Here are two circuits I've put together. One is a voltage divider and the other is an optocoupler setup. The positive inputs on the VD setup has a cap and zener for debouncing and has pulldown resistors. The negative inputs have a pullup resistor. The VD setup allows for only one input to trigger a new routine. The opto setup requires the LED circuit to be completed in order to trigger a new routine, so the setup has to work as a pair instead of individually.

In this case, is the VD setup the better setup to use? Disregard the resistor values and they were just thrown in there.

Thanks,
Tony
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