This circuit was found in the May 1959 Radio Electronics magazine. Its purpose is to provide bias voltages for circuits under test. The circuit is isolated from the power grid.
This circuit takes advantage of the base emitter junction of a general-purpose transistor to...
This interesting sound effect circuit that produces the sound of bulls or Bull Horn was found in...
This second-order low-pass Salen-Key filter was obtained from an American 1980s documentation. Formulas...