Here's a 1:8 bit DEMUX using my Binary to 7-segment Decoder hack.
To get 1:8, I strung together one 1:2 and two 1:4 DEMUXs. Those circuits can be found here if you're interested: https://everycircuit.com/circuit/6396779649826816 and https://everycircuit.com/circuit/4668929775239168
I only need 3 decoders instead of the 7 my 8:1 multiplexer needed. Pretty efficient.
For reasons I don't fully understand, inverting demultiplexers apparently can not be cascaded, like inverting multiplexers. I tried it, and the output was wrong. Each stage must be inverted first before sending it to the next stage.
For the observant, if you cycle through all the channels, you may notice a nice light show as each RGB LED's color blends into the next.
Have fun!
Left logic source: Data In
Top logic sources: Selection
RGB LEDs: Outputs
8:1 MUX https://everycircuit.com/circuit/6477782263267328
1:16 DEMUX https://everycircuit.com/circuit/4800697325060096
