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Author Topic: safely interface with car sensors. Grounding and voltage (non OBDII)  (Read 571 times)
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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?
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Jax Florida
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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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