By Kalagaraz - Mon Nov 29, 2010 12:32 am
- Mon Nov 29, 2010 12:32 am #114455
What would happen if I used an output pin as an input? Let's say I want to make double LED matrix. Since LEDs are diodes, I could basically put 2 LEDs per matrix cell and face them opposite directions. Like say Row 15 pin is +5v and Column 15 pin is 0V an LED will light, I then switch them Row 15 pin 0v and Column 15 pin +5v, the other LED lights. Will this damage the arduino? having +5v come into a pin set as an output?