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Automation, sensing and robotics • Re: Measuring high voltage with RPI4B

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Our project has something to do with charging electric vehicles where users can pick which voltage/watts they need for said vehicles, where the maximum voltage is around 90V.
How do you know it's only 90V? My EV runs the DC side at up to 400V.
What are you checking the voltage with now?
You need to divide that voltage down to something manageable, you could do that with precision resistors wired as a voltage divider.

Since we're talking about voltages that are above SELV I won't discuss any details. Anything over 48V DC can kill.

Statistics: Posted by DougieLawson — Wed Jan 29, 2025 8:09 am



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