Considering that the Uno is much larger than the Nano, you might think it comes with a lot more pins. However, their pinouts are surprisingly similar in most aspects.

The Arduino Nano uses a bootloader for handling programming the MCU, ... (7805 vs 1117 pinout, for example) installed that “no one noticed, until ...

While the pinout is very similar to the Arduino Nano’s, there are four (12-bit) analogue inputs rather than eight (10-bit). Some digital GPIO pins are numbered differently too.

The power of Espressif’s ESP32-S3 meets Arduino’s unmatched customer experience, documentation and community — all in the compact form factor of the Nano. Provides support for both ...

Despite the differences in size and microcontroller, the Arduino Nano and Micro share some similar pinout configurations. They both have two GND pins, two reset pins, one AREF pin, and three power ...