Detecting Multiple Switches/Buttons


i using arduino uno r3 12v power supply funning 12v motor.  have 8 switches don't anything, either off or on , need able tell ones on @ given moment.  have found numerous discussions various configurations 1 resistor, 8 resistors or different value resistor each switch.  cautions resistors - power side, ground side, before pin, after pin in order avoid noise.  , twist wires avoid noise.  since packing 8" box suppose noise concern.  being novice research has been bit confusing.

so, question is, work?  can away using few pins?  (i have other things use pins for)

thanks insight can offer.



looks have inputs connected gnd.



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