Wearable Computer

NURDspace Project
Participants	User:buzz
Skills
Status
Niche
Purpose
Tool
Location
Cost
Tool category

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I want to build a wearable computer around a Raspberry Pi and this 1cm wide CRT i salvaged from a camcorder.

Pics

• 

  setup test

• 

  first tests of the screen

• 

  beta1 of the keyboard

• 

  beta2b of the case

moar pics

Case

• Needs notching/interlocking connection from system to batterypack
• Resuted in http://www.thingiverse.com/thing:26195

• Different 'units'
• Raspberry + power unit is one unit, this has a display on one end, and only the needed connectors of the raspberry pi exposed.
• Battery will connect to the main unit with the thingy linked above.
• Possibility to hook up a second battery without disconnecting the first.
• Possibility to connect two batteries together to make a bigger battery???

Battery system

• http://datasheets.maxim-ic.com/en/ds/DS2438.pdf for gauging and voltage monitoring
• http://www.ebay.nl/itm/1-PCM-Protection-Circuit-Module-For-11-1V-3S-Li-ion-Li-Polymer-Battery-pack-HX-/220967028845?pt=LH_DefaultDomain_0&hash=item3372a9486d#ht_1450wt_809 for protection of the unprotected cells

• will connect to the main unit with a 3 pin connector (+v, 1-wire data, gnd)
• there will be two 3 pin connectors to swap batteries while staying online (or maybe just run on two batteries)
• on the Raspberry Pi there will be a attiny (or something) on uart0 to interface with the 1-wire
• main unit will get an internal 2a 5v regulator (with display woohoo)

• http://www.societyofrobots.com/member_tutorials/book/export/html/101

Screen

• crt will be mounted on cap
• beamsplitter will be mounted under the cap, reflecting visual into eye
• lenses will be needed between beamsplitter and crt for focus
• beamsplitter will be mounted on a swivel, and rotatable for higher flexibility
• another 3 pin connection : +5v, composite, gnd

Input

• a chording keyboard
  • http://www.thingiverse.com/thing:10541
  • http://chorder.cs.vassar.edu/spiffchorder/forside
  • http://pjrc.com/teensy/usb_keyboard.html
  • https://github.com/robnormal/teensy-chorded-keyboard , omg , almost ready to use, change code to modified nasa from spiffchorder
  • http://etc.servehttp.com/spiffchorder.pdf - 5 pages with all the chords in modified nasa

• keyboard nearly finished...
• add a mouse? maybe a trackpad on top of the wrist, or a mini joystick on the thumbpad?

Have

• Raspberry Pi
• mini CRT (second found, first seems dead now :s )
• teensy (for usb keyboard emulation)
• wrist frame (soon on thingiverse)
• Beamsplitter (ordered)

(on the way)

• good power source
  • needs a proper bms! gauging and maybe built-in charging?
  • just needs 5V! but a lot of amps ...

Want

• magnifying lenses
• better case
• some wireless card(s) on usb ?