A small Arduino controller manages the whole apparatus, advancing the projector and triggering the camera.īecause this was a hobby project, and not a core part of our jobs, it evolved very gradually over the fall of 2017. The camera, with a macro lens, focuses on the slide sitting inside the projector. The lens is removed, and the illumination bulb is replaced with a lower output (and much cooler) LED. The basic theory of operation is to leverage the automated loading and advancing capibilities of the projector, and not much else. Inspired by some commercial products and a hacker spirit, we decided to build our own automated slide capture unit, using a classic Kodak Ektagraphic carousel projector, combined with a Canon 5D Mark III digital camera. With hundreds of thousands more slides in the “someday” pile, one-at-a-time meant a lot of slides would probably never get scanned.
These produce a quality image, but are slow and require an operator to load each slide. Each of these slides was scanned one at a time, on a scanner like the Nikon CoolScan. Hundreds of thousands of slides have been scanned and cataloged, creating a unique collection of material from around the world and across the decades. Since 2006, the Digital Content Library within the College of Liberal Arts has been scanning slides collected by our faculty as part of their research and instruction. For decades, University lectures and research work relied heavily on slides, created from photographs taken on reversal film or charts and diagrams transferred to slides for presentations.
#Batchcrop crack crack
Chances are pretty good that if you crack open a dusty storage closest at any large University, you’ll find an old slide projector, or an unlabeled box of 35mm slides.
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