This circuit allows you to read capacitances on a common analog instrument. It is part of an article in the April 1990 Radio Electronics magazine.
This old configuration of an audio amplifier has a push-pull two-transistor output stage. Output...
This is the traditional configuration of na Astable Multivibrator using two NPN ttransistor....
This circuit is from 1987 documentation. The operating system used is not common today, but two...