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Thermocouple mux 16 ch(4067) + A/D max187



i'm building a 16 ch nterface for reading 16 TC type K.
I want switch the 16 TC only on positive wire and negative in common on
ground with 74hc4067.
Aftert the mux i place a AD595 and after a max 187 for reaDIN ON
PARALLEL PORT on PC.
Somebody has already made this?
Do you think that is function?
Any tips?

Ciao,
Massimo



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