dc42:
oric_dan(333):
You call this "Five things I never use in Arduino projects" [my emphasis],but I might add ... external pulldowns are useful for building voltage dividers to interface
voltages outside the normal 0..Vcc range. This scheme is also especially useful on A/D
converter input channels.What I actually said I don't use is "Pullups or pulldown resistors on digital input pins used for reading switches". I guess the unspecified assumption is that I have control over how I connect both ends of the switch.
I realize that, but was thinking of expanding to more general cases.