The Arduino Uno R3 CH340G ATmega328P is a compatible development board built around the ATmega328P SMD microcontroller running at 16MHz with the CH340G USB-to-serial chip handling PC communication. It provides 14 digital I/O pins, 6 PWM outputs, 6 analog inputs, 32KB flash, 2KB SRAM, and 1KB EEPROM at 5V operating voltage. The arduino uno r3 ch340g board accepts power via either the USB-B port or the barrel DC jack, with a recommended 7V to 12V external supply for standalone operation away from a PC.
The SMD ATmega328P chip on this board is soldered directly to the PCB rather than mounted in a DIP socket — this makes the board more compact and vibration-resistant than DIP socket variants, as the chip cannot loosen from its seating during handling or transport. The CH340G driver requires a one-time installation on Windows and macOS before the board appears as a COM port in the Arduino IDE. After installation, upload workflow is identical to any standard Arduino Uno board — select Arduino Uno under the board menu and upload normally. The arduino uno r3 pin configuration is identical to the original Uno R3, meaning all standard Arduino shields, tutorials, and wiring diagrams apply without modification.
The non-obvious advantage of the SMD ATmega328P over DIP is better thermal contact with the PCB, which gives marginally more stable ADC readings at sustained load. The development board is used widely across school and college labs as the standard beginner Arduino platform.
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Features:
- SMD ATmega328P chip soldered permanently for vibration-resistant board operation
- CH340G USB chip supports Arduino IDE on Windows macOS and Linux
- Dual power input accepts USB or DC jack 7V to 12V supply
- 40mA per I/O pin drives LEDs and low-power sensors directly without buffer
- Arduino Uno R3 pinout accepts all standard shield expansion boards directly
Pin Diagram of Arduino UNO R3 CH340G:
Technical Specifications:
 Applications:
- Arduino Uno R3 CH340G ATmega328P used for beginner sensor project build
- College lab uses arduino uno r3 board for standard electronics practical session
- Robotics project uses arduino uno r3 ch340g board as motor control unit
- Home automation build uses development board for relay and sensor switching
- STEM workshop uses arduino uno r3 pin layout for first Arduino build
Package Includes:
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1 x Arduino Uno R3 CH340G ATmega328P
Rupesh Chatterjee –
Full compatibility with Arduino IDE, shields, and IoT sensor modules makes development simple and efficient
Rahul Bisen –
Reliable Arduino Uno board for learning, prototyping, and IoT projects
Adarsh Kulkarni –
Favourite Arduino store
Kunal Trivedi –
Bought from my favourite online store in Rajasthan, multiple payment options were convenient and the board quality exceeded expectations for project work.
Mohan Reddy –
Product as shown
Swati Narang –
Powered via USB for flexible use in DIY projects and prototype development
Aadarsh Saxena –
Best deal available
Neha Choudhary –
Received this arduino board with foam protected packaging and tracked delivery, board worked perfectly and support team was very helpful.