ok, I realize that my original question is very large so I've decided to break it down into many simple question and i'll just put it all together in the end.
I have a 12v source
I'm trying to figure how to trip the trigger on a 555 timer when the power is applied and when it's turned off.
I was thinking of putting a cap in between the source and the trigger.
Here's the question.
1) The trigger has to be 1/3 of the Vcc? so my trigger would be 4v on a 12vcc?
2) If I reduced the power down the the correct amount (as of this time 4v) then put a cap inline that would charge in 0.01 seconds. Correct me if i'm wrong, but once it charges, it will block all flow of current to the trigger UNTIL the power is pulled, then it will send the charge to the trigger letting it go again when the power is pulled.
Thanks for the help, you've all been really helpful and I'm happy I've found this forum. I really hope to actually learn this stuff and not have to ask a question every time I'm trying to do something, but right now time is somewhat of an issue for this project.
again, thanks
I have a 12v source
I'm trying to figure how to trip the trigger on a 555 timer when the power is applied and when it's turned off.
I was thinking of putting a cap in between the source and the trigger.
Here's the question.
1) The trigger has to be 1/3 of the Vcc? so my trigger would be 4v on a 12vcc?
2) If I reduced the power down the the correct amount (as of this time 4v) then put a cap inline that would charge in 0.01 seconds. Correct me if i'm wrong, but once it charges, it will block all flow of current to the trigger UNTIL the power is pulled, then it will send the charge to the trigger letting it go again when the power is pulled.
Thanks for the help, you've all been really helpful and I'm happy I've found this forum. I really hope to actually learn this stuff and not have to ask a question every time I'm trying to do something, but right now time is somewhat of an issue for this project.
again, thanks