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General Mach Discussion / Re: Selecting Jumpers COM & PULL UP/DN
« on: June 24, 2022, 09:51:39 PM »
Hi,
whether you require pull-up or pull-down is determined by your hardware.
For instance if have a number of switches wired in series with Normally Closed contacts to 0V, if you have a pull-up resistor the input
will be pulled low (countering the pull-up resistor) UNTIL such time as one of the switches goes open, then the input will be pulled high.
So your choice of pull-up or pull-down is determined by how you want to wire your switches.
Craig
whether you require pull-up or pull-down is determined by your hardware.
For instance if have a number of switches wired in series with Normally Closed contacts to 0V, if you have a pull-up resistor the input
will be pulled low (countering the pull-up resistor) UNTIL such time as one of the switches goes open, then the input will be pulled high.
So your choice of pull-up or pull-down is determined by how you want to wire your switches.
Craig