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Compatible Arduino UNO R3 SMD - CH340

Name: Compatible Arduino UNO R3 SMD - CH340
Brand: Kuongshun
SKU: ARD005
Price: 9.95 EUR
Availability: InStock

Arduino Compatible Boards

Reference: ARD005

Part.No: AA003

€9.95

In Stock

Immediate Dispatch

The Compatible UNO R3 SMD CH340 delivers the same functionality as the Arduino UNO R3 — ATmega328 SMD @ 16MHz, 14 digital I/O, 6 analog inputs, USB-to-serial via CH340 — at a lower price. Ideal for education, prototyping, and budget-conscious projects.

⚙️ ATmega328 SMD @ 16MHz — identical specs to UNO R3
🔌 14 digital I/O (6 PWM), 6 analog inputs, 5V operation
💡 CH340 USB-to-serial chip — driver installation required
⚠️ Not a genuine Arduino board. For the genuine Arduino UNO Rev3 SMD click here.

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Description
Product Details

Compatible UNO R3 SMD CH340 — UNO R3 Functionality at a Budget-Friendly Price

⚠️ Important Note: This board is compatible with the Arduino UNO R3 but is not a genuine Arduino board. If you want the official, genuine board with full Arduino support, choose the Arduino UNO Rev3 SMD (A000073).

The Compatible UNO R3 SMD CH340 (SKU: AA003) is functionally identical to the Arduino UNO R3: same ATmega328 microcontroller @ 16MHz, same pinout, same full compatibility with Arduino IDE sketches, libraries, and shields. The difference lies in the USB-to-serial chip — instead of the ATmega16U2 found on the genuine UNO, this board uses the CH340, which requires a driver to be installed on your computer. Beyond that, the user experience is practically identical — ideal for education, prototyping, and projects where budget matters.

Technical Specifications

Feature	Specification
Microcontroller	ATmega328 SMD (AVR architecture)
USB-to-Serial Chip	CH340 (driver installation required)
Operating Voltage	5V
Clock Speed	16 MHz
Flash / SRAM / EEPROM	32 kB (0.5kB bootloader) / 2 kB / 1 kB
Digital I/O Pins	14 (6 PWM)
Analog Input Channels	6
DC Current per I/O / 3.3V Pin	20 mA / 50 mA
Pinout	UNO R3 — full shield compatibility
Dimensions / Weight	68.6mm × 53.4mm / 25g

Compatible vs Genuine Arduino — What's the difference?

	Compatible UNO R3 SMD CH340	Genuine Arduino UNO Rev3 SMD
MCU	ATmega328 SMD	ATmega328P SMD
USB chip	CH340 (driver required)	ATmega16U2 (plug & play)
Arduino IDE	✓ Full compatibility	✓ Full compatibility
Shields / Libraries	✓ Full compatibility	✓ Full compatibility
Official Arduino support	✗	✓
Price	Lower	Higher
Best for	Education, prototyping, budget projects	Professional use, official open-source support

Who is it for?

Schools & educational institutions: For labs that need multiple boards simultaneously, the compatible version offers the same functionality at a lower cost per student. The code, shields, and tutorials are exactly the same as the genuine UNO.
Students & beginners: If you want to explore Arduino without a large investment, the compatible board is an excellent choice. It works with the Arduino IDE and runs all the tutorials you'll find online.
Makers & prototypers: For multi-board projects or applications where the board is permanently embedded in a final product, the compatible version offers significant cost savings without sacrificing functionality. Pair with shields and sensors.

Frequently Asked Questions

Does the CH340 chip require a driver to be installed?
Yes. Unlike the genuine Arduino UNO which is recognised automatically, the CH340 chip requires a driver to be installed. The driver is free and available for Windows, macOS, and Linux. Once installed, the board works normally from the Arduino IDE.

Does it run the same code as the genuine Arduino UNO?
Yes, absolutely. The ATmega328 is the same microcontroller — all Arduino sketches, libraries, and tutorials work exactly the same. The CH340 vs ATmega16U2 difference concerns only the USB communication chip, not the board's logic.

When should I choose the genuine Arduino UNO instead of this compatible version?
Choose the genuine Arduino UNO Rev3 SMD if you want plug-and-play USB without a driver, need official Arduino support, or use the DFU method for firmware updates. For education and prototyping, the compatible board is an excellent choice.