Really and actually for what we are looking at doing a 555 is likely more than adequate. How much uncertainty is permissible to annealing a case neck? The more that goes in the more the cost goes up. I guess if the idea was to put something together keeping it reasonable in cost that a good part of the control could be placed on a single board? Makes sense. How much need is there for digital display of timing functions anyway? A 555 and a pot should work as a minimum just fine.
This is what it will always come back around to:
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We can make this as simple or as complicated as we want to.
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Ron