Do switches need ground pin?

[tactile]

Hi Folks,

This is probably a very stupid question, but I'm wondering if switches need to have a ground pin? The schematic on the uCApps DIN page shows a ground bus. Is this essential (cheaper tact switches seem to come without ground pins)?

[seppoman]

Every switch has (at least) two pins. The "GND pin" is the one where you connect GND to. You can choose one of them freely ;)

[nILS]

...

You can choose one of them freely ;)

It's generally better to use the left one  :D

[tactile]

Thanks (-_-;)

[/tilted/]

I usually use the other one.

I connect one pin to the DIN board, then i connect the other one to GND.