This circuit incorporates the passive control of the previous circuit and was also found in the March 1995 Electronics Now magazine. The power supply must be symmetrical.
This circuit uses a 741 operational amplifier that must be powered by a symmetrical source of 6 to...
This oscillator generates a 1 kHz signal, using an old germanium PNP transistor. The circuit was...
This circuit was obtained from a Radio Electronics issue from January 1989. The indicator is a...