Arduino Compatible BoardsCompatible

UNO R3 Board (ATmega328P DIP, CH340G)

Arduino UNO R3 compatible board with a socketed ATmega328P DIP chip, CH340G USB-serial and a USB cable. Programs straight from the Arduino IDE – the classic first board for students and maker

Microcontroller: ATmega328P (DIP-28, socketed)
USB-Serial Chip: CH340G
Clock Speed: 16 MHz
Flash / SRAM / EEPROM: 32 KB / 2 KB / 1 KB
Digital I/O Pins: 14 (6 PWM)
Analog Inputs: 6 (10-bit)

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Specifications

Manufacturer Part Number: ATmega328P
Microcontroller: ATmega328P (DIP-28, socketed)
USB-Serial Chip: CH340G
Clock Speed: 16 MHz
Flash / SRAM / EEPROM: 32 KB / 2 KB / 1 KB
Digital I/O Pins: 14 (6 PWM)
Analog Inputs: 6 (10-bit)
Operating Voltage: 5 V
Input Voltage (DC jack): 7–12 V recommended
USB Connector: USB Type-B
Board Size: 68.6 × 53.4 mm
Compatible With: Arduino IDE, UNO R3 shields

Downloads

Description

The board most Arduino tutorials are written for. It has the same pin layout, size and shield compatibility as the original UNO R3, so every shield, sensor library and example sketch works on it. The ATmega328P sits in a DIP socket – if it ever gets damaged, you can pull it out and replace just the chip.

Features

ATmega328P at 16 MHz, 32 KB flash, 2 KB SRAM, 1 KB EEPROM
14 digital I/O pins (6 PWM) and 6 analog inputs
CH340G USB-to-serial chip – works with the Arduino IDE after a one-time driver install on older Windows versions
Power from USB or a 7–12 V DC barrel jack; on-board 5 V and 3.3 V regulators
Standard UNO R3 header layout – fits all UNO shields

Getting started

Install the Arduino IDE, plug in the board, choose Tools → Board → Arduino Uno and the new COM port, then upload the Blink example. If no COM port appears, install the CH340 driver.