The engine temperature sensor should read up to 4.5 volts when cold and about 1 volt when hot. Note that the read out indicators should be observed throughout the warm up phase in case the sensor goes open circuit during the warm up phase. The manifold air pressure sensor and turbo pressure sensor should fluctuate be...
Coming back to the mains zero crossing issue, in a converse situation while the mains is nearing or crossing the zero line of its phase cycle, it can be considered to be in its weakest zone in terms of current and voltage, and any gadget switched ON at this instant can be expected to ...