Nano V3.0 ATmega168 CH340 USB – Arduino-Compatible – Support Documentation
The Nano V3.0 ATmega168 CH340 USB is a compact, breadboard-friendly microcontroller board based on the ATmega168. It offers similar functionality to the Arduino Uno but in a smaller form factor, making it ideal for embedded projects where space is limited.
Key Features
- Microcontroller: ATmega168
- USB-to-Serial Converter: CH340G
- Operating Voltage: 5V
- Input Voltage (recommended): 7-12V
- Input Voltage (limits): 6-20V
- Digital I/O Pins: 14 (6 PWM outputs)
- Analog Input Pins: 8 (A0-A7)
- Flash Memory: 16 KB (0.5 KB used by bootloader)
- SRAM: 1 KB
- EEPROM: 512 bytes
- Clock Speed: 16 MHz
- Dimensions: 45mm x 18mm
Pin Descriptions
| Pin | Function | Description |
|---|---|---|
| D0 (RX) | Digital I/O | Serial Receive (UART) |
| D1 (TX) | Digital I/O | Serial Transmit (UART) |
| D2 – D13 | Digital I/O | General Purpose Digital I/O Pins |
| D3, D5, D6, D9, D10, D11 | PWM | PWM Output (AnalogWrite) |
| A0 – A7 | Analog Input | Analog Inputs (10-bit ADC) |
| VIN | Power Input | Unregulated Voltage Input (6-20V) |
| 5V | Power Output | Regulated 5V Output |
| 3.3V | Power Output | Regulated 3.3V Output (max 50 mA) |
| GND | Power | Ground |
| RST | Reset | Reset Pin (Active Low) |
| AREF | Analog Reference | Reference Voltage for Analog Inputs |
Powering the Board
- VIN Pin: Connect an unregulated power source (6-20V). The onboard voltage regulator will convert it to 5V.
- 5V Pin: Connect a regulated 5V power source directly.
- USB Port: Connect via Mini-B USB cable for both power and programming.
Programming the Board
The Nano V3.0 ATmega168 CH340 USB can be programmed using the Arduino IDE. Follow these steps:
- Connect the board to your computer using a Mini-B USB cable.
- Install the CH340G driver if not already installed. The driver is necessary for the USB-to-Serial communication.
- Open the Arduino IDE.
- Select the correct board and processor:
- Board: “Arduino Nano”
- Processor: “ATmega168”
- Select the correct COM port.
- Upload your sketch.
Troubleshooting
- Problem: Sketch won’t upload.
- Solution: Ensure the CH340G driver is correctly installed. Verify that the correct board and processor are selected in the Arduino IDE.
- Problem: Board not recognized by computer.
- Solution: Check the USB cable connection. Try a different USB port or cable. Reinstall the CH340G driver if necessary.
- Problem: Unstable behavior or resets.
- Solution: Verify that the power supply can provide sufficient current. Check for loose connections or shorts.
Frequently Asked Questions
- Can I use the Nano V3.0 ATmega168 for battery-powered projects?
- Yes, its compact size and low power consumption make it suitable for battery-powered applications. Ensure that the battery voltage is within the acceptable range.
- Is the Nano V3.0 ATmega168 compatible with Arduino Uno sketches?
- Yes, as both use the ATmega microcontrollers, most sketches are compatible. Ensure the correct board and processor are selected in the Arduino IDE.
- How do I reset the board manually?
- Press the onboard reset button or momentarily connect the RST pin to GND.
Additional Notes
- The Nano V3.0 ATmega168 CH340 USB is ideal for projects where space is limited.
- It includes a Mini-B USB connector for programming and power.
- Ensure correct voltage levels when interfacing with other devices to prevent damage.