A regular digital camera is easy to use to improve home security. Simply photograph all thievable items, along with close ups of any serial numbers or identifying marks. Including a ruler in the picture can sometimes be useful.
Upload the pics to an online storage site, and if items are ever stolen the pictures can help the police identify and return your items.
You can also put up a sign or 2 stating that all items are security marked & securely catalogued offsite.
Inspection cameras (endoscopes) are now available fairly affordably.
Take pics of your project and show us. The wiki can always do with walkthroughs of various jobs.