If I have circuit with arduino that carries a load of say 300mA(a stepper motor). Can a single arduino ground pin sink 300mA?
the second post here seems to say yes https://forum.arduino.cc/index.php?topic=305906.0
This says no http://arduino-info.wikispaces.com/ArduinoPinCurrent
"In electronic circuit theory, a "ground" is usually idealized as an infinite source or sink for charge, which can absorb an unlimited amount of current without changing its potential." per wikipedia