Found in Motorola documentation from the 1970s, the circuit presented uses a component from the era that is not common today. The characteristics of the coils are given next to the diagram.
Toshiba LDO Regulators Toshiba has a wide variety of low voltage drop (LDO) linear regulators...
This is the project found in a 1981 publication, but it is still viable. It is a simple AM...
This is the circuit of a commercial flash from the 60’s. The circuit was published by the march...