This circuit produces a pulse when the voltage in the regulator exceeds a certain value depending on the components. PUT is not a common component today. The circuit is from a 1970 EEE.
This ultra-low power circuit makes the LED flash. The circuit is powered by 15 V in this...
Using a component of the era, this 1968 Mallory circuit uses an output transformer whose...
Found in a 1992 book, this circuit is intended for operation with audio signals. Equivalent...