Little clicky switches are standard input “buttons” on electronic projects. These work best in a PCB but can be used on a solderless breadboard as shown in this tutorial. The pins are normally open (disconnected) and when the button is pressed they are momentarily closed.

They come in a pack of 20, they’re pretty handy so you’ll want to keep them around.

You can find an EAGLE cad package for these in switch-omron:B3F-10XX

Technical details

Downloads:

Example 6mm tactile switch datasheet for dimension information

Tutorials:

Tactile button tutorial

Product Dimensions: 6.0mm x 6.0mm x 5.0mm / 0.2″ x 0.2″ x 0.2″