Metal Ball Switch

This switch will close an electric circuit when it is tipped in any direction. It can be used alone for booby traps or in combination with another switch or timer as an anti-disturbance switch.


diameter {see Note) Solid coppcr wire 1/16" (1/4 cm)

diameter Wood block 1M ( 2 1/2 cm) square by 1/4M thick Hand drill Connecting wires Soldering iron &t solder

NOTE: If other than a 1/2" diameter ball is used, other dimensions must be changed so that the ball will rest in the center hole of the block without touching either of the wires.

6. Wrap adhesive tape around the edges of the plate and wood base. This will assure that no dirt or other foreign matter will get between the plates and prevent the switch from operating.

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