555 monostable circuit
Hi
Regards the schematic, that's a fair point, sorry.
Its the Maplin's 555 Monostable Switch project, that I thought I might adapt to suit my needs, but it didn't come with a schematic, and like an idiot I didn't draw one.
(I can demount the circuit, but it takes a while and I can't do that until this evening. Then, of course, the shops are shut, so I can't go and buy the bits I need! So my preferred way is to buy a bag of bits that should cover what I need, so I don't get part way again like I did last night).
I tested it out in the house on a 12V battery and it worked fine, but now its hooked up in the car it only triggers at power-up if its been left off for a long while.
It has a switch to trigger the 555, and when pressed that still produces the required "on" period.
Googling, I find many solutions to the problem of unwanted triggering at power-on, struggling to find how to force it to happen!
I'll give the diode a try this evening, I assume any low value signal diode will do?
Equally, I can junk this circuit and start again, if there's a better way of doing this - doesn't have to be a 555. Need to light a small bulb for ~ 5 secs when power is applied.
Thanks for the help, and sorry to be so sparce with info.
Nige