Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments.

The Arduino Uno is a microcontroller board based on the ATmega328P. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.

Technical Specifications
• Microcontroller - ATmega328P
• Operating Voltage - 5V
• Supply Voltage (recommended) - 7-12V
• Maximum supply voltage (not recommended) - 20V
• Digital I/O Pins - 14 (of which 6 provide PWM output)
• Analog Input Pins - 6
• DC Current per I/O Pin - 40 mA
• DC Current for 3.3V Pin - 50 mA
• Flash Memory - 32 KB (ATmega328) of which 0.5 KB used by bootloader
• SRAM - 2 KB (ATmega328)
• EEPROM - 1 KB (ATmega328)
• Clock Speed - 16 MHz