[apples000]

If you are trying to find the time between quick pulses, don't use a digital IO object, use a counter. You should leave the sensor connected the way it is now, and just use the period terminal on the counter vi in LV, or in c/java, use counter.getPeriod(). The counter uses the FPGA to count the signal really quickly just like an encoder and we've had success using this to measure our shooter's wheel speed.