The pinout of an electronic device, or pinout, is one of the most useful reference documents and one that we will most frequently consult when performing a setup. The case of Arduino is no exception, especially considering the large number of pins and board models available.
As the complexity of our circuits increases and we start using more complex functions, such as communication between devices or interrupts, it becomes more convenient to have these schematics on hand, to quickly consult the data of each pin on the different existing boards.
Here are the pinout schematics for the main Arduino boards, which will be reference documents that we will frequently use in the rest of the blog posts.
Arduino Uno Pinout
Arduino Nano Pinout
Arduino Mini Pro Pinout
Arduino Mega Pinout
Source: The schematics in this entry are translations based on the work of pighixxx (offline since 2018) All schematics are preserved in this repo https://github.com/luisllamasbinaburo/pighixxx-uploads-archive