The diodes are for general use and the transistors also in this Exclusive-OR circuit. The circuit may have the values of the resistors changed to 5 V logic.
In this circuit, a unijunction transistor controls a multivibrator providing a rectangular signal...
The article is from Radio Electronics from June 1968 and already used the well-known 2N2646...
This 12 V source provides 12A of maximum current and is suitable for powering mobile equipment. The...