• sales

    +86-0755-88291180

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: CAN FD Industrial Isolated RS485 TO ETH (C) RJ45 Converter Wall/Rail-Mount For Modbus ESP32 S3 5 inch LCD Development Board 800x480 TouchScreen Display TVBOX LVGL HMI Sensor CAN RS485 Lidar Raspberry Pi Pico 2 RP2350 Pico2 ARM Cortex-M33 And RISC-V Hazard3 520KByte 4MByte QSPI Flash Raspberry Pi 5 Audio Card STM32 0.85inch LCD Orange Pi Zero 3 Milk-V Raspberry Pi User Guide Raspberry Pi LCD User Guide Arduino MEGA2560 R3 DeepSeek XiaoZhi AI Voice Chat Robot BOX ESP32-S3 Development Board 3.5 inch LCD N16R8 Touchscreen Display 6-Axis /Camera /SD ESP32 Thermal imaging camera JETSON NANO MINI Raspberry Pi 2-Channel Isolated CAN Bus Expansion HAT Dual Chips Solution Built-In Multi Protections PCIe M.2 NVMe Dual SSD ESP32-S3 Development Board 4 inch LCD TouchScreen Display 480x480 RS485 /SHT20 /Relay For Arduino LVGL 86 TVbox CH340 driver