This circuit is from old documentation, using a component that cannot be found easily today. The indicator is a galvanometer, and the input voltage is in the order of 1 V.
This 1992 circuit has a diode normally replacing the diac that is used in this type of...
This oscillator was found in the January 1996 issue of Electronics Now magazine. The frequency is given by...
This circuit divides the voltage of a source by 2, allowing its use as a symmetrical source. In...