doorbell drone

There seems to be no end to the variety of different sounding door-bel Is which people are prepared to de-sign. Everything from the Hallelujah Chorus to the chimes of Big Ben have been simulated for the entertainment of visiting door-to-door salesmen. However, the imaginative resources of our readers would appear to be inexhaustible. The circuit presented here produces a sound which is somewhat akin so that of bagpipes, and while not exactly signalling the death knell of original bagpipes, should prove popular north of the border.