Icon credit: http://thenounproject.com/term/key/655/  

Icon credit: http://thenounproject.com/term/key/655/

 

KnoKey

With KnoKey you will never again forget whether you locked the door or not — or rather, when you do, KnoKey remembers it for you. No smartphone, no battery, no blinking lights, all KnoKey asks from you is an extra half a turn at the beginning of each locking and unlocking.

An add-on piece to existing keys might be a good alternative for easier distribution and / or market fit testing. 

 

September 2013.

CC0
To the extent possible under law, Yinan Qiu has waived all copyright and related or neighboring rights to this work. This work is published from: United States.