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Electronic Book Combination Lock
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1843 (6 in 7 days)
Unique downloads:
442 (4 in 7 days)
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I'm sure you have all heard of the trick in movies, where someone goes into a hidden room , which can only be opened by pulling out the correct book from a bookshelf.
I decided to change this movie cliche a bit. I took a sharp IR sensor and mounted on a bookshelf. It measured the distance to any book that was pulled out, and checked to see if that was the "key" book. After getting it to work with one book pulled out. I made it a combination of books. It has to be 7-9-5 in that order, any other books are ignored. It resets after 15 seconds. Details on my blog. ( http://erobots.blogspot.com )
Right now the code to activate a buzzer.
Pull book 7 out
push 7 in
pull 9 out
push 9 in
pull out 5
KEY SOLVED- buzzer rings
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| infrared, IR, electronic, electronic book lock, electronic combination, secret bookcase, book lock, book combination, airman00, secret lock, electronic secret lock, combination lock, bookcase lock, bookshelf lock, secret lock, secret book, book key |
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