I have a 555 one shot timer circuit in which the Trigger and Reset pins are tied together in attempt to reset the timer every time the timer is triggered so that the one shot really extends for the designed time after the last signal in a group of signals is received.
The problem I'm having is that the signals are very fast so the rest pin is not held low for long enough to actually reset the timer. Is there any hardware I can add to the circuit to artificially hold the signal low just long enough when the trigger is received to get it to actually reset? I've successfully gotten the reset to work when delaying 5ms on trigger to hold the reset pin low using firmware, but this slows down my signal processing significantly.
Is there anything I can add to the physical circuit which will hold that pin low just a tad longer?