Tech Micro How does a 4×4 Keypad work with PIC 16f877A? I know the PIC scans the row(input) and column(output) of the keypad. But how do they know which key is pressed? Can you explain as detail as possible with this drawing? http://www.electro-tech-online.com/attachments/micro-controllers/5380d1121527166-how-does-4×4-keypad-work-serkey16.gif thank you! Erm. Still don’t quite get it………. I’m going to write [...]
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