This circuit was found in documentation from the 1980s. Transistors are general-purpose types like the BC548 for NPN and the BC558 for PNP.
This sensitive field strength meter was found in 1993 documentation. The instrument may be the...
This circuit was found in a 1967 General Electric manual. It is intended for the control of high...
The figure shows how to vary the output voltage of a 7812 regulator between 12 V and 2 V less than...