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.
March 2017 – Mouser Electronics already has the new Texas Instruments INA260 digital current and...
This circuit was found in a 90's Electronic Design. It takes advantage of the nonlinearity...
Hughes suggests this circuit in a 1968 documentation. The circuit uses old transistors that can be...