Uno R3 CH340G ATmega328p Development Board with USB Cable – Arduino Compatible
Uno R3 CH340G ATmega328p Development Board with USB Type-B Cable – Compatible
The Uno R3 CH340G is a microcontroller board built around the ATmega328p, designed as a drop-in replacement for the Arduino Uno. It uses a CH340G USB-to-serial converter instead of the original ATmega16U2, making it a cost-effective choice while retaining full compatibility with the Arduino ecosystem. The included USB Type-B cable gets you started the moment you unpack.
Key Specifications
| Specification | Value |
|---|---|
| Microcontroller | ATmega328P |
| USB-to-Serial Chip | CH340G |
| Operating Voltage | 5V |
| Digital I/O Pins | 14 (6 provide PWM output) |
| Analog Input Pins | 6 |
| Clock Speed | 16 MHz |
What You Can Build With This
- Home automation sensor node that reads temperature/humidity and controls relays over Wi-Fi or Bluetooth with add-on modules.
- Line-following robot using infrared sensors and DC motor drivers – perfect for student competitions.
- Data logger that timestamps sensor readings to an SD card module for environmental monitoring.
- Interactive LED sculpture with PWM-controlled RGB strips, responding to sound or touch sensors.
Compatibility
This board works seamlessly with the Arduino IDE (1.0 onward) once you install the CH340G driver. All 3.3V and 5V shields fit directly, as do standard sensors, LCDs, and servo motors. It pairs naturally with common modules like HC-05 Bluetooth, ESP8266 Wi-Fi, and NRF24L01 radios.
Wiring Notes
Power the board through the USB Type-B port (5V) or via the barrel jack/VIN pin with 7–12V DC. Each I/O pin can source up to 20 mA; use external transistors or drivers for heavier loads. The CH340G requires a one-time driver installation – Windows, macOS, and Linux drivers are freely available.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with the Arduino IDE?
Yes. After installing the CH340G driver, select “Arduino Uno” under Board settings. All libraries and code examples work without modification.
Does this board come with a USB cable?
Yes, a USB Type-B cable is included in the box so you can plug in and start programming right away.
What’s the difference between the CH340G version and an original Arduino Uno?
The only functional difference is the USB-to-serial chip. The CH340G performs identically for programming and serial communication; you just need a specific driver, which is easy to install.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items