found this thread on AR15.com and the induction board is cheap $19 on Amazonhttps://www.ar15.com/forums/Armory/Annealeez-vs-Giraud-/42-523453/
I have a couple Arduino boards laying around, some prox sensors and this would be perfect. Going to write alg when I get time then code it. Been over a year since I played with Arduinos.
Should be simple: drop a case -> heat it -> release case -> loop