Found in the September 1984 issue of Radio Electronics magazine, this circuit uses common components. The trigger characteristics are given by the formula in the diagram.
Using 4 operational amplifiers this circuit generates 4 different tones. The circuit is from an...
In the figure we have an application of an oscillator 4013 as voltage multiplier. It consists of a...
This Colpitts crystal oscillator was found in an American publication for amateurs in the 1980s....