- 1x Raspberry Pi 2 (For control with Spreads)
- 1x Raspberry Pi 2 Case
- 1x 7-Port Powered USB Hub
- 2x USB Mini B Cable
- 1x USB Micro Cable
- 2x Canon Powershot A2500 Camera
- 2x AC Adapter For Camera
- 1x SD Card Reader (For writing/updating SD Card Imags and for Kiosk Mode)
- 2x 4GB SD Card (CHDK Images for Cameras)
- 1x 16GB Micro SD Card (Spreads Image for the Pi)
- 1x Power Strip (Surge protection, acts as a single power switch for everything)
- 1x Small Mirror (For camera callibration)
I've been working on a Spreads image for use with this standard pack. Unlike the nightly builds, it is based on Raspbian with a standard pi user. My Spreads image can be used as a network appliance just like the nightly build. But you can also plug a keyboard/mouse/monitor into the Pi and use it as a standalone kiosk instead. In either mode, you will be able to copy books off onto SD cards using the card reader.
This version of Spreads has been tested with a pair of CHDK images for the cameras. These images are already bootable and configured. The 'odd' image is for the camera that will point at the odd numbered pages and the 'even' image is for the camera that will point at the even numbered pages. For the CHDK images, unlock the SD card, write the image, then lock the SD card.
If you pick the hardware described here for your new scanner, then you should encounter fewer problems getting started. And when you do encounter a problem, I will likely be able to reproduce it because I have the same hardware. As others make scanners with this standard hardware, they should be able to be more helpful as well.
Regardless, more documentation is on its way. I will be documenting the quirks and potential pitfalls in this hardware setup. And I will also document more about how to use the mirror technique to calibrate your camera (see the Footsie Bookscanner thread for more discussion on this).