I have been trying to design a trigger lockout circuit and I have been having some difficulties.
The circuit is taking as an input a 3.3v pulse. These inputs can happen randomly and what I would like is a circuit that acts as a gatekeeper to determine which trigger signals get through. The criteria that determines weather or not a given signal gets transmitted is if 3 seconds have passed since the last trigger that went through successfully.
Ignoring component values the circuit that I have been messing around with is in the image below.
This design doesn't quite work, and I was wondering if anyone here had any thoughts on how I might make such a circuit? It is also a requirement that the output signal also be 3.3 volts or at least close to it.