This circuit was found in the March 1979 issue of Radio Electronics magazine. Integrated circuits must be equipped with heatsinks. The maximum current is 1 A.
For those who like experimental circuits, here is a sequential flasher system with LEDs, which can be...
This circuit was found in an ancient American documentation. The integrated circuit is of the time...
This circuit was found in a 1977 Radio Shack documentation. The circuit is tuned to 1.4 kHz, but...