Bobby Petersen's Push Button "Door Knocker"

Bobby Petersen's Push Button "Door Knocker"

Gregory Han
Apr 23, 2012

There's no mistaking when someone is at our front door. Our 1900's era apartment still offers a mechanical metal-on-metal doorbell which still scares the wits out of us each time someone rings's that loud. How I wish we had this sort of subtle device installed instead.

Petersen's device is a unique prototype, so if you're looking for retail alternatives, here are a few to consider:

Via notcot

(Images/Video: Bobby Petersen)

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