The Arduino Nano v3 ATMEGA328P - CH340 is a small and affordable microcontroller board that is compatible with the Arduino IDE. It features the ATmega328P microcontroller and CH340 USB-to-serial chip and offers 14 digital input/output pins, 8 analog inputs, and a 16MHz quartz crystal. The board is designed for use with breadboards and is compact enough to be integrated into projects with limited space. The unsoldered version allows for greater customization and flexibility when assembling the board into a project.

 

Package Includes:

• 1 x Arduino Nano v3 ATMEGA328P - CH340 Unsoldered

 

Features:

• Small size and compact design (45mm x 18mm)
• 14 digital input/output pins
• 8 analog inputs
• 16MHz clock speed
• 32KB flash memory for storing code
• 2KB SRAM for storing variables
• 1KB EEPROM for storing data
• Built-in USB port for easy programming and debugging
• Compatible with Arduino IDE
• CH340 USB-to-serial chip for serial communication
• Power jack for external power supply
• Supports I2C, SPI, and UART communication protocols
• Breadboard-friendly design for easy prototyping and development
• Can be powered via USB or external power supply
• Unsoldered version for greater customization and flexibility when assembling the board.

 

Description:

The Arduino Nano v3 ATMEGA328P - CH340 is a popular microcontroller board that is based on the ATmega328P microcontroller chip, which is the same chip that is used in the Arduino Uno board. The Nano is a compact board, measuring just 45mm x 18mm, making it a popular choice for projects with limited space. The board is designed to be used with breadboards, making it easy to connect external components such as sensors and actuators. The board features 14 digital input/output pins, 8 analog inputs, and a 16MHz quartz crystal. It also has a micro USB port for connecting to a computer or other devices and a power jack for an external power supply. The CH340 USB-to-serial chip is used for serial communication with a computer, allowing for easy programming and debugging using the Arduino IDE. One advantage of the Arduino Nano v3 ATMEGA328P - CH340 is that it is compatible with the Arduino IDE, which is a software development environment that makes it easy to write and upload code to the board. The IDE includes a range of libraries and example codes that can be used to get started with a wide range of projects. The unsoldered version of the board is ideal for those who want greater flexibility when assembling the board into a project. This version comes with the components unassembled, allowing for greater customization and modification of the board. However, it does require some basic soldering skills to assemble the components onto the board.

 

Principle of Work:

The Arduino Nano v3 ATMEGA328P - CH340 board is based on the ATmega328P microcontroller, which is the board's brain. The microcontroller is responsible for controlling the inputs and outputs of the board, executing the program code, and communicating with external devices via serial communication or other protocols. The CH340 USB-to-serial chip on the board is used for serial communication with a computer, allowing for easy programming and debugging using the Arduino IDE. When the board is connected to a computer via USB, the CH340 chip creates a virtual serial port on the computer. The Arduino IDE uses this serial port to upload the program code to the microcontroller on the board. When you write a program using the Arduino IDE, the code is compiled and uploaded to the board via the USB port. The program code is stored in the flash memory of the microcontroller. When the board is powered on or reset, the microcontroller executes the program code, controlling the inputs and outputs of the board based on the logic of the program. The Arduino IDE includes a range of libraries and example codes that can be used to get started with programming the board. The IDE also includes a serial monitor, which allows you to send and receive data between the board and the computer via the serial port.

 

Pinout of the Board:

Pin	Name	Function
1	D13	Digital output (SPI clock)
2	D12	Digital output (SPI MISO)
3	D11	Digital output (SPI MOSI)
4	D10	Digital output (SPI chip select)
5	D9	Digital output (PWM)
6	D8	Digital output (PWM)
7	D7	Digital output
8	D6	Digital output (PWM)
9	D5	Digital output (PWM)
10	D4	Digital output
11	D3	Digital output (PWM)
12	D2	Digital output
13	D1	Digital output
14	D0	Digital input/output
15	AREF	Analog reference voltage input
16	A0	Analog input
17	A1	Analog input
18	A2	Analog input
19	A3	Analog input
20	A4	Analog input/output (I2C SDA)
21	A5	Analog input/output (I2C SCL)
22	RESET	Reset
23	5V	Power supply (5V)
24	GND	Ground
25	Vin	Power supply input (7-12V)
26	NC	Not connected

 

 

Applications:

1. Robotics: The board can be used in various robotics applications, such as controlling motors and sensors.
2. Home automation: The board can be used to control home appliances and lights using relays and other electronic components.
3. IoT projects: The board can be used to build various IoT projects such as weather stations, smart locks, and other connected devices.
4. Wearables: Due to its small size, the board can be used in wearable technology applications such as smartwatches and fitness trackers.
5. Education: The board is commonly used in educational settings to teach basic electronics and programming concepts.
6. DIY projects: The board can be used in various DIY projects such as building a remote-controlled car or a home automation system.
7. Data logging: The board can be used to log data from sensors and other inputs to an SD card or a computer.

 

Circuit:

No need for a circuit we will use the onboard LED on Pin 13.

 

Library: 

Steps to download and use the Arduino Nano v3 ATmega328P with CH340 for the first time:

• Download and install the Arduino IDE: Go to the official Arduino website (https://www.arduino.cc/en/software) and download the latest version of the Arduino IDE for your operating system. Follow the installation instructions provided.
• Before Connecting the board to your computer: Connect your Arduino Nano board to your computer using a USB cable. 

1. Go to the official website of the CH340 driver provider: You can download the CH340 driver from various sources, but it's recommended to download it from the official website of the provider. One such provider is WCH (http://www.wch.cn/download/CH341SER_ZIP.html).
2. Download the driver: On the website, find the appropriate driver for your operating system and click on the download link. The driver is usually available in the form of a ZIP file.
3. Extract the ZIP file: After the download is complete, extract the ZIP file to a folder on your computer.
4. Install the driver: Double-click on the extracted file and follow the installation instructions provided. The installation process may vary depending on your operating system.
5. Connect your device: Once the driver is installed, connect your device (Arduino board) to your computer using a USB cable. The driver should be automatically detected and installed by your operating system.

• Select the board type: Open the Arduino IDE, go to the Tools menu, and select the Board type as "Arduino Nano". Then, select the Processor as "ATmega328P".
• Select the serial port: Go to the Tools menu and select the Serial port that corresponds to the USB port your board is connected to.
• Upload a sketch: Open an example sketch or write your own code, and click the "Upload" button to upload the sketch to the board. The onboard LED should blink once the upload is complete.
• Verify the output: Open the Serial Monitor (Tools menu > Serial Monitor), and set the baud rate to 9600. You should see the output of your sketch printed in the Serial Monitor.

That's it! You have successfully downloaded and used the Arduino Nano v3 ATmega328P with CH340 for the first time.

 

Code:

an example sketch that you can use to control the onboard LED in Arduino Nano using the Serial Monitor:

void setup() {
  pinMode(LED_BUILTIN, OUTPUT); // set the LED pin as output
  Serial.begin(9600); // initialize the Serial Monitor
}

void loop() {
  if (Serial.available()) { // if there's data available in Serial Monitor
    char command = Serial.read(); // read the incoming command
    if (command == '1') { // if the command is '1'
      digitalWrite(LED_BUILTIN, HIGH); // turn on the LED
      Serial.println("LED turned on"); // print message to Serial Monitor
    }
    else if (command == '0') { // if the command is '0'
      digitalWrite(LED_BUILTIN, LOW); // turn off the LED
      Serial.println("LED turned off"); // print message to Serial Monitor
    }
  }
}

• Upload the sketch to the Arduino Nano using the Arduino IDE.
• Open the Serial Monitor (Tools menu > Serial Monitor).
• Set the baud rate to 9600.
• Type '1' and press Enter to turn on the LED. Type '0' and press Enter to turn off the LED. You should see the messages "LED turned on" or "LED turned off" printed in the Serial Monitor, and the LED on the Arduino Nano board should turn on or off accordingly.

 

Technical Details: 

• Microcontroller: ATmega328P
• Operating Voltage: 5V
• Input Voltage (recommended): 7-12V
• Input Voltage (limit): 6-20V
• Digital I/O Pins: 14 (of which 6 provide PWM output)
• Analog Input Pins: 8
• DC Current per I/O Pin: 20 mA
• DC Current for 3.3V Pin: 50 mA
• Flash Memory: 32 KB (ATmega328P) of which 2 KB used by bootloader
• SRAM: 2 KB (ATmega328P)
• EEPROM: 1 KB (ATmega328P)
• Clock Speed: 16 MHz
• USB to serial converter: CH340G

 

Resources:

• Tutorial 
  
  

Comparisons:

A comparison between the Arduino Nano v3.0 ATmega328P-CH340 unsoldered and the official Arduino Nano v3.0 ATmega328P board:

• Microcontroller: Both boards use the ATmega328P microcontroller.
• Operating Voltage: Both boards operate at 5V.
• Input Voltage (recommended): The recommended input voltage for the official Arduino Nano is 7-12V, while the recommended input voltage for the CH340 unsoldered version is not specified.
• Input Voltage (limit): The input voltage limit for the official Arduino Nano is 6-20V, while the input voltage limit for the CH340 unsoldered version is not specified.
• Digital I/O Pins: Both boards have 14 digital I/O pins.
• PWM Output Pins: Both boards have 6 PWM output pins.
• Analog Input Pins: Both boards have 8 analog input pins.
• DC Current per I/O Pin: Both boards can supply up to 20mA per I/O pin.
• DC Current for 3.3V Pin: The official Arduino Nano can supply up to 50mA for its 3.3V pin, while the CH340 unsoldered version does not specify a current rating for its 3.3V pin.
• Flash Memory: Both boards have 32KB of flash memory.
• SRAM: Both boards have 2KB of SRAM.
• EEPROM: Both boards have 1KB of EEPROM.
• Clock Speed: Both boards have a clock speed of 16MHz.
• USB to Serial Converter: The official Arduino Nano uses an FTDI FT232RL USB-to-serial converter chip, while the CH340 unsoldered version uses a CH340G USB-to-serial converter chip.