Bobby Petersen's Push Button "Door Knocker"

Bobby Petersen's Push Button "Door Knocker"

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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 it...it'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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