Help with circuit design?

i want to design a control circuit with the given functionality: 1) press the push button and control circuit (the image attached) will power up and give a countdown (approx. 8-10s) 2) once countdown is done trigger a control current of a separate circuit 3) turn the control (the image attached)... show more i want to design a control circuit with the given functionality:

1) press the push button and control circuit (the image attached) will power up and give a countdown (approx. 8-10s)
2) once countdown is done trigger a control current of a separate circuit
3) turn the control (the image attached) off.

http://img215.imageshack.us/img215/1176/58072459.png



parts that needs consideration:
C1 = 47uF to 220uF

latching DPDT relay:
http://www.nteinc.com/relay_web/pdf/R72.pdf

latching push button (still not final, it's too big):
http://www.galco.com/scripts/cgiip.exe/wa/wcat/itemdtl.r?listtype=&pnum=AB6H-A1-R-IDEC

N/O DPST relay:
http://www.nteinc.com/relay_web/pdf/R74.pdf


QUESTIONS:

i'm not really sure with it. i have these 2 unknown component that are lock-off devices -- if current goes through the gates, it OPENS, BUT it has to do it EVEN IF THERE IS NO CURRENT FLOWING THROUGH THE ANODE AND CATHODE YET AND MAINTAIN IT FOR AT LEAST 7-10ms ... though i haven't actually heard of such a device, does it even exists

and i'm trying to discharge C1 so for the next cycle it'll work glitch free, and that discharge should also keep the current going so as to let 5ms pass and completely switch the latching relay.

i wanted to change the N/O DPST relay to a solid state device... (a FET, maybe???), one that is still small. what's the lowest voltage that this control circuit can operate reliably (6-9 V??)

one last thing, the "control" in the diagram would typically supply current to a gate in a thyristor, switching a separate circuit.
Update: @roger: gee i never thought that TIP32 turns on as it DISCHARGES C1, thought C1 takes about a few seconds to charge causes TIP32 to turn on. anyways... i still have to know what are those 2 "diodes".... i don't wanna be reading a whole topic on diodes on wikipedia to figure it out, you see. a specific part number... show more @roger:
gee i never thought that TIP32 turns on as it DISCHARGES C1, thought C1 takes about a few seconds to charge causes TIP32 to turn on.

anyways...
i still have to know what are those 2 "diodes".... i don't wanna be reading a whole topic on diodes on wikipedia to figure it out, you see. a specific part number would help tremendously.
2 answers 2