This circuit was found in General Electric documentation from 1965. The transistors are from that time. The diodes consist of a component that contained them.
The circuit below was suggested by the Motorola Linear Databook of 1990. The component used is...
This circuit is intended for testing small capacitors. What we have is an astable multivibrator, which works...
This circuit was found in an American 1980s documentation. The transistorized step is the...