So the logical ground and the power ground can be different? Interesting. What is the practical use of this separation?Thank you! I just love to learn, I apologise for popping up here.
@PaulThank you very much! I imagine that if I use a shared ground for a 12 V powerful motor and a logic circuit, then at the engine start, the logic circuit could be damaged or at least experience a blackout?I do not want to hack the topic, just cant resist curiosity.
That is the reason that modern vehicles turn off all unnecessary electronics while the starter circuit is running to start the engine.