I have a circuit that's driven through a relay that I want to stay on for about 5 seconds after the power is cut off. I've tried using a transistor/electro cap and a 555 for the delay but can't seen to get either to give me the delay I want. What I did find that works however is using two large elctro caps in parallel to the relay coil. But now I want to add an led circuit using the same power source and want it to shut offthat shuts off when I cut the power. Problem is when I install a 4001 diode to prevent reverse current flow as the cap discharges I get a short (high amp) when I power up. Not sure why that it is but I do.
So I'm wondering if anyone has any thoughts or suggestions nthat might help solve this caper. Truly would appreciate!