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Ever wish EC had a multiplexer? Well, it does!
It's just hidden...
The Binary to 7-segment Decoder packs a lot of logic punch. Just check out this circuit, which shows an example of how many logic gates are packed inside one of these. https://everycircuit.com/circuit/6121765614125056. With some clever logic manipulation and a lot of patience, you can re-purpose those logic gates for other applications. I decided to go for a multiplexer.
Unfortunately, there are a few drawbacks. First, this is only a 2:1 MUX, which is not that useful. Second, the output needs a logic inverter (NOT gate), which is what the PNP transistor is doing.
Left logic sources: Data In
Top logic source: Selection
RGB LED: Output
See part 2 of the discussion here: https://everycircuit.com/circuit/4668929775239168
4:1 MUX: https://everycircuit.com/circuit/4716273367515136
8:1 MUX: https://everycircuit.com/circuit/6477782263267328
16:1 MUX: https://everycircuit.com/circuit/6080373636988928
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