This circuit uses unusual Motorola components. The circuit was suggested in the 1990 Linear Databook. Transistors can be replaced with equivalents.
The base of this circuit is one of the four Norton amplifiers existing in an LM3900 integrated circuit....
This simple CMOS metronome circuit can be mounted in a small box, providing both sound and light...
This circuit of an old American publication uses RF transistors to obtain unit voltage gain, but...