This circuit was found in a 1971s English magazine. We can still assemble it using BC548 transistor. The other components are common. The supply voltage of 6 or 12 V depends only on the relay.
This circuit was found in Linear Technology documentation from the 90s. The circuit uses the...
Found in Electronics now, this circuit generates signals given by the formulas next to the...
This power supply is not protected from shorts in the output. Output voltage is given by the...