water can

12-46 --- elektor december 1980 water can This is an outdoor game for two players, both armed with a bottle of water and a ball. At a certain distance from each other they start throwing a ball at each other"s bottles. Every time the bottle falls over some water will run out and so the first to be left with an empty bottle is the loser. A simple, if rather wet game. The author, however, has managed to develop a dry version using elec- tronics. The bottle is now a can contain- ing a few squeaking bits and pieces. When the can is knocked down, instead of water coming out of it, it will squeak. water can The can also contains a switch that closes when the can falls over. This con- sists of a length of wire with a metal weight suspended on it, which consti- tutes one contact. The other contact of the "moving switch" is formed by the inner wall of the can. The diagram shows the weight can com- bination in the top lefthand corner. As soon as the can is knocked down and the weight hits t...