Oh yeah... I used it as a lock in the bathroom.
So I guess it's a locket wrench now.
What to do if your daughter wants a flashing badge for her 8th birthday? A simple circuit ought to do!
I built this for my cats. There is a 120mm computer fan and a motion detector set to run the fan for 5-minutes when the cat enters the box. Kitties shouldn't have to take a #2 without fresh air, should they?