@zander , Thank you very much for taking the time to further trouble your mind into the problem and for your answer. You have given me food for tho...

Hey Ron , thank you for your reply. I do agree with you that mixing the libraries can cause mayhem and chaos... but not when you can put everything ba...

Thank you all for taking the time looking into this matter! Just to give some more information on what has been done so far, I have used an oscillo...

Hi Ron , thank you for your answer! I do not use a multiplexer , it is straight as shown on the diagram.

@inq Hello , Thank you for your reply ! Well I am working on a project that has the ATMEGA328 managing a keyboard on PCF8574 , an LCD screen and 8 inp...