Found in a 1970s American documentation, this circuit uses components from the era that can eventually be replaced by modern equivalents. The power supply must be symmetrical.
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...