This circuit was found in an Electronic World of 1968. The circuit uses power transistors of the time. The transistors are for 25 W of dissipation.
Found in the October 1992 Radio Electronics magazine, this oscillator is controlled by switch S1....
This variation of configuration that is common on our site was found in a 1980s documentation. LEDs can...
This circuit was obtained from a European magazine of the 1990s. The integrated circuit used is...