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arduino nano - Why are the pin numbers of the diagrams and of the code different? - Arduino Stack Exchange
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The Expansion Board with Yellow pin Extension Module For arduino uno nano|uno|uno arduinouno board - AliExpress
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I'm trying to do some Arduino nano circuit but which pin name should i use when i dont want to use a0,a1,ax etc.? : r/arduino
![Increasing Digital I/O Pins of Arduino uno Using 8255 Peripheral Programmable Interface with Arduino Increasing Digital I/O Pins of Arduino uno Using 8255 Peripheral Programmable Interface with Arduino](https://www.engineersgarage.com/wp-content/uploads/2019/10/intel-8255-ppi_orig-2.png)
Increasing Digital I/O Pins of Arduino uno Using 8255 Peripheral Programmable Interface with Arduino
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