Hey all. Been a while, but I've
(theoretically
) got something.
This project fell by the wayside, but I occasionally come back to it in my mind and mean to eventually get on with it. Here are my latest thoughts
(should I ever have time to follow through on them...
)
A few months back, I got as far as reverse engineering the MobilePro keyboard with an Arduino. This was pretty trivial, and would allow re-use of the keyboard on any device with USB
(the 32u4 chips have great USB HID emulation
).
The Raspberry Pi 2 is now available, and it's quite powerful. It can run Linux, or a stripped-down version of Windows 10. A number of people have used the Pi in low-profile applications by modifying the USB ports, which would be necessary here. It seems like a logical place to start for a new mainboard, and could probably be made to interface directly with the keyboard
(otherwise, there are some very tiny Arduinos that could serve that purpose
). Or, if you wanted x86/x64, there's always the Minnowboard Max.
This isn't the right part
(you'd need to build a 2-cell version, which is very doable with a number of cheap, commercially-available ICs
), but a circuit like this is what's needed to make the battery usable.
As for the screen- well, you certainly could configure a small, cheap FPGA to drive it
(a few people I've seen on Hackaday have done this with similar parallel LCDs
), but the one that's in there is garbage, and should probably be replaced. Rather than being constrained to the shape that's in there, pretty much any cheap touchscreen LCD that will physically fit within the footprint could be used
(plenty of HDMI options out there thanks to the popularity of the Pi
), with a new front LCD bezel easily 3D printed to make it look "right." I've definitely designed and 3D printed more complicated objects, but the ~10" width of the MobilePro 900 means that I'd probably need to prototype it in 2 pieces on my own, and then have the final one done elsewhere
(I can only do up to 8x8x8" on my printer
).
With this approach, there would probably be a good deal of room left over in the bottom part of the case- the PCMCIA slots would have to go. That's likely a good spot for a de-lidded SSD
(the 2.5" form factor that most SSDs ship in is broadly unnecessary, and the cards inside often take up less than half of the drive's footprint
), if one were to go with the Minnowboard.
Thoughts?