This circuit, from a component manual, also applies to other components in the same family. The font does not have to be symmetrical, and the characteristics are given next to the diagram.
I got this circuit from an English magazine from 1977. It can still be easily assembled, as the...
This simple lie detector was found in Popular Electronics. Transistors are commonly used. The...
Found in a 1980 documentation, this circuit drives a transducer (X1) when the car battery has its...