The new MyoWare muscle sensor can be multiplexed.
http://www.advancertechnologies.com/p/myoware.htmlThe new boards have jumper pads marked RAW.
To do this...
1) Take a sharp object and cut the trace between the RAW jumper pads
2) Connect the output pin of your mux to the RAW output pin on the MyoWare board
3) Connect each instrumentation amplifier's (IA) output pin to its own input on the mux. You'll need one IA for each muscle you want to measure
4) Connect the MyoWare's
- R pin to the IA's reference pin
- SHLD pin to the IA's +Vcc pin
- GND pin to the IA's -Vcc pin
5) Connect each muscle's electrodes (middle, end, reference) to the IA's + input pin, - input pin, and reference pin, respectively
We are currently working on a shield that will do this all for you but don't expect it anytime soon.