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Originally Posted by flat5
Diplomacy aside:
The problem as stated is to switch between two LEDs. 20ma or less is typical.
I happen to think (at this time) that my circuit is best because it will work off of a single supply voltage of 3 to 24 volts by changing the resistors (at the extreme voltage ends),
and not requiring any extra current, to drive a relay, for example.
For switching AC or dirty voltages and/or high current loads, yes, a relay is a very good choice. If you have a small low current relay handy and this is an automotive application then a relay is a good solution to the problem.
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Yes if you just want to answer the question then your circuit is pretty good but really who uses a key switch just to turn on/off two LED's and nothing else. But that's just me, maybe the key is just so no one can change the lights on him but it'll be the first time I've ever encountered such idea.