Interesting idea. Wouldn't you have to use a magnet rather than a steel slug? Also, you could have a retractable switch that stands out a few inches beyond the front of the ram, and when that is depressed (prior to the actual ram hitting the door) the current switches on.
You know - you need AC to move the magnet back and forth. But perhaps just going from zero to full voltage would be the first half of the swing. Thoughts from the more knowlegable?
You know - you need AC to move the magnet back and forth. But perhaps just going from zero to full voltage would be the first half of the swing. Thoughts from the more knowlegable?