howdy. i have interfaced arduino with a 4051 and 8 pressure sensors being used as tact switches. the sensors act as resistors until pressed, and the switch opens. each sensor is connected to a ~390k pullup resistor.
my problem is this: 2 of the 4051's pins "bleed" and read each others' signals. the remaining 6 inputs function fine. however, when you press hard enough on either of the 2 troublesome sensors, both input pins are triggered. note that when i press lightly on the sensors, the correct pin is read - however, with greater pressure, both pins are read.
i have checked my circuit for a short again or an incorrect correction and again, but have found nothing.
what could be causing the problem here?
thank you for your time. nym