This is probably a stupid question and one that has a simple answer.
I am in the process of tarting up my old Kickstarter picade.
I have purchased some LED illuminated buttons.
They have four prongs on them:
- Two for the LED; the 5V and its ground.
- Two for the input to the board and its ground.
I have daisy-chained the illuminated bits OK and everything works as expected, i.e. the lights go on when the Pi is powered.
My question is, the other two prongs, the connection to the controller board and its respective ground.
How do I tell which is which, or does it not matter?
Can I just wire one prong to the Picade board and the other to ground, or is there a definitive way of doing it?