Here's the setup, I have a uC PCB that is required to turn ON and OFF several remotely located LEDs depending on the input sensor conditions. The problem is that the uC PCB is located a couple of feet away from the LEDs. What is the best way to control a single LED from a uC I/O port that is located some two feet away from the LED? Is it best to locate a transistor or FET near the uC as and then run the long wires to and from the LED pcb? Or should I use some kind of buffer arrangement and then locate the FET or transistor near the LED? Or is it necessary to use an opto coupler or some such arrangement to control the LED? Thanks.