How to use pin 0 and 1 of Arduino Uno

Kitflix has currently more than 5000 students from 150+ countries. We’re slowly progressing towards becoming a community of like minded people who love to experiment on embedded systems, IoT and all things electronics and coding.

Please join kitflix by enrolling to any one of free courses mentioned below

If you like our videos, do subscribe to our channel.

Hope you'll enjoy the series Tutorials.

To support our work, please go to

Thank you

Thank you for watching :)

[coriscotupi]

So, inputs 0 and 1 could be used normally as inputs:

pinMode(0, INPUT_PULLUP);
pinMode(1, INPUT_PULLUP);



...and have pushbutton switches connected from them to ground for doing something useful, as long as the pushbuttons are not pressed while loading the program or otherwise using the serial port.

Is the above correct?

[N.g.Chanal]

thanx sir for new topic.
but in datasheet mention 23 digital pin in nano.
but how?

[sreeharika]

sir Even make a video on How do sensors work internally and how do they sense and internal functioning of sensors please sir i have faced this question in interview but couldn’t find proper answer for this

[OmegaCreationsChannel]

thanks, great and helping informations to the point :)