The belt gizmo is seen on every Ghostbusters belt in both films and the video game and is therefore a standard piece of the uniform equipment. Whilst not essential for clearance, it does help fill your belt out and make it look more technical. The belt gizmo was made from a Sanyo ICC-808D calculator. These are incredibly difficult to come by and are expensive when they crop up. The main board is connected to a smaller daughter board via a black electrical coil. There are a number of people who offer kits to make replicas. Spongeface on www.gbfans.com also now offers replica printed circuit boards and all the correct components to make as accurate a gizmo as there is available. You can chose to use real IV-9 nixie tubes or clear rod to create your gizmo. Here’s a template you can use to make your gizmo http://www.tk2441.co.uk/buster/Jairuswhitley-beltcircuit-gizmo.pdf

In Ghostbusters 2, the belt gizmo got an update (or downgrade depending on how you look at it) The screen used gizmos simply are the gizmo pouch modified into the shape of a gizmo and painted. Most fans opt to make an actual gizmo to place into their gizmo pouch. You can make one of these from foam board or styrene sheet very cheaply, parts won’t cost more than £10. A template for the GB2 gizmo can be found here GB2StuntGizmoVer3MASTERpreview-SMALL.jpg

The belt gizmo pouch is made from a tape measure holster. You can get these from DIY store or from ebay though there are people such as TygerCheex on both the UKGB forum and www.gbfans.com who make accurate replicas of the leather pouch.