SPECIFICATIONS

The True Geek‘s Starting Point! UNO R3 Board (ATmega328P + CH340G), 100% Arduino IDE Compatible. Open-Source Ecosystem. Headers Provided for Custom Soldering. Start Your Electronics Journey.

Key Features & Benefits:

🚀 Open-Source & Rich Ecosystem: Fully compatible with the official Arduino IDE. Dive into the world‘s largest open-source hardware community with countless projects, tutorials, and libraries.

💰 Excellent Cost Performance: Utilizes the proven CH340G USB to Serial chip, delivering full stability and functionality at a highly competitive price.

🛠️ Flexible DIY Freedom: We provide unsoldered pin headers and one full-length header strip. You decide which pins to solder and whether to cut it, enabling true customization and zero waste.

🛡️ Stable Driver, Wide OS Support: The CH340G driver is mature and easy to install on Windows 7/8/10/11 (32/64-bit), Mac OS, and Linux, eliminating compatibility headaches.

🔌 Powerful Expansion: Based on the ATmega328P MCU, it offers 14 digital I/O (6 PWM), 6 analog inputs, UART, I2C, and SPI interfaces for easy connection to sensors, displays, motors, and communication modules.

Product Description:

This UNO R3 board is the perfect tool to explore embedded systems and IoT. Whether you‘re a student, educator, maker, or engineer, it turns your ideas into prototypes fast. From blinking LEDs to smart home controllers, robots to data loggers, the UNO R3 is the brain behind countless amazing projects, thanks to its ease of use and limitless expandability. Our flexible SKU options cater to everyone from beginners to advanced users.

🚨 Critical User Guide: Read Before First Use!

❌ 【Product Clarification】:

This is a third-party Arduino-compatible board. It is fully hardware and software compatible with the official Arduino standard.

⚠️ 【The Most Important Step: Driver Installation】:

You MUST install the driver on first connect! Do NOT use Windows Update. Manually install the CH340G driver from our provided link or cloud storage.

Failed driver installation is the #1 issue for beginners! If the COM port isn‘t recognized, check this step first.

✅ 【Required Setup Workflow】:

1. Install Driver: Successfully install the CH340G driver.

2. Install Arduino IDE: Download and install the latest IDE from the official Arduino website.

3. Select Board & Port: In the IDE‘s Tools menu, select Board as Arduino Uno and choose the detected COM port (e.g., COM3).

4. Upload an Example: Open the Blink example, click "Upload", and see if the onboard L LED starts blinking.

🔧 【Hardware Usage & Soldering Safety Warnings】:

Soldering Responsibility: Pin headers require user soldering. Ensure good ventilation, use proper soldering iron temperature (~350°C), and avoid prolonged heat to prevent pad damage. Soldering involves risk; ensure you have the skill or supervision.

Power Warning: Can be powered via USB (5V) or external DC jack (Recommended 7-12V DC, center positive). NEVER apply voltage above 12V!

Pin Current Limits: Max 40mA per I/O pin, 50mA for the 3.3V pin. Directly driving motors, relays, etc., will damage the board. Always use an external power supply and driver module (e.g., L298N).

📦 【SKU Selection & Package Confirmation】:

Please double-check your selected SKU before ordering!

SKU A (Board Only): Includes Main Board + 1x Long Header Strip. USB Cable is NOT included. Ideal for users who already have a cable or are buying in bulk.

SKU B (Board with Cable): Includes Main Board + 1x Long Header Strip + 1x USB Cable (Type-A to Type-B). Ideal for users needing the basic ready-to-use package.

Headers are UNSOLDERED in both SKUs for maximum DIY flexibility.

Specifications:

Microcontroller: ATmega328P

USB to Serial Chip: CH340G

Operating Voltage: 5V

Input Voltage (Recommended): 7-12V DC (via DC jack)

Digital I/O Pins: 14 (of which 6 provide PWM output)

Analog Input Pins: 6

DC Current per I/O Pin: 40 mA

DC Current for 3.3V Pin: 50 mA

Flash Memory: 32 KB (0.5 KB used for bootloader)

SRAM: 2 KB

EEPROM: 1 KB

Clock Speed: 16 MHz

Onboard LED: Pin 13

Dimensions: Approx. 68.6mm × 53.4mm