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Arduino is an open-source electronics platform based on easy-to-use hardware and software. It consists of a single-board microcontroller, along with a development environment that allows users to write code and upload it to the board. Arduino boards are capable of reading inputs from various sensors and controlling outputs such as lights, motors, and other actuators.The hardware of an Arduino board typically includes a microcontroller chip (such as Atmel AVR or ARM), digital input/output pins, analog input pins, power pins, and a USB interface for communication with a computer.Arduino boards are programmed using the Arduino IDE (Integrated Development Environment), which is available for Windows, Mac OS X, and Linux. The IDE uses a simplified version of the C++ programming language to write code for controlling the board's behavior. Users can also take advantage of numerous libraries available online that provide pre-written code for specific functionalities.One of the key features of Arduino is its simplicity and accessibility. It was designed to be easy to use even for individuals without prior programming or electronics experience. This has made it popular among hobbyists, artists, students, and professionals alike.The versatility of Arduino has led to its application in various fields including robotics, home automation, Internet of Things (IoT), wearables, interactive art installations, prototyping of electronic devices and gadgets, education projects, and more.Arduino also has a large community with active forums where users can seek help or share their projects. The open-source nature of Arduino encourages collaboration and sharing among makers worldwide.In summary, Arduino is an open-source electronics platform that enables users to create interactive electronic projects by providing simple hardware and software tools for programming microcontrollers. It has gained popularity due to its ease-of-use and versatility in various applications.

Arduino's main products include Arduino Uno, Arduino Mega, Arduino Nano, and Arduino Leonardo.