To add to that, it matters what you’re hooking into. If you take a look at this thread its a pretty good guide and @Devilclarke 's drawings are spot on for how to hook into a garage door.
You’ll notice it doesn’t do the capacitor here, that’s because most garage doors are momentary switches, and the capacitor just generally acts as a way to hold the button down for a few seconds. If it works with a quick pulse you don’t need to spend the extra 30 cents on parts or time to make it a longer pulse.
If you’re hooking into a solinoid for a desk or door latch, you’ll almost certainly want to do the capacitor since it’s hard to get from the tag reader to the open fast enough otherwise.