Good afternoon, I am starting with GPIO and python and the first project I wanted to do is a calendar with a led that illuminates each day of the month. I have been reading on the subject and it seems something apparently very simple, but I find a problem that I do not know how to solve:
The Rpi 1B has only 26 pins and, if I have not misunderstood, I need one pin for each LED, that is, 31 pins (one for each day of the month).
It is right? Can the project be done using only the 25 available pins? If not, can the pins be expanded in any way? In summary, how can the project be approached?