Designing an Engine Oil Temperature Display Gauge Project

[GoldOxide_imp]

GoldOxide: I don't know either if this is a common "issue". Putting together an instrument you described should not be a big hassle, but tapping into the wiring could/would (and probably invalidate warranty). Also, there are not that many analog signals I can think of. IAT more-or-less equals to ambient air temp, EOT and ECT might be interesting - what else? Will have to finish the original project anyways - still fiddling with the display...

Sure, I assume warranty was not an issue since I think for most it would have expired by now. Tapping into wiring would be a hassle yes, but there are wiring "T-like crimp devices" that connect to the circuit without cutting or scraping the wiring sheath. I was just thinking if this was an approach, all the taps can be collated at a common I/O concentrator and converted to digital. A four port concentrator probably be enough with future expansion to spare. Generic, but sure, could be overkill. It depends on future ideas I suppose.