Knock-operated door unlocker keeps you on the DL
Ripping a page straight from James Bond, enterprising hacker sprite_tm built this knock-activated door unlocker to help out a friend who wanted to keep his access to a room in his apartment building a secret. The system listens for a particular pattern of knocks speakeasy style and triggers a decidedly low-tech unlock mechanism when you enter the right knock-code -- it winds a rubber band around the lock handle. We're not certain if we buy the backstory here (what happens when the landlord sees a giant motor gaffer-taped to the inside of the door?) but the idea is pretty sweet, and we're even thinking of a mod to make the door scream "TWO BIIIIIIIITS" when we knock "Shave and a Haircut".
[Via Hack A Day]
[Via Hack A Day]



















and nobody would be able to hear, remember and duplicate that knock?
sheesh... keypad entry would be safer...
If you read the page, he says the landlord can't be able to see any tampering from the outside... so keypad is out of the question.
Someone could duplicate it, yeah, but I don't think his intention was to create a highly secure door lock.
Pblblblblblbleeeeeze, Eddie!
How long before this is avaliable on TV for the low low price of $19.95?
Why not make a bluetooth door unlocker? Then it'd be 100% safe.
(sarcasm)
With a peep hole in the door and the right group of friends you could have a knocker-operated door unlocker.
Perhaps more fun as well, under the proper circumstances.
OR
you could rig a camera to the peep hole with some face recognizing software that would trigger the unlocker...
Have you ever seen face off?
No toon can resist...
Except maybe this one: Knocking on doors gives him a headache:
http://www.engadget.com/gallery/winners-of-the-engadget-mascot-contest/273394/
umm.. And this dude wasnt growing pot, storing stolen goods or abducting people? Why else would he need the old... "Its not my place" "I am just visiting a friend.. see I dont even have a key! "
I prefer my painting that talks back to me Harry Potter style.
Lemon Drops...open up please.
this is exactly what they make plug pullers for - pick the lock, pull the plug, measure the pins, cut a key. What happens when the landlord busts in on your terrorist looking bomb device?
just make yourself a key...
Try and open that door when you're drunk..
why he need to be so ghetto? you can just buy this lock- same idea, professional implementation.
works with a car-remote like keypad device, that you press the correct code and put against the door and it emits a super fast knock that opens the door.
http://www.knocknlock.com/