This project started around a VuPoint Slide Scanner that was no longer compatible. I tore the guts out of the device save for the USB cord and backlight, and replaced it with a RPi0 and V2.0 camera. The software RPi Cam Control made it very easy to make a scanner easily accessible via a web browser.

I decided to make a case for a 2nd unit using the same design, adding a way to include a backlight and replicating an indicator light and button of the VuPoint. I made sure the design used the same slide and negative tray size (so that the slide and negative trays here will also work with a VuPoint that uses a 65mm tray).

Hardware BOM:
RaspberryPi ZeroW
Momentary Contact Switch (7mm diameter mount)
LED (5mm)
x2 Segments of 5mm 12v strip LEDs
3-5VDC to 12VDC Step Up Converter
6cmx6cm diffusion fabric

Design goal: keep the base less than 100mm.

Folgertech i2020

No

No

.25mm

50

Build Notes:

The focal length will need to be changed, which is easy on the v2.0 RPi cameras, and a huge pain on the v1.3 RPi camera.

Software is the RPi Cam Control per https://elinux.org/RPi-Cam-Web-Interface

This package has way more than needed, and many thanks to those that produced it.

Some settings need to be tweaked, I have:
Annotation = ""
Sensor Region=15000,11000, 35000,35000
Image quality: 100

Turn off camera LED, add shutdown button and activity light add to /boot/config.txt:
dtparam=act_led_gpio=21
dtoverlay=gpio-shutdown,gpio_pin=20,active_low=1,debounce=1500
disable_camera_led=1