Third-Party Arduino NANO (ATmega328PB with CH340 Chip)

Key Features:

• ATmega328PB microcontroller (drop-in compatible with many ATmega328P Arduino sketches but with extra peripherals)
   
• CH340 USB-to-UART interface for simple plug-and-play programming and serial debug (USB-C connector)
   
• Breadboard-friendly Nano form factor with standard 15 × 2 pin layout (male headers)
   
• Typical Arduino bootloader pre-burned (compatible with Arduino IDE / PlatformIO)
   
• 5V operating logic and onboard 5V regulator (powered from USB-C or VIN)
   
• Onboard power and user LEDs plus Reset button for quick debugging and development
   
• Supports standard Arduino libraries and shields that target the Nano pinout (digital I/O, PWM, ADC, I2C, SPI, UART)
   
• Low-power sleep modes available via AVR power management for battery projects
   
• Compact and inexpensive — ideal for prototyping, education, and small embedded tasks
   

 

Specifications:

• Microcontroller: ATmega328PB (Microchip/Atmel)
   
• Program/Flash: 32 KB flash memory (≈ 0.5–1 KB used by bootloader)
   
• SRAM: 2 KB
   
• EEPROM: 1 KB
   
• Typical Clock: 16 MHz crystal on board (some variants may use 8/20 MHz)
   
• Max MCU Frequency: 20 MHz (device spec)
   
• Operating Voltage (logic): 5 V (USB or VIN)
   
• Input Voltage (VIN): 7–12 V recommended through onboard regulator (check board markings)
   
• USB Interface: USB-C connector via CH340 USB↔UART bridge (auto COM port on modern OSs)
   
• Digital I/O Pins: 14 (D0–D13) — standard Nano mapping
   
• PWM Outputs: 6 (on typical Nano PWM pins)
   
• Analog Inputs (ADC): 8 (A0–A7) — 10-bit ADC channels (standard Nano layout)
   
• UART: Hardware Serial (Serial) connected to CH340 for programming; additional USARTs available on ATmega328PB (depends on board routing)
   
• SPI / I²C: SPI and I²C (TWI) available on standard Nano pins (MOSI/MISO/SCK / A4/A5 or dedicated pins depending on layout)
   
• Power LED & Status LED: Yes (power + user/serial LED)
   
• Reset Button: Yes (EN/RESET)
   
• Dimensions: Nano-form factor — approx ~45 mm × 18 mm (varies slightly by clone)
   
• Supported IDEs: Arduino IDE, PlatformIO, AVR GCC toolchain (board package & CH340 driver may be required on older OSes)
   
• Typical Current Draw: MCU idle few mA; depends on peripherals and load
   

Note: exact pin routing and additional UART/TWI/SPI availability depend on the specific clone’s PCB wiring — the ATmega328PB provides extra USART/TWI peripherals compared with ATmega328P but some clones wire only the classic Nano signals.

 

 

Applications:

• Breadboard prototyping & small embedded projects using familiar Arduino APIs
   
• Sensor nodes and data logging (multiple ADC channels, EEPROM storage)
   
• Educational projects & classroom kits — great for teaching embedded C/Arduino basics
   
• Robotics & motor control where compact 5V logic is preferred (PWM outputs available)
   
• Retrofits & replacements for projects built around the Arduino Nano footprint
   
• Low-power battery projects using AVR sleep modes and regulator configuration
   

DATASHEET:  Arduino NANO (with ATmega328PB)
Reminder: This board is BASED off the Arduino NANO, some minor differences MAY be present.