This power supply protection circuit using a relay was found in a 1967 documentation. The components are from the time, but current equivalents can be used depending on the power source current.
This circuit doubles the input voltage, converting, for example, 6 V and 12 V. The output current is...
The LM105 integrated circuit consists of a voltage regulator integrated in a metallic enclosure. The...
The CA3020 integrated circuit was one of the first commercial types, sold in the 1960s. The...