This 80's circuit uses an audio amplifier to obtain a symmetrical source from a single source. The maximum current is on the order of 1.3 A and the input voltage must not exceed 20 V.
With this simple circuit found in an American 1980s documentation, it is possible to determine the...
This page shows a crystal oscillator for 2 MHz. Other frequencies can be produced depending on the...
This is a converter stage found in old transistor superheterodyne radios. The circuit is for...