I am using an arduino uno. I would like to know if you could use analog pins as digital pins. Also the digital pins labelled 0 and 1, can it be used as digital pins, i am asking this because its written Tx and Rx near those 2 pins. thanks

Can analog pins be used as a digital output pin?

system March 14, 2012, 5:02pm 4

Also, if I power the arduino Uno with 9V battery and the jack, can I use the 5V regulated pin to power components like LED?

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