So I'm a bit confused about just how perception works to find traps.
Here's a few examples to illustrate my confusion;
The PCs enter a room and all roll perception checks just to search the room. Maybe they find some coins, etc. Assuming they get a high enough roll, would they find a trap with this kind of check, or would they have to do a separate Perception check to "find traps?" My confusion with this point comes from skills like survival which actually have a different use and you have to specify what use you are going to roll. Does perception just notice anything at all that is within the roll or are there also different uses?
The same for secret doors, do they pop all out of the same perception check?
Do they have to be within a certain proximity? Does the trap have to be within a certain range for them to find it?