I'm using an Arduino Uno rev.3 and i started wondering . Would it be bad for the board to connect the 5V VCC pin to the serial TX output pin ( even over time ) ?
Yes of course it would, the TX pin will be in output mode during upload and any time Serial transmission happens, It will switch between 5v+ & GND, and when it is the latter state, there is 5v on the pin which is grounded, without any current limiting. The pin will burn instantly.
and that's bad . Thanks
Or logic HIGH and logic LOW as by definition/design 5V is the solid 5V rail and GND is the solid 0V without any pull-up or pull-down respectively?
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.