Well after a series of setbacks, fried HDs, dead laptops etc. None connected with this issue, i returned to the problem at hand.
Regarding the timing i have a system working now using Opto Isolators
I am using
A is 470 Ohm
B is 1K8 Ohm
C is 1K8 Ohm
This seems to be running really well, very solid, but my numbers are somewhat arbitrary, how do i figure out what the best resistors will be? I've been trying to keep the numbers up to reduce current. But i just dont know.
OK now onto the Transformers
I'm not at all sure how to attach them across the rails without short circuiting things?
Plus its DC, so i'm not sure what to do in that respect, i think in fact instead of being proper DC its a half wave thing which might mean we have effectively AC to transform, but i'm not sure.
I've torn apart an old dead VCR for coils so hopefully i have something to work with.
All advice gratefully received.