I think you are responding to my post about the N&V article, but I am not the OP, so I don't know what his size limitations are. With regard to your question about capacitor size, I assume you are referring to a 555 circuit. In that case, the combinations of R1/C1 that (according to the formula) will work for 11 seconds are: 1 MegOhm/10 μF, 10 MegOhm/1 μF, 100 MegOhm/.1 μF. I don't have a 100 MegOhm resistor, so I haven't tried that combination. My assumption is that a .1 μF cap is preferred because of its smaller size.A dime is around 0.7" wide, so I suspect that circuit is going to be too big. I think you have the right idea though.
Are you still aiming for under ¼"?
What size of capacitor would you need to duplicate a timer (I seem to remember you mentioning you had calculated it)?
Not at all. I admire your enthusiasm, and after seeing the N&V article, I am convinced that a timer can be built that will fit inside a 1/4 inch tube, but to put it on a PCB, it will have to be SMD. Maybe Bill can come up with something that doesn't require a PCB.@tracecom - Are you trying to scare me away? It is not working, but making me more determined.
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