board is the most beginner-friendly Arduino development board. Because it is easy to learn, stable and reliable, the Uno development board is also the most widely used development board with the most reference materials.

Arduino Uno is a development board based on microcontroller ATmega328P. It has 14 digital input/output pins (6 of these pins can be used as PWM output pins), 6 analog input pins, 16 MHz quartz crystal oscillator, USB interface, power interface, supports in-circuit serial Programming and reset buttons. Users only need to connect the development board to the computer through the USB interface to use it.

If you choose the Arduino clone board, you can learn how to install the driver for the Arduino clone board through our tutorial.

The main technical parameters

Microcontroller: ATmega328P

Working voltage: 5 volts

Input voltage (recommended) : 7-12 volts

Input voltage (limit) : 6-20 volts

Digital input and output pins: 14 (6 of which can be used as PWM pins)

PWM pins: 6

Analog input pins: 6

Input/Output Pin DC Current : 20mA

3.3V pin current: 50 mA

Flash Memory (flash memory): 32 KB (ATmega328P) of which 0.5 KB is used for system boot (bootloader)

SRAM (static memory): 2 KB (ATmega328P)

EEPROM: 1KB (ATmega328P)

Built-in LED pins: 13

Length: 68.6mm

Width: 53.4mm

Weight : 25g

Clock frequency: 16MHz

Pin Description Diagram

TAG： Raspberry Pi Mini TV Core3566102000 JETSON-IO-BASE-A X1300 X1300-A2 Raspberry Pi 5 HDMI to CSI-2 Shield 1080P@60fps & Audio & Video Also Package Kit Raspberry Pi CM4S08032 And Compute Module PoE IO Board Raspberry Pi Raspberry Pi Pico 10.1inch DVI LCD 1.69inch LCD TouchScreen Display 240×280 ST7789 Arduino Raspberry Pi ESP32S3 Pico STM32 Raspberry Pi PICO Long-Range Communication Raspberry Pi 500 (US) refined personal computer.built into a high-quality Keyboard JETSON NANO MINI Expansion Board X1202 Raspberry Pi 5 UPS Board Uninterruptible Power Supply For 18650-Li-Battery (NOT includ) 4-Ports SpotPear ESP32 ST7789 configuration VGA to TTL Raspberry Pi Raspberry Pi 5 PCIe to M.2 NVMe SSD Adapter Board HAT Pi5-PCIe-MPS2242-2230-Board Raspberry Pi Raspberry Pi Camera Raspberry Pi CM5 Mini Base IO Board NANO B Development For Compute Module 5

Arduino Uno R3 Hardware Reference

UNO R3 Development board Case ABS UNO R3 case for Arduino