When the power is cut off, this circuit keeps the flashlight on for a while, allowing it to be located. The circuit is from a Radio Electronics from September 1992.
This power stage with two counterphase transistors and coupling transformers was shown in Radio...
This circuit was obtained from an Electronic Design from 1964. Transistors admit modern...
This simple indicator was found in a 1980s American documentation. The circuit uses an operating system...