Ok, for the TLV431:
1) Bias resistor from +12 to top of regulator.
2) Nice big cap across regulator, a > 10uf electrolytic would do fine
3) Set resistors to get it to 3.0V
4) Clamp diodes going from the thermistors to the regulator
I suspect that's not any different than what you have already done.
1) Bias resistor from +12 to top of regulator.
2) Nice big cap across regulator, a > 10uf electrolytic would do fine
3) Set resistors to get it to 3.0V
4) Clamp diodes going from the thermistors to the regulator
I suspect that's not any different than what you have already done.