UNO R3 Development Board

Arduno Introduction
Arduno is an open-source Simple I/O platform with an easy-to-understand development environment similar to Java and C's Processing/Wiring. It allows you to quickly create interesting things with Arduno. Arduno can be used with various electronic components such as LEDs, buzzers, buttons, and photoresistors. The Arduno development environment is based on open-source principles, allowing you to download and use it to develop more amazing interactive projects.

Features
Open-source circuit diagrams and development software interfaces are available for free download and can be modified as needed. Downloading the program is simple and convenient. You can easily connect sensors and various electronic components (such as LEDs, buzzers, buttons, and photoresistors) to create a wide variety of interesting projects.
Using a high-speed microprocessor controller (ATMEGA328), the development interface and environment are very simple and easy to understand, making it ideal for beginners.

Performance Description
Digital I/O: 0~13 digital input/output terminals.
Analog I/O pins 0-5.
Supports ISP download function.
Input voltage: No external power supply required when connected to a computer's USB port; external power supply required is 5V-9V DC input.
Output voltage: 5V DC output and 3.3V DC output.
Uses Atmel Atmega328 microprocessor controller.