The smart phone has become the mother of all electronic devices for one very simple reason: You always have it with you. And that's why a phone is a great place to put all the stuff related to your door. For example, you can virtualize the key, the peephole, the doorbell and other elements of the door, and put everything on your phone to be used from anywhere over the Internet.



There are major advantages for doing this (besides laziness). For example, you can send a key via email to unlock your door. You can hear knocks on the door or the ringing of the doorbell even when you're not at home. And you can see who's there even when you're not.



Three new products take electronic door stuff to the next level. All of them are crowd-funded projects still in development. But if everything goes according to plan, you'll be able to buy all of them, and at an affordable cost, by summer 2013.