You enter a study and see a lightbulb hanging on the bookshelf. You try all the switches in the room — nothing is turning it on. Remembering you’re in [lonesoulsurfer]’s home, you realize that you’re going to have to start yanking on every book in sight.
While often associated with the likes of Bat-caves and other complicated hidden passageways, turning a shelved book into a secret switch isn’t complex in its own right. [lonesoulsurfer] is basing their build on one by B.Light Design revolving around a fan switch, some aluminium strips, a block terminal, fishing line, a hinge, and — of course — a book with a dust jacket and something to trigger.
Bend the aluminium into an angle bracket and drill a hole to attach the fan switch — ensuring the whole is small enough to fit behind and not distinguish the book you’re using. Cutting the hinge to the size of the book and screwing a strip of aluminium to it, both this lever and the fan switch’s bracket are then mounted on the shelf. Once a length of fishing twine is tethered to the lever and fitted through the book’s pages to the fan switch — ensuring the line is taut — sliding the dust jacket back onto the book completes the disguised switch!
[lonesoulsurfer] is using this switch to trigger a battery powered light as messing with mains power is a whole other beast. Since the fan switch has enough spring to pull the book back into place, all that’s left is to befuddle and impress your friends next time they come ’round.
Don’t like this method? Here’s a slightly different rendition, as well as a version inspired by Batman.
9 thoughts on “Secret Book Light Switch”
or just use a reed switch, with a small magnet glued into an edge of a book cover…
I was going to suggest using the NO contacts of a commercial Microswitch. It would probably handle switching mains current better as (if properly specced) they are designed for mains switching.
Better would be to not switch the mains directly at all. Switch the contractor control to a relay that switches the mains. Else you night electrocute yourself.
I saw AA batteries in the video, it’s just a fun, decorative LED affair!
Reed switch opens up even more options: move the book in a certain morse code pattern to activate the switch etc.
Without knowing the pattern it wouldn’t be possible to repeat the action :-)
Will have to use a book on Maxwell :D
Tilt switch or Mercury switch in book with wires out. Magnet in spine reed switch under shelf. Might be good for reference books, alarm if not put back soon.
I for one am a fan of the secret clearly visible wires in the back.
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