Item specifics
Description
ATmega328P V3.0 development board with onboard CH340G USB to serial chip. 5V supply, 16MHz crystal. All IO pins broken out. Supports Arduino IDE programming. Ideal for Arduino prototyping, sensor experiments, robot control, DIY electronics
ATmega328P V3.0 development board Application features:
◆ Main Chip
ATmega328P (with Arduino Bootloader)
◆ USB to Serial Chip
CH340G / CH340C (compatible)
◆ Operating Voltage
DC 5V
◆ Crystal Frequency
16MHz
◆ Memory
Flash: 32KB (~0.5KB used by bootloader)
SRAM: 2KB
EEPROM: 1KB
◆ Serial Communication
1 hardware UART (via USB virtual COM port)
◆ Onboard Resources
USB port (Mini/Micro/Type-C depending on version)
Reset button
Power LED
Pin 13 LED
ICSP header
◆ Programming Methods
Arduino IDE (via USB)
ISP programmer (via ICSP header)
ATmega328P V3.0 development board Typical Applications
Arduino prototyping
Sensor data acquisition
Robot control
LED lighting control
Smart car
DIY electronics
Maker education
ATmega328P V3.0 development board Key Advantages
Arduino UNO compatible (V3.0 version)
Onboard USB (no external programmer needed)
Cost-effective CH340G
All pins broken out
Plug-and-play
Rich tutorials and examples
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FAQ
1.What is this ATmega328P development board (V3.0, CH340G) and its key specifications?
This is a compact Arduino‑compatible board built around the ATmega328P microcontroller running at 16 MHz. It provides 32 KB of Flash (2 KB used by bootloader), 2 KB of SRAM, and 1 KB of EEPROM. The board uses a CH340G USB‑to‑serial converter (instead of the more expensive FTDI chip) and operates at 5 V logic levels. It offers 14 digital I/O pins (6 with PWM), 8 analog inputs, and standard interfaces: UART, SPI, I2C. It can be powered via the USB port (5 V) or an external 6–12 V DC input on the VIN pin (recommended 7–12 V). The board is a popular, cost‑effective alternative for Arduino projects.
2.How do I set up and program this board with the Arduino IDE?
Install the Arduino IDE, connect the board via a USB cable, and install the CH340 driver if your computer does not recognize it (see next question). In the IDE, go to Tools → Board → Arduino Nano (or Arduino Uno, depending on the board layout). Then select Tools → Processor → ATmega328P (or ATmega328P (Old Bootloader) if you encounter upload errors). Choose the correct COM port and click Upload. The on‑board CH340G handles USB‑to‑serial conversion automatically, and no external programmer is needed.
3.How do I install the CH340G driver on Windows, macOS, or Linux?
The CH340G is a common USB‑to‑serial chip that requires a driver on most operating systems. Windows: Download the CH341SER driver from the manufacturer’s website, unzip, run the installer, and reboot. The board will then appear as a COM port in Device Manager. macOS: Download the CH34x driver from a trusted source, install it, and allow the kernel extension in Security & Privacy. Linux: Most modern distributions include the driver out of the box; if not, install it via your package manager (e.g., sudo apt install ch340). Once the driver is installed, the board is recognized immediately.
4.What are the differences between this board and an official Arduino Nano or Uno?
Functionally they are identical — same ATmega328P microcontroller, same clock speed, same pinout (if it follows the Nano layout). The main difference is the USB‑to‑serial chip: official boards use an FTDI FT232RL or an ATmega16U2, while this board uses the CH340G. This makes the clone board significantly cheaper, but requires a one‑time driver installation. The CH340G works perfectly once the driver is installed, and all Arduino libraries and shields are fully compatible. There is no difference in performance or programming.
5.What is the pinout and how many I/O pins are available?
If the board follows the Arduino Nano form factor, it provides 14 digital I/O pins (D0–D13), of which 6 support hardware PWM (D3, D5, D6, D9, D10, D11). There are 8 analog input pins (A0–A7). Communication: UART (TX/RX on D0/D1), I2C (SDA/SCL on A4/A5), and SPI (D10–D13). The board also breaks out RESET, 3.3 V, 5 V, GND, VIN, and AREF pins. The pin spacing is breadboard‑friendly (2.54 mm).
6.How do I power the board, and what is the recommended voltage?
The board can be powered in three ways: 1) through the USB port (5 V) — the simplest method for programming and testing. 2) by applying an unregulated 6–12 V DC to the VIN pin (recommended 7–12 V). 3) by providing a regulated 5 V directly to the 5V pin (do not connect USB simultaneously). The on‑board 3.3 V regulator can supply a small amount of current (up to 50 mA) for external sensors. The board draws about 19 mA in normal operation.
7.How much memory does the ATmega328P have, and what can I fit?
The ATmega328P provides 32 KB of Flash (with about 30 KB usable after the bootloader), 2 KB of SRAM, and 1 KB of EEPROM. This is enough for moderately complex sketches — you can run multiple libraries (sensors, displays, simple communication) but must watch SRAM usage when using large arrays or strings. For projects that outgrow this memory, consider the Arduino Mega 2560 or an ESP32.
8.What should I do if the board is not recognized or uploads fail?
Common solutions: 1) Missing CH340 driver — install the driver as described above. 2) Bad USB cable — some cables are power‑only; try a data‑capable cable. 3) Wrong board/processor — ensure “Arduino Nano” and “ATmega328P (Old Bootloader)” are selected in the IDE. 4) Bootloader corrupted — use an ISP programmer (e.g., another Arduino or USBasp) to burn a fresh bootloader. 5) Power short — disconnect all external hardware and test the bare board. Also try a different USB port and restart the IDE.
9.Can I use this board as an ISP programmer for other AVR chips?
Yes. With the ArduinoISP sketch loaded, the board can act as an In‑System Programmer (ISP) to program bare ATmega328P chips or burn bootloaders onto other AVR microcontrollers. The CH340G does not affect this functionality — the ATmega328P handles all ISP signalling. The ICSP header (if present) or the digital pins (D11, D12, D13 + RESET) are used for programming. This is a handy feature for creating custom breadboard Arduino circuits.
10.What are the most typical applications for this ATmega328P development board?
It is used in exactly the same way as an official Arduino Nano/Uno — sensor data logging, motor control, home automation, LED projects, educational kits, and rapid prototyping. Its low cost makes it ideal for projects where the board may be permanently embedded, and the CH340G USB interface provides reliable, driver‑based connectivity with no performance penalty.