Nano V3 ATmega328P 5V Development Board with CH340G

Specifications

• Microcontroller: ATmega328P (8-bit AVR architecture)
• Operating Voltage: 5V DC
• Input Voltage (VIN): 7V - 12V (Recommended) / 6V - 20V (Absolute Limit)
• USB Interface: Reversible USB Type-C (via CH340G Chip)
• Digital I/O Pins: 14 (6 of which provide hardware PWM output)
• Analog Input Pins: 8 (A0 - A7)
• DC Current per I/O Pin: 40 mA
• Flash Memory: 32 KB (2 KB used by bootloader)
• SRAM: 2 KB
• EEPROM: 1 KB
• Clock Speed: 16 MHz

Applications

• Wearable Electronics: Small enough to be sewn into costumes or embedded in 3D printed props and cosplay gear.
• Miniature Robotics: Perfect for controlling servos, motor drivers, and sensors in mini-sumo bots or line-following chassis.
• Sensor Nodes: Read temperature, humidity, or gas sensors and transmit data via UART, SPI, or I2C.
• Custom Peripherals: Build your own macro-pads, PC performance monitors, or MIDI controllers.

Unlock New Capabilities

• The Leap: If you've mastered the basics on an Arduino Uno R3 but find it too bulky for a permanent enclosure, the Nano V3 is your next step.
• Feature Upgrade: It takes the exact same ATmega328P brain of the Uno and shrinks it down, adding 2 extra analog pins (A6, A7) while fitting perfectly across the center trench of a standard breadboard.
• Effort Level (Beginner): No new coding required. If your code works on an Uno, it works here. Just plug, upload, and shrink your project's footprint.

Package Includes:

• 1 x Nano V3 ATmega328P 5V Development Board with CH340G

Frequently Asked Questions (Technical FAQ)

• Why won't my Windows/Mac recognize the Nano V3 USB-C?
  This board uses the CH340G serial chip. You must manually download and install the CH340 driver for your operating system. Once installed, restart your IDE.
• How do I fix the "avrdude: stk500_getsync()" error?
  Go to the Arduino IDE menu: Tools > Processor and change it from "ATmega328P" to "ATmega328P (Old Bootloader)".
• Will a USB-C to USB-C cable from my laptop power this board?
  No. Most generic Nano V3 USB-C boards lack the CC pull-down resistors for USB-PD. You must use a USB-A to USB-C data cable.
• Can I power the Nano V3 with a 9V battery?
  Yes. Connect the positive terminal of the 9V battery to the VIN pin and the negative terminal to a GND pin.
• What is the difference between the Nano V3 and Uno R3?
  They share the same ATmega328P processor, meaning code is 100% compatible. The Nano is simply a smaller, breadboard-friendly version with two additional analog pins (A6 and A7).
• Do I need to solder the header pins myself?
  Yes, the board comes with headers included but unsoldered. This allows you to solder wires directly to the pads for ultra-compact projects if desired.
• Can I use the 5V pin to power my project?
  Yes, the 5V pin acts as an output when powered via USB or VIN. However, the onboard voltage regulator is small—keep current draw under 200mA to avoid overheating.
• Is it safe to supply 5V directly to the 5V pin?
  Yes, if you have a highly stable, regulated 5V power supply, you can connect it directly to the 5V pin and GND to bypass the onboard regulator.
• What is the maximum current per I/O pin?
  The absolute maximum is 40mA per pin, but 20mA is the recommended limit for continuous operation.
• Which pins support hardware PWM?
  Pins D3, D5, D6, D9, D10, and D11 support Pulse Width Modulation (PWM), marked with a tilde (~) on the PCB.
• Where are the I2C pins on the Nano V3?
  For I2C communication (like OLED screens or sensor modules), use pin A4 for SDA and A5 for SCL.
• How do I connect an SPI device?
  The SPI pins are D11 (MOSI), D12 (MISO), and D13 (SCK). The CS/SS pin is typically D10, though you can assign it to any digital pin in software.