Joy-IT NanoV4-3V Arduino Nano Compatible Microcontroller Board with ATmega328P, 3.3V Logic, CH340G USB

The Joy-IT NanoV4-3V is a compact microcontroller development board in the Arduino Nano form factor, engineered for 3.3V logic projects where low power and direct sensor interfacing are essential. Based on the ATmega328P running at 16 MHz, it provides a familiar Arduino programming experience with the added benefit of a CH340G USB-to-serial converter for reliable connectivity. Its breadboard-friendly design and full Arduino IDE compatibility make it an excellent choice for prototyping wearable devices, battery-powered sensors, and other 3.3V systems.

Advantages

Operating at 3.3V, this board eliminates the need for level shifters when connecting to modern low-voltage sensors, displays, and wireless modules. It retains the classic Nano pinout, so existing shields and tutorials remain applicable. The CH340G chip ensures stable USB communication on Windows, macOS, and Linux, while the preloaded old bootloader allows straightforward sketch uploads. With 14 digital I/O pins (6 PWM-capable), 8 analog inputs, and standard UART, SPI, and I2C interfaces, it covers a wide range of embedded tasks.

Suitable for

• Wearable electronics and portable devices powered by LiPo batteries
• Interfacing with 3.3V sensors, OLED displays, and RF modules
• Educational projects teaching microcontroller fundamentals
• Rapid prototyping of IoT sensor nodes and data loggers
• Replacing original Arduino Nano boards in 3.3V applications

Key specifications

• Microcontroller: ATmega328P
• Operating voltage: 3.3V
• Recommended input voltage: 7–12V (via VIN pin)
• Digital I/O pins: 14 (6 PWM)
• Analog input pins: 8
• Flash memory: 32 KB (2 KB used by bootloader)
• SRAM: 2 KB
• EEPROM: 1 KB
• Clock speed: 16 MHz
• USB-to-serial converter: CH340G
• USB connector: Mini-B
• Bootloader: Arduino Nano (old bootloader)
• Communication: UART, SPI, I2C
• Built-in LED on D13

Recommendations

For developers seeking a drop-in 3.3V alternative to the standard Arduino Nano, the Joy-IT NanoV4-3V delivers reliable performance and broad compatibility. Its low-voltage operation is particularly valuable for battery-powered and sensor-rich projects, while the CH340G ensures hassle-free programming across all major operating systems.