Arduino Nano: Tiny but mighty

01Why pick the Nano

The Arduino Nano packs the ATmega328P into a board that drops straight into a breadboard. Same code, same pins, half the footprint.

• 22 digital I/O, 8 analog inputs.
• Mini-USB or USB-C variants.
• 5V logic, 16 MHz clock.

02First sketch

Pick Board → Arduino Nano, Processor → ATmega328P (Old Bootloader for clones), then upload Blink.

03Project ideas

• Wearable sensor logger.
• Tiny weather station.
• PCB-integrated controllers.