Arduino Nano V3.0 Compatible Board – ATmega328P, 5V, 16MHz

If you like the Arduino Uno but need something much smaller, the Nano V3.0 is the board to pick. It is built around the ATmega328P chip, so the same sketches and libraries you already use will run on it without any changes.

The board is small enough to sit directly on a breadboard, which makes it easy to test a circuit and then move the same setup into a compact enclosure. It comes with 8 analog inputs, two more than the Uno, so connecting several sensors at once is simple.

Whether you are building a line-following robot, a temperature monitor, an LED display, or a college mini project, this board gives you reliable performance at a budget-friendly price. It is also a good first board for beginners, since there is plenty of free tutorials and community support available for the Nano.