If only they had those keyed-backup door locks in Jurassic Park! Apparently Mr. Hammond did, in fact, spare some expense!
I have used many of these hotel cards and did not think anything about what was inside, so it is nice to know how some of them were put together.
When you mentioned washing your hands at the end, is that what you thought was on them? Metallic dust, or something else?
Being someone who, up until a few months ago, traveled quite a bit, I was very interested to see the inside of these locks! Thanks David.
I was really shocked to see so much conformal coat. Environmental protection on doors that face outside would be an obvious reason for it. But I wonder if there any other reasons for so much coating? I was thinking toward security, but that would just slow someone down--not stop them from modifying the board.
Just a curiosity that I thought others might have ideas about.