Car electrical supply electronic voltage monitor, compares buffered and Un-buffered voltages to detect supply interruptions

摘要

A car electrical supply electronic voltage monitor compares the buffered ((Vz, AD1) and Un-buffered (Ubatt, AD2) values of a voltage source using the buffer diode (D1) and capacitor (C1), extra buffer diode (D2), and voltage dividers (R3, R4), (R1, R2), using a processor to signal an alarm if the Un-buffered value falls below the buffered or a threshold for a set time.