To simply state the current setup, I have a remotely located red LED fed by a 2 cond wire from a locally located switch with power. I want to add a 2nd LED (green) alongside the red LED and have the ability to simultaneously turn one off and the other on. So they both would never be on at the same time. And it is not practical to run another wire.
So is there a simple way to control the on/off state of the LEDs by supplying different voltages? I could switch the voltage locally to a range from 5v to 12v and adjust the current limiting resistor. I'm thinking zener diodes located at the LEDs might be a way but I am not sure of the type or circuit design.
So is there a simple way to control the on/off state of the LEDs by supplying different voltages? I could switch the voltage locally to a range from 5v to 12v and adjust the current limiting resistor. I'm thinking zener diodes located at the LEDs might be a way but I am not sure of the type or circuit design.
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