This circuit was found in a 1967 RCA documentation. The components are of the time. The circuit limits the current to 50 mA when the battery is fully charged.
This circuit is from a 1970 publication, having been implemented with germanium PNP transistors. We can...
This power source was found in documentation from the 1970s. The components are from the time, and...
This circuit uses a complementary unijunction transistor that is not the common type. The...