Taking out the plano-convex lens reduces the light and the heat that reaches the camera considerably. The Pi Camera should be able to handle the bright light on its chip, but heat is not very good for sensitive components. The 24 volt, 150 watt Tungsten light bulb is insanely bright, and it produces a lot of heat. I took out the projector lens by just unscrewing the cylinder until it came out. Between those two is a heat filter, a glass square that blocks the infrared radiation of the lamp.Īfter the convex lens comes the frame that holds the slides and the projector lens. From back to front there are a concave mirror, a halogen lamp and two condensor lenses that focus the light and spread it out evenly. Slide projectors have a pretty, shiny set of optical elements. Older projectors look even nicer, but they don't work with the universal trays. slide mechanism not incorporated in the case Īs a bonus its case is a cool-looking sturdy metal, and the slide mechanism works consists of sturdy metal push bars instead of loose plastic parts.push button or remote control (so it needs a mechanism to automatically change slides).150 dollars on eBay, but I bought it for 17 euros in the thrift shop. So I bought a new one, Voigtländer Spezial PM 35 A. After I started the build, I found out that my projector had some impractical features. Neutral Density (ND) gel sheet (buy it at Amazon or your local camera store)Ī little soldering may be required, a multimeter will come in handy and you may want to order one or two 3D printed parts.Wire, breadboard, duct tape and/or a rubber band.TIP120-transistor and a 1 kilo-ohm resistor (both are dirt cheap).
Raspberry Pi with SD memory card and power supply.Here's all you need to build your own automatic slide scanner: I didn't publish the Instructable because I wanted to improve the scanner first, but I finally realized perfection should not get in the way of progress :-) Note: this was a project I built and wrote about a couple of years ago. It's fast, cool, massively useful and you'll reclaim all that space in the attic. So why not hack an old slide projector and use a Raspberry Pi to turn it into a super-fast slide scanner? The Pi can switch slides automatically and store the images online in one go. There are companies of course that offer to digitalise all those boxes for you, but their services are far from cheap. One of my family members calculated it would take him at least 50 hours of mindnumbing labour to process the collection of 2.000 slides his father-in-law left him. That's mainly because you need to manually put in the slides and scan them, one by one. To remedy that, people buy a slide scanner, only to find out that scanning a big collection is a *lot* of work.
How to diy convert slides to digital full#
Boxes full of 35 mm slides are still taking up space. There was no internet, people didn't know any better.Īlthough we now have Facebook and Instagram to share family photos (I'll leave it for you to decide if that is an improvement), the remnants of the Kodachrome era are still in a lot of people's attics. From the 1950s through to the 1970s, boring friends and family with slides of vacations or weddings was an accepted pastime. Before digital photography entered our lives and became ubiquitous, people had their photos printed on paper, and they made slide shows.
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