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On the Transistor you use to switch the heater, terminal 2 you should protect it with either a TVS diode or a forward conducting diode to 12v. When the heater is powered and the sensor is suddenly unplugged, there is enough inductance and the currents are high enough that terminal 2 will spike in v...

In the "Nernst Sense" section of the circuit, instead of "LSU_Vm" consider a voltage divider with a voltage set to virtual ground + 0.45 volts. That way you are not amplifying the 0.45v common mode voltage and you can greatly increase the amplification. Because any amount of pre...

In the "Nernst Sense" section of the circuit, instead of "LSU_Vm" consider a voltage divider with a voltage set to virtual ground + 0.45 volts. That way you are not amplifying the 0.45v common mode voltage and you can greatly increase the amplification. Using "virtual groun...

https://github.com/mck1117/wideband/blob/master/board_module/export/module_schematic.pdf referring to the schematic above (it looks like the most upto date schematic on the git repo) In the "Pump Driver" section of the circuit, why is "Vm" there? In the "Nernst Sense" s...

Would it be possible to add support for the LSU-ADV sensor? It doesn't use a calibration resistor, so adapting it to a custom harness with this built into the ECU would be one step easier, right? I'm not sure what the difference on the board would need to be, could we populate a jumper for a 4.2/4....