Arduino Boards & Compatibles

Keyestudio UNO R3 Board - ATmega328P CH340G Arduino Compatible

The Keyestudio UNO R3 Board is a premium Arduino-compatible development board built around the reliable ATmega328P microcontroller with the CH340G USB-to-serial converter. It is the perfect starting point for electronics enthusiasts, engineering students, makers, and hobbyists across India who want to dive into the world of embedded systems, robotics, and IoT projects without breaking the bank. This board mirrors the classic Arduino UNO R3 pinout and form factor, ensuring full compatibility with thousands of existing Arduino shields, libraries, and code examples — so you can follow any Arduino tutorial seamlessly. Powered by a 16 MHz crystal oscillator, the Keyestudio UNO R3 delivers stable and precise timing for your projects. It features 14 digital input/output pins (6 capable of PWM output), 6 analog inputs with 10-bit ADC resolution, a USB connection for power and programming, a DC barrel jack for external power (7-12V recommended), and an ICSP header for advanced firmware flashing. The onboard voltage regulator allows operation from either USB (5V) or an external power supply. Each I/O pin can sink or source up to 40 mA of current, making it suitable for driving LEDs, sensors, small motors via drivers, and more. One of the standout advantages of the Keyestudio UNO R3 is its cost-effectiveness in the Indian market. While offering the same functionality as the original Arduino UNO, it uses the CH340G USB chip instead of the ATmega16U2, which significantly reduces the cost without affecting performance. The CH340G driver is easy to install on Windows, macOS, and Linux. The board also features a reset button, a power LED, and a built-in LED on pin 13 for quick blink testing. Whether you're building a smart home sensor, a line-following robot, a weather station, or just learning C/C++ programming for microcontrollers, this board is your reliable workhorse. TecnoMate ships this board with care, ensuring you receive a fully tested, working unit ready to plug into your computer and start coding within minutes.