This circuit was found in a 1980s American documentation. The circuit is based on integrated CMOS 4001 that are common today. The load is a relay according to the power supply from 6 to 12 V.
This circuit was found in a 1967s Motorola documentation. The circuit regulates the voltage of an...
Found in National Semiconductor documentation from the 1990s, this circuit employs basic...
In this circuit, which uses one of the four comparators of an LM339 (or LM139 or 239), capacitor C1 and...