How-To: Ball-in-Cage Switch: 
A ball-in-cage switch is a mechanical alarm switch that works on an ingenious principle. It has a single relatively unstable “open” position, in which a metal ball rests in a small divot in an insulating base, inside a cage made from two U-shaped metal staples that overlap one another without [...]
Read the full article on MAKE
A ball-in-cage switch is a mechanical alarm switch that works on an ingenious principle. It has a single relatively unstable “open” position, in which a metal ball rests in a small divot in an insulating base, inside a cage made from two U-shaped metal staples that overlap one another without [...]Read the full article on MAKE
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