Our market is flooded with cheap and cheerful AC/DC Multi-Tune Musical doorbells. Most of these doorbells are built around customized microcontrollers from China, and usually run on two penlight (1.5V ...

Regular ding-dong doorbells are fun and all, but it can be nice to put something a little more special by your front door. To that end, [Arpan Mondal] built this neat little piano doorbell to make ...