I want to hook up a push button on my photobooth following this guide.
I already have a serial cable and a port on my machine. The button I will be using is this one here.
It is an illuminated button so I would like to get power ran into it. What I am looking at using is this here.
Possibly combined with this, so that I can keep the power supply intact.
My understanding is that that piece is just wrapped around one of these.
So, what my question is, how do I know which is power and which is the ground. I want to be careful about connecting any of this to no break anything, so I thought I would check. I know that you might not be able to answer this just by looking at the parts and I don't really expect an exact answer either. I just want to know how to find out what is what when I get the parts in. If I can get one better than that I'll take that too!