This Electronic Mail Box circuit generates music intimating the arrival of mail. The circuit uses a high bright White LED and an LDR to detect the arrival of mail in the box. IC NE 555 is designed as ...

For the Ottawa Mini-Maker Faire this year, [Steven Dufresne] created an electronic take on the classic mechanical music box. A typical music box uses a sequence of bumps on a rotating drum to pluck… ...

The music box itself — called the XOXX Composer — is comprised of eight wheels, each with 16 positions that hold small magnetic balls. These balls can be moved around, and whenever they pass a ...