This circuit, found in a 1958 magazine, is for reference only, since the components are not easy to find today. The transistors are germanium types and power supply is made by common cells.
This circuit is from a 1968 documentation using one of the first integrated circuits available at the...
This circuit was obtained from an ancient American documentation. The coil consists of 80 to 100...
We find this automatic battery charger in an 80s ON Semiconductor circuit and application manual. Bridge...