Keep in mind that in no way is this going to be accurate to traps from the movies or shows. Honestly, part of what makes seeing Ghostbuster builds fun is seeing how people turned random things into something that totally works - and considering that each "franchise" makes a lot of their equipment in-house I'm sure their resident nerd has their own ideas on how to tinker with things.
This is the lump of clay we'll be working from. I got this for free from a friend who didn't know if it was working or not. Short-answer, it wasn't.
So let's get to it. I opened it up and gutted the thing because the battery and such was super heavy, and since this is going to be hanging from my belt I want it to be light but sturdy. The buttons were removed, electrical outlets filled in with silicone, and then they and other features sanded down until I got tired and didn't care anymore.
The first piece that was added was a clip for hanging it from my belt. I don't know what this part originally was, but it fits a carabiner so that works for me. Most of the pieces being used in this are salvaged from junk.
Yup, junk. Living in a rural area you can't always just pop down to the store to get what you need, so you tend to save stuff for a rainy day and become a packrat. But there's use for some of these fuses and knobs I think.
This end is where the APC's power cord, reset, and phone line bits used to be. We'll find use for these holes later.
And the bottom of the APC, which will be the top of the trap. You can see why when I thought this would make for a decent cosplay prop - the door for the battery is huge.
And the compartment inside is big enough to actually contain a ghost! I have no idea where I found this thing, but he became an essential part of the prop. Not really, but he makes people smile when I open it up.