digibell

Like the `Big Ben 95` circuit published in Elektor 2 this is a design for an electronic doorbell that plays the well-known `Westminster Chime`. Unlike the Big Ben circuit, where each note had to be tuned individually, the programming of the Digibell is carried out digitally. Therefore all the notes are automatically in tune with each other, this means the only tuning necessary is a single adjustment to set the entire melody in the required key.