Chickens? Yeah, they're something I've been working on for a while now...Originally Posted by knutb
But seriously, here's a link to one. It's the first link returned by the search, I know nothing of the manufacturers product specifically:
Automtic Egg Turner
For what it's worth, do NOT use these for your incubating eggs, the mortality rate will be astronomical. Can't say if the same would be true for your negatives.