I got more fabric paints to try, and I was right; it does work better with lighter shades. All of the new paints work well. In the picture I like the top blue and the bottom green the best out of the new ones. That green is a different brand from the rest of the colours and it isn't as shiny. I think overall I like that non-shiny look better, but the paint bottle itself has a bit of a difficult applicator than the other bottles. I would have to use a paint brush to use it accurately. The lighter orange still looks fairly close to red. I also noticed that these fabric paints soak right in to the fabric. So I bought a bag that is made for these kinds of crafts and plan to take it apart and sew it into gloves for performance.
I also finished soldering headers to all of the 16 channel multiplexers that I had. I mix-matched different colours so I wouldn't confuse them.
6. Green/Red: 4/5 bleeds, 1/5 bleeds, 9/12 bleeds, and 10/15/16 bleeds.
7: Blue/Yellow: 1/15/16 bleeds, 13/15/16 bleeds
8. White/Red: Most pins read values around 41-43 (pins: 2, 4, 6, 7, 8, 10, 11, 12, 13, 14). Pin 3 sits at around 901-904. Pin 5 sits at 1024 and is unresponsive (all the rest do work even if they sit at strange values) . 15/16 bleed.
9. Red/Blue: 13/15/16 bleed. It was then that I noticed that when 13 is triggered, 15/16 or always lower than 13. So it is easy enough to program to ignore that and only trigger 15/16 when their values are much higher.
10. Blue/Green: 2/15/16 bleed (pin 2 is like how pin 13 behaved last time). 13/15/16 bleed.
11. White/Yellow: 13/15/16
Pins 15/16 consistently are equal with all of my chips, no matter what else is happening. It makes me think perhaps there is something that I missed that is causing that. I will test with one of the best boards and hook it all up with other FSRs and my other HUZZAH feather to test. If it has identical behaviour with the breadboard as the with the main circuitboard, then I know it is something that this chip does. So in reality it might actually be more of a 15 channel multiplexer than a 16 channel one. False advertising!
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If you are looking for a summary for my Masters thesis, it is here.