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.
We found this circuit in an old publication from Argentina. The relay must be of the sensitive type,...
This common 555 circuit was found in documentation from the 90s. The circuit uses two 555s and the...
Found in a 1967 Electronics World, this oscillator changes its tone when objects move in their...