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Topic: safely interface with car sensors. Grounding and voltage (non OBDII) (Read 973 times) previous topic - next topic


I'm building an electronic gauge, logger for my car. I want to read an oil temp sensor and some of the outputs from the computer. Can I safely use the car ground to interface with these instruments?


Yes, most car sensors are 5v or just a variable resistance reading already.

As long as you have common grounds you should be able to take readings with a microcontroller.

Always check with a DMM first.

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