A less expensive option to the popular UNO R3 Arduino is the ADIY Uno R3 CP2102 ATmega328P Development Board. This development board is a great option for novices and enthusiasts alike, and it has a lot of functionality despite being less expensive.

Features of ADIY Uno R3 CP2102:

1. ATmega328P Microcontroller:

  • The heart of this board is the ATmega328P microcontroller, the same chip found in the official Arduino UNO R3. This powerful microcontroller is the brains behind your projects.

2. USB-to-Serial CP2102:

  • Unlike the UNO R3, the ADIY Uno R3 CP2102 uses the CP2102 USB-to-Serial converter for communication with your computer. This simplifies the connection process and eliminates the need for an additional FTDI module.

3. Compatibility:

  • The board is fully compatible with the Arduino IDE, making it easy to get started with programming. You can use the same sketches and libraries as you would with the official Arduino boards.

4. I/O Pins and Shields:

  • With 14 digital I/O pins (of which 6 provide PWM output) and 6 analog input pins, the ADIY Uno R3 CP2102 is versatile enough for a variety of projects. It also supports Arduino shields, allowing you to expand its capabilities effortlessly.

Getting Started:

  1. Download Arduino IDE:

  2. Select Board and Port:

    • In the Arduino IDE, navigate to Tools > Board and choose "Arduino/Genuino Uno." Then, select the appropriate port under Tools > Port.
  3. Upload a Simple Sketch:

    • Open the Blink example sketch from File > Examples > 01.Basics > Blink. This basic sketch blinks an LED connected to pin 13, allowing you to test the board's functionality.
  4. Experiment and Tinker:

    • Start experimenting with different sensors, actuators, and components. The ADIY Uno R3 CP2102 can handle a wide range of projects, from LED displays to temperature sensors.


To sum up, the ADIY Uno R3 CP2102 ATmega328P Development Board offers an affordable way to get started with Arduino. Its strong feature set and compatibility with the Arduino IDE make it a desirable option for those on a tight budget.

Whether you're an experienced maker working on a new project or a beginner learning the ropes, the ADIY Uno R3 CP2102 is a good option to consider for your next Arduino project.

Happy coding!