ARDUINO UNO ATMEGA328P + CH340

The Arduino UNO ATmega328P + CH340 is one of the most popular open-source microcontroller development boards used for learning electronics, embedded systems, automation, and IoT applications. Built around the powerful ATmega328P microcontroller, this board offers a simple and flexible platform for beginners and advanced developers alike.

This version includes several hardware improvements compared to older models, including additional pin rows for easier connection using Dupont wires and expanded wiring flexibility for prototyping projects. It also replaces the ATmega16U2 USB interface with the cost-effective and widely supported CH340G USB-to-serial converter.

The board operates at 5V and provides 14 digital I/O pins, including 6 PWM outputs, along with 6 analog input pins for sensor interfacing. It supports USB programming through the Arduino IDE and is compatible with a wide range of shields, modules, and sensors.

With onboard flash memory, SRAM, EEPROM, and a 16MHz clock speed, the Arduino UNO is suitable for robotics, automation systems, educational projects, smart devices, and rapid prototyping.

Specifications

• Microcontroller: ATmega328P
• USB Interface Chip: CH340G
• Operating Voltage: 5V
• Recommended Input Voltage: 7V – 12V
• Input Voltage Limits: 6V – 20V
• Digital I/O Pins: 14
• PWM Output Pins: 6
• Analog Input Pins: 6
• DC Current per I/O Pin: 40mA
• DC Current for 3.3V Pin: 50mA
• Flash Memory: 32KB (0.5KB used by bootloader)
• SRAM: 2KB
• EEPROM: 1KB
• Clock Speed: 16MHz

Applications

• Arduino learning and education
• Robotics and automation projects
• Sensor interfacing applications
• IoT and smart home systems
• LED and display control
• DIY electronics projects
• Data acquisition systems
• Motor and actuator control
• Embedded system prototyping
• Interactive electronic devices