TechWearable
HMD
The HMD consists of a Liquid Image M1 modified to accept a color bullet
mini camera and a sturdier
headband.
Computing System
The meat of the computing system is the Cell Computing P200 CardPC
with 40Megs of RAM and a 3.2G 2.5" HD. The Intelec PCMCIA104 dual-slot
PCMCIA board, Netwave PCMCIA WLAN card, PCMCIA sound/video capture
card and the HandyKey Twiddler chording keyboard.
Prototype 1
Prototype2 (production version)
Power System
The TechWearable uses the Power Trends PT6302 ISR, to drop the 12v
from the dual-pair of Duracell 6v 3.6A DR11 batteries to a usable 5V. Total
max power consumption=1250mA, (1500mA P133). A Basic Stamp and a few support
components manage the battery power from each of the pairs to keep the
voltage clean while hot-swapping batteries, and take care of the Intelec
board, and peripherals during suspend mode. The battery tray from four
battery conditioners were modified to serve as battery mounts, and one
of each pair house the 4011, resistor, 2N3055, and STPS20L15D Schottky
rectifier. The trays are removed from Sima
SPM-7 battery conditioners available from Fry's Electronics for $19/ea,
or if you only need the tray it may be acquired directly from the manufacturer
(Part P/N 51557 for $6.50/ea)
The Next Step
Display-At the time of development, color VGA resolution displays
were not available, and the M1 was the only available option meeting the
cost/time requirements for the TechWearable 1.0. Display manufacturers
such as Displaytech, Planar, and others are rapidly approaching full distribution
capacity of their color SVGA displays such as the Sony
PLM-S700 Glasstron, and the Virtual
Vision eGlass. It's only a matter of time until the price drops.
Input Devices- The addition of alternate keyboards, bar-code
scanners, IrDA adapters, USB, and other peripherals will be necessary as
demand requires.
Software- Current plans for implementing a barcode-based exhibit
ID system are already in place, and the support software, database, and
hardware are currently being assembled. As time progresses, it is planned
to integrate all exhibit monitoring and control systems into a web-based
interface that may be used by both desktop and wearable users. Impending
failure of a component, low level of consumables, and any condition that
passes outside of the normal operating criteria of an exhibit or component
will instantaneously alert maintenance personnel of this. This system will
allow more effective use of maintenance personnel, reducing staffing costs,
and alleviate the need for a constant presence in the exhibit space.
Construction Details (in-progress)
Case
Cables
Power Supply
PC-104
Hard Drive
Battery Mounts
HMD
Application Areas-Information Prosthetic
- Electronics
- Mouser
- Newark Electronics
- Fry's Electronics
- Digi-Key
- Alltronics
- Halted
- Misc. Hardware
Page Maintained by Brian
Rudy
Image courtesy of Georgia Tech