Grossel
Well-Known Member
Hi.
The goall is to built a simple RC delay circuit that has a cap discharge function. I'm not going to use any 555/556 timing circuits.
I do have some circuits that works. Common to them all is that whenever the circuits trigs, I cannot know the initial voltage of the cap. It would possible be some between 0V and 0,6V.
First circuit: Part of the problem is also that discharge procedure may discharge cap down to 0.6V and not completely to zeero.
Latter circuits: If it takes minutes between each trigger event, nobody knows the caps initial voltage. Basic problem.
Do you have some idea how I can improve (some of if not all of) those circuits so I can know for sure the initial voltage of the cap.
Thanks
[edit]
The transistor continue conducting after the flip flop was reset. So I figured out that first design doesn't have the error I described above. However, the resistor (forgot to draw it between !Q and transistor base) will waste some effect, so I have to solve that now.
The goall is to built a simple RC delay circuit that has a cap discharge function. I'm not going to use any 555/556 timing circuits.
I do have some circuits that works. Common to them all is that whenever the circuits trigs, I cannot know the initial voltage of the cap. It would possible be some between 0V and 0,6V.
First circuit: Part of the problem is also that discharge procedure may discharge cap down to 0.6V and not completely to zeero.
Latter circuits: If it takes minutes between each trigger event, nobody knows the caps initial voltage. Basic problem.
Do you have some idea how I can improve (some of if not all of) those circuits so I can know for sure the initial voltage of the cap.
Thanks
[edit]
The transistor continue conducting after the flip flop was reset. So I figured out that first design doesn't have the error I described above. However, the resistor (forgot to draw it between !Q and transistor base) will waste some effect, so I have to solve that now.
Last edited: