button_keypad
From Valve Developer Community
button_keypad is a prefab located in the Prefabs HL2 folder, containing a keypad setup.
This prefab is comprised of two entities
- A prop_dynamic using the
models/props_lab/keypad.mdlmodel. - A func_button.
When pressed, the func_button is configured to make a specific sound and make the model briefly display "*ERROR*" message on the readout portion of skin.
Tip:By changing the sound of the func_button, adjusting the skin property to be switched to "1" instead of "2", and adding an output to another entity, you can easily have the keypad grant access to something instead.