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Product details The Uno Board SMD CH340C is a versatile and cost-effective Arduino Uno–compatible development board built around the ATmega328P microcontroller. It uses the CH340C USB-to-UART interface, ensuring stable and reliable USB communication without requiring external drivers on most operating systems. The board supports a 16 MHz crystal oscillator, 32 KB flash memory, 2 KB SRAM, and 1 KB EEPROM. Designed with the standard Uno layout, it features 14 digital I/O pins (including 6 PWM outputs), 6 analog inputs, UART, SPI, and I2C communication interfaces. It can be powered via USB or an external DC supply, making it suitable for a wide range of electronic and automation applications. The board is fully compatible with Arduino libraries, shields, and the Arduino IDE, offering a seamless development experience for prototyping, learning, and industrial use.