If i had a dual-color LED wired into a rheobus that started off blue at the lowest voltage, and turned red at the highest voltage, would it be very simple to pull the LED out and turn it around, so it started red and turned blue at higher voltage? Or would I need to add some type of resistor? Assume that the rheobus is wired correctly to begin with, that allows it to begin blue and turn red. Thanks!
Not quite as straightforward as just reversing it. The forward voltages are substantially different for red and blue. So the current-limiting resistors will be different. Without seeing the circuit, I'm reluctant to say you could reverse it if you swapped the resistors (I don't want to make assumptions about the design).
