This circuit was found in a 1968 documentation. The circuit generates three rectangular signals from a 400 Hz sinusoidal input. The circuit is suitable for applications in power controls.
This circuit, which in our times would be called a shield, can also be used with other loads. The...
This circuit is from an old American documentation from the 70s. Transistor 2N3904 can be replaced by...
This application of the 555 was found in the November 1992 Radio Electronics magazine. The...