I'm working on a three color signal cue light which can be operated remotely. To take advantage of commonly installed wires I am limited to 3 conductors between the control and the signal box. I've attached a graphic of what I could come up with using relays, but I'd much rather use transistors as they are much smaller and more reliable than a mechanical relay.
Unfortunately CircuitLab doesn't have a SP3T switch so for the graphic I have used two SPDT. If there is a much simpler way to do this circuit I am welcome to any suggestions, though the completed solution will need to work without a circuit board.
Unfortunately CircuitLab doesn't have a SP3T switch so for the graphic I have used two SPDT. If there is a much simpler way to do this circuit I am welcome to any suggestions, though the completed solution will need to work without a circuit board.
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