Hello, people!
As I am photographer, so I collect enormous number of Kodacrome,Fujichrome,..dias. Chemistry. Light and silver. Analog photography. 36 pictures. Waiting for developing. Yeah.
Hey, when it was that? Imagine a dia after 40 years?
Nowadays, newcomers don't know what was that. Instant picture. Instant everything. Smile.

Step 1: 1000 Words

Well. I liked to preserve old chemical captured light. And I assemble "dia scanner".

1. The best light is for dias to copy - point it on sky at sunny day. About 5600K.

2. Few thousand dias... loaded, pointed on sky... and it is not everyday sunny.

3. I needed artificial light ... but halogen is to warm.

4. LED's! I select few with 6000K and few with 4500K

5. Battery 4,5V.

Step 2: Tube 1

Already purchased duplicator. Plenty of them on market. Have a +10mm lens and screw according to your filter thread on back. This can be used as strong nacro lens.

Step 3: Tube 2

Front side. A gap for inserts diapositives. Front of 2mm polycarbonate "Plexiglas"- (Lexan*R is a Trade mark name- usually used in conversation for polycarbonate products... ).This front can be replaced according needs and taste. LED array is directed from a reasonable distance on this white surface to cover a 40x30mm square with "equal" luminosity... I use the LED wirh 15mm angle...concentrated light.

Step 4: Circuit

You can see a potentiometer, 47 Ohm and a car lamp 5W 12V as a resistor. I can choose amount of light to get proper exposure through diapositives ...to my small camera.

Step 5: Switch On

It is diffuse light, proper Kelvins and intensity...falling on white Lexan on dia copy tube....

Step 6: Better Look

Here you can see how jig is made. (Camera and tube for dia copy are bought. Not made)
I use a Lexan Plexiglas to built this jig-holder to help me in a boring work of dia copy.
Comfortable body position. Both hands are free. Insert. Adjust. Click. An so on....

Step 7: Ready

So. now it's time to insert diapositive and make a click...

Comfortable from the chair. Or bed. Or....
At any time. Night . Evening?
(Do not forget a beer not far away from hand.:))

Sincerely yours.
Kresimir