Arduino Uno Rev3,
which is a popular open-source microcontroller board. It's connected to a computer via a USB cable, used for programming and power.
Key features of the Arduino Uno Rev3 include:
Microcontroller: It uses an ATmega328 microcontroller.
Input/Output Pins: It has 14 digital input/output pins (6 of which can be used for PWM output) and 6 analog input pins.