The ‘Knock Knock Ding Dong Door Bell’ is an innovative switch that activates your home doorbell when someone comes-a-knocking. The current prototype is a working proof of concept that utilises an Arduino with wave shield to play the bell sounds and a piezo as a vibration sensor to detect knocks.
Future versions of the Knock Knock Ding Dong Door Bell will text you when someone knocks on your door and you are not home.
Knock Knock Ding Dong Door Bell. Coming this Spring. US$95.00