This RCA / GE circuit from the 90s can be applied to any modern operational amplifier. The number of entries (installments) can be changed depending on the application.
This circuit trips when a negative pulse is applied to its input or when the voltage drops below a...
This is an old 1988 circuit consisting of a timer or time control for exposing silk-screen arrays. The...
This circuit was taken from an old American documentation. It can be built with modern op amps. The...