dice shaker

dice shaker elektor december 1980 — 12-29 R. Mohunlol 1 Not an ice shaker, but a dice shaker, an ingeniously simple idea. No high tech- nology electronics involved, but then that was hardly the object of the circuits in this issue. What"s it all about? Well, throwing dice, only this time using an electro-mechan- ical design based on the ordinary, old-fashioned dice. The constructional drawing in figure 2 illustrates the principle. The dice are placed on the diaphragm of a small loudspeaker and are shaken by feeding the loudspeaker with a 50 Hz signal derived directly from the secondary Figure 1. In the circuit of the dice shaker, the switch S1 is a double pole pushbutton. A "biased" toggle switch would also be suitable. 2 winding or a small transformer (9 ... 10 V/0.5 A). The basic minimum of components required are a can, a loudspeaker, a transformer and a switch. To be on the safe side, however, it is advisable to include a timer controlled by a random pulse width generator, t...