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Doorbell/Arduino/Altoids | by Roo Reynolds
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Doorbell/Arduino/Altoids

The three wires from the doorbell circuit are soldered to some pins which plug into the Arduino (barely visible here).

 

You can see the circuit more clearly here.

The hole for the USB lead is a bit of a mess. I used a drill and some wire cutters. I think I could do with a Dremel or something.

 

rooreynolds.com/2008/05/18/doorbell-update/

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Taken on May 18, 2008