Momentary button setup

2011-Feb-17, Thursday 03:34 pm
chebe: (Default)
More for myself than anyone else, I often have trouble remembering how to set-up my 4-leg momentary buttons, so I'm making this reminder.

The button has four legs, two pairs of two essentially. The pairs have the flat ends facing each other, like brackets; { }. These pairs are connected when the button is not pressed, and current can be measured across them. When the button is pressed it switches (no pun intended) to flow from one of each pair, to its opposite counterpart. So really, only need to use two of the legs (one of each pair).

Breadboard pics )
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