I need a circuit (ME struggling with EE stuff). The circuit is sort of a delayed shut-off circuit.
Input is 12 VDC. Trigger is a normally open switch (close will trigger). Output needs to be normally open contacts that will close (or both ground) after a set delay (30 seconds) once triggered. Also, need the contacts to ground is power is cut. So...open contacts that close 30 seconds after a normally open switch is closed or the power is cut.
I was initially looking at some circuits for the IC555 as I have an IC555 and numerous sizes of resistors, caps, etc. But after letting the smoke out of a transistor and making some capacitors go bang, I think it is best to get some help.
Thanks.
Paul
Input is 12 VDC. Trigger is a normally open switch (close will trigger). Output needs to be normally open contacts that will close (or both ground) after a set delay (30 seconds) once triggered. Also, need the contacts to ground is power is cut. So...open contacts that close 30 seconds after a normally open switch is closed or the power is cut.
I was initially looking at some circuits for the IC555 as I have an IC555 and numerous sizes of resistors, caps, etc. But after letting the smoke out of a transistor and making some capacitors go bang, I think it is best to get some help.
Thanks.
Paul
