LINEBURG


<< . .

 33
( 36)



. . >>

custom-develop a more sophisticated hardware mounting solution for the specific laptop
you™re using.
As shown in Figure 15-17, the back panel is cut to allow the cord to pass through. Box frames
tend to have stronger back panels than standard picture frames. Use a saw to cut a clean
opening.
You can also consider future frame upgrades. You could cut cooling vents into the top and bot-
tom of the frame to allow fresh air to flow up through the frame using the chimney effect (hot
air rises). An external power switch would be a great addition, too.
Figure 15-17 shows the final product. Remember to plug it in so it boots up to the desktop.
Wait a minute for the screen saver to activate. And then watch the show!
362 Part IV ” Just for Fun




FIGURE 15-17: The digital picture frame.




Shutting Down the Frame
Shutting down the picture frame can be a tricky issue. If the laptop is unplugged, there™s a risk
of file damage. A better alternative is to initiate a shutdown remotely via PC Anywhere or the
Windows shutdown command.
The shutdown command is run from a command prompt. The format varies per operating sys-
tem, of course. On Windows XP, the syntax is
Shutdown -s -m \\computername
where computername is the network name of the digiframe laptop. It also works by entering a
TCP/IP address instead of a computer name.

The shutdown command is available for Windows NT, 2000, and XP. Windows 98 and ME do
not support remote shutdown.
363
Chapter 15 ” Making a Dynamic Wireless Digital Picture Frame


Updating Pictures
At this point, everything should be working, and the frame is sitting on a desk across the room,
or hanging on the wall. The next thing to do is to add and remove pictures to keep this thing
interesting.
Browse the computer in the Network Neighborhood. Open the folder you created earlier
(C:\digipix in this chapter). Add, remove, or change the files in this folder. The screen saver
should automatically pick up the changes.



Extra Credit: Motion Video
Who says your picture frame needs to be frozen in time? Here are some ideas to liven things
up:

Play videos using Windows Media Player. Set the player to loop continuously and set it
for full screen.
Play Macromedia Flash animations using Internet Explorer. Press F11 in to expand the
IE window to full screen mode.
Play back a previously recorded gaming session.
Install an information screen saver to feed headline news, stock quotes, and weather. If
the frame has an Internet connection, the information will automatically update. Stay up
to date with a wall-mounted digital dashboard!

Symantec PC Anywhere can help to manage motion video. Screen functions like full-screen
video work through PC Anywhere, but the frame rate will be very low, and color depth is
reduced. Use PC Anywhere to transfer and start the video or animation.


Everything on the digital frame is, well, digital. Added functionality is accomplished by means
of new components or devices. For example, you could add a USB video capture device and
watch videos on the frame. Or add an external DVD-ROM drive, and watch DVD movies.
This is getting a bit overboard, but the potential is there.
There is a lot of potential in having a computer display mounted on a wall at home or work.
With Wi-Fi, there is no limit to the possibilities.



Summary
This chapter showed you how to make a digital picture frame that can be so much more. By
taking apart a laptop computer and reassembling it inside-out, a hands-off display is created.
Digital pictures are just one way to use this wireless dynamic digital display.
364 Part IV ” Just for Fun


With a digital display on the wall, so many other possibilities are opened up. It™s just a matter
of choosing software that suits the environment. And with such low costs for these types of
older laptops, more than one per household is possible.
We covered a lot of projects in this book. With your new skill at pulling together parts and sys-
tems, many more projects are just around the corner. Here are some ideas to keep you going:

Banish the phone company with wireless voice-over-IP.
Install an MP3 player in your car and upload songs via Wi-Fi.
Share ideas by starting a wireless user group in your community!

Visit the Wi-Fi Toys section of the Extreme Tech Web site at www.wiley.com/comp-
books/extremetech and let us know what you come up with. Who knows? Maybe the next
edition will feature your project.
Now go make some Toys!
Index
.BMP files, 162 DefCon contest, 275
.DIM files, 163 Fox Hunt, 269, 271
.txt extension file, 159 Treasure Hunt, 269, 277
3-D visualization Virtual Real-Space Tour, 269, 280
extras, 161 access point gaming, defined, 269
for mapping, 161 access point hardware, off-the-shelf, 202
access point mode for repeaters, 213
A access point password, 182
AC and DC loads for solar-powered repeater, 209 access point performance, 82
AC power strip, installation of, 225 access point recording, 157
acceptable use policy (AUP), 240 access point regulations. See FCC regulations
access point (AP) access point settings, advanced
802.11b, 272 antenna selector, 189
and MAC address relationship, 212 authentication and SSID broadcast, 190
building, 171, 176 power, 190
compatibility with networking standards, 5 speed( Tx/Basic Rate), 189
defined, 10 access point setup for access point (AP) gaming, 272
detecting, 267 access point testing
D-Link, 212 temperature testing, 198
access point (AP) gaming, 267, 270 water testing, 198
coaxial antenna, 38 access point detecting of, 269
digiframe, 349 access point, discovering, 267, 269
hotspot network creating, 239 access point for wireless repeater, 212
omnidirectional antenna, 86 access point, grounding of, 171
Wi-Fi link testing, 319 access point, locating, 97
locating, 97 access point, router mode, 249
networking hardware, 267 access point, use of
the fox, 271 do-it-yourself (DIY ) access point, 201
troubleshooting, 237 traffic plotting, 201
with detachable antenna, 93, 176 access points (AP), WEP-enabled, 130
with external connector, 93 access points (APs) with different SSIDs, 132
access point (AP) gaming items access points detecting for virtual touring, 280
access point, 267 access points seeking, in war driving, 104
GPS receiver, 268 access points status messages (AP), 131
laptop computer, 267, 277 access points, bridged mode, 249
optional equipment, 268 access points, for war driving
war driving software, 268, 282 configuration, 123
wireless adapter, 267, 276 default configurations, 123
access point (AP) gaming methods design, 123
drive-by detection, 269 access points, in bridge mode, 212
triangulation, 269 adapter design, 106
access point (AP), connecting to Linux box, 249 adapter interfaces, types, 106
access point (AP), gateway mode, 249 adapter types, for war driving
access point and antenna attaching steps integrated wireless devices, 106
attaching of pigtail cable, 81, 92 PCI, 106
configuring access point, 92 PCMCIA, 106
positioning and installing antenna, 97 USB, 106
running of antenna cable, 96 ad-hoc network, for videoconferencing, 337
using Linksys access points, 92 administrative interface, accessing, 182
access point configuration, saving of, 188 advanced settings, for access point configuring, 189
access point configuring, 92, 171, 182, 186, 187 aerial photography, 163
access point cooling, 199 airborne vehicles, for access point (AP)
access point enclosure, for access point (AP) games, 268 detecting, 277
access point games AirNet adapter software
AP-Hunt, 269, 274 features, 291
Capture the Flag, 269, 280 installing, 290
366 Index A“A I




AllowedWebHosts list, 242 antenna gain regulations, 86. See FCC regulations
amplifier usage for antenna building, 81 antenna gain, for long-distance Wi-Fi links, 307
analog video cameras, 328 antenna gain, for Wi-Fi links, 314, 315, 316
antenna aiming. See antenna positioning and aiming antenna gain, in Wi-Fi links
antenna alignment, for long-distance Wi-Fi links, 321 for receive antennas, 316
Antenna and mounting hardware, 171 for transmit antennas, 316
antenna bandwidth, for long-distance Wi-Fi links, 307 antenna gain, maximum permitted, 84
antenna building antenna installation, 89, 96
directional tin can antenna, 59 antenna interference, 212
paperclip antenna, 35 antenna location aspects, of long-distance Wi-Fi links
regulations, 84 Fresnel zone, 308
selecting the right antenna, 81 GPS, using of, 308
antenna cable, 81 line-of-sight considerations, 308
antenna cable building, 3, 16 microwave attenuation, 309
antenna cable building steps spotting scope, use of, 308
cable crimping, 25 antenna location, for access point building, 172
center pin inserting, 24 antenna modeling regulations, 85
connector placing, 26 antenna pattern, for Wi-Fi links, 315
core clipping and crimping, 24 antenna polarization
crimp ring placing, 18 horizontal, 45
crimping the ring, 29 vertical polarization, 45
dielectric stripping, 22 antenna positioning, 97
inspecting finished product, 30 antenna positioning and aiming, 56, 81
jacket removing and stripping, 20 antenna positioning and installation, 91, 97
placing crimp ring, 29 antenna power and direction, 36, 40, 41, 77
shield placing, 22 antenna power and direction, 35
shield trimming, 27 antenna profile, for war driving, 117
shorts checking, 22 antenna radiating elements. See antenna elements
antenna cable inspection, finished, 30 antenna radiation
antenna cables, for solar-powered repeater building, 207 hazards for human body, 87
antenna cabling, for Wi-Fi links radio frequency radiation exposure, 87
antenna connectors, use of, 318 antenna radiation patterns
coaxial cable, use of, 318 directionals, 84
coaxial cable, waterproofing aspects, 318 horizontal plane patterns, 77
electrical tape, use of, 319 omnidirectional, 84
impedance constraints, 318 vertical plane patterns, 77
lightning protectors, 319 antenna radiator, 60
LMR series, 318 antenna reflector, 41, 60, 307
wrapping of connectors, 318 antenna simulation, 77
antenna choosing antenna simulation software
based on site survey, 88 4NEC2, 77
for long-distance Wi-Fi link creating, 303 can antenna simulation, 77
omni versus directional antenna, 83 antenna system
antenna connections, protecting of line loss, 12
use of sealant tape, 233 power loss, 12
water-tight aspects, 232 radiation pattern, 12
antenna connectors regulations, 95 antenna to access point connecting components
antenna coverage, 173 antenna cable, 82
antenna design opposable thumbs, 82
for reception on Wi-Fi channel 6, 49 pigtail cable, 82
round radiating element, 70 antenna tower grounding, 310
wedge radiating element, 73 antenna types
antenna designing regulations, 84 directional, 35
antenna elements omnidirectional, 36
half-wavelength element, 38, 39 antenna types, cross-section of, 115
quarter-wavelength element, 38, 39 antenna types, for Wi-Fi link creating
antenna feed point, 42 coaxial antenna, 307
antenna gain, 36, 40, 85 dipole antenna, 307
antenna gain and coverage relationship, 84 directional antenna, 307
antenna gain measuring dish antenna, 307
defining decibels, isotropic (dBi), 36 isotropic antenna, 307
logarithmic measurement, 36 omnidirectional antenna, 307
367
Index A“C I




antennas mounted to pole top, 232 temperature and water testing, 198
antennas mounting aspects, for solar repeater, 229 testing of all parts, 191
antennas on repeater structure bps. See bits per second
for bridged backhaul, 212 bridge
for wireless clients coonecting, 212 ethernet-to-wireless, for TiVo, 289
anti-virus software installing, for WLAN securing, 184 for Wi-Fi link testing, 319
AP. See access point bridge configuration, for repeater, 212
AP games. See access point games bridge link. See also bridged backhaul, 212
AP-Hunt bridge mode, supporting products, 213
DefCon Wardriving Contest, the, 275, 277 use of bridge, in wireless repeater, 211
defined, 274 Broadband-capable TiVo, 287
GPS mapping software, 276 Broadband network connection, for TiVo, 287
scoring system, 275 browser, 262
SSID broadcasting, 275, 276 byte, 4
war driving techniques, 275
C
AP-Hunt equipment
antenna, 275 cabinet layout, for installing solar system, 221
hardware, 275 cabinet mounting, 229
external antenna, 275 cable connectors
wireless adapter, 275 center pin placing, 15
software, 275 female, 15
vehicle selection, 275 for LMR-400 Cable, 17
AP-Hunt hardware setup, 276 male, 15
attaching an antenna to access point, 81 N-type connector, 15
audio capture, 329 cable continuity tests, 97
AUP. See acceptable use policy cable loss, 13, 314, 316
auth server. See authorization server cable losses, 315
authorization server, 240 cable snugging and pinching, for access point assembling, 193
AuthServiceURL, 251 cable testing
automated online calculator, for link check for continuity, 33
planning, 317 check for shorts, 33
using ohm-meter function, 33
B cables checking, for long-distance Wi-Fi links, 321
backhaul links caching DNS server, 251
downlink, 211 caching DNS, installing, 239
uplink, 211 Cal Free Net, 237
bandwidth, 317 camcorder using IEEE1394, 327
bandwidth, for repeaters, 212 camera selecting, for videoconferencing, 323
battery bank, for solar-powered repeater, 209 cameras, for videoconferencing
battery cell, installing of, 222 analog video cameras, 328
battery pack, for access point (AP) gaming, 272 camcorders, 327
Beacon Interval, 142 ethernet cameras, 328
beam pattern, 45 USB cameras, 326
beam pattern, for antenna, 40 can antenna building
beam tilt, and Wi-Fi links can dimensions, 63
electrical tilting, 310 drilling aspects, 65
mechanical tilting, 310 radiator offset aspects, 65
beam-shaping elements, 60 right can finding, 63
BeggarWare, 128 can antenna building components
Best Signal category, of Treasure Hunt, 277 coaxial cable, 59
Best Time category, of Treasure Hunt, 277 drill, 59
beta software, 128 drill bit, 67
binoculars, for Wi-Fi links, 303, 305 soldering iron, 59
BIOS. See digiframe, basic input/output system type N-Connector, 59
bitmap files, 162 can antenna building, steps for
bits, 4 can measuring, 65
bits per second (bps), 4 cleaning the can, 65
Bluetooth connectivity, 114 drilling of holes, 66
Bluetooth GPS receiver, 114 N-Connector building and mounting, 73
box assembling preparing of N-Connector, 67
case and antenna mounting, 195 preparing the can opening, 64
plastic or metal case, modifying of, 193 weatherizing the antenna, 74
368 Index C“D I




can antenna dimensions coaxial cable connector
antenna radiator, 63 making, 13
diameter, 63 types, 15
length, 63 coaxial cable layers
radiating element, 63 core, 12
can antenna soldering, 73 dielectric, 12
can antenna types jacket, 12
Pringles can antenna, 60 shield, 12
tin can antenna, 60 coaxial cable sizes
waveguide can antenna, 62 for 2.4 GHz, 13
can antenna, 3-D simulation, 77 LMR cable series, 13
can antenns radiator type, 65 Times Microwave, 13
cantenna for access point (AP) gaming, coaxial cable types
171, 269, 270 coax jumper, 12
canvas duffle bag, for access point (AP) gaming, 273 coax pigtail, 12
Captive, 251 coaxial cables
Captive mode, 251 cable loss, 13
captive portal software, 240 length criterion, 13
captive portal system, for access point detecting, 280 coffee can waveguide antenna, 45
Capture the Flag COM. See common object model
access points detecting, 280 COM add-in ability, of Microsoft MapPoint, 148
AP-Hunt and Treasure Hunt, merging of, 280 COM port, 114, 131
defined, 280 common object model (COM), 157
playing of, 280 community, 364
SSID assigning, 280 Compaq Armada M300
car-to-car link options checking for cable runs, 356
trip length, 340 LCD panel removing from laptop, 356
trip terrain, 340 modifying LCD power cables, 358
car-to-car videoconferencing, 323, 338 necesssary coverings of laptop case, removing of, 355
car-to-car videoconferencing components removing obstructions, 356
car mounted Wi-Fi antenna, 323 Compaq Armada M300:, 360
DC-to-AC inverter, 323 computer preparing, for digiframe, 349
external connector, 323 computer selecting, for making digital picture frame, 345
laptop computers, 323 cone radiating element, 68, 69
mounting system, 323 configured access point testing aspects adapter and cable connection
video for windows (VFW) compatible video testing, 193
source, 323 configured access point testing aspects hardware
videoconferencing software, 323 testing, 191
Wi-Fi card, 323 connector loss, 315
car-to-car wireless video link, 323 connector losses, 315
case grounding, 201 connector placing, for building antenna cable, 26
case mounting steps, for access point assembling, 195 connector types for Wi-Fi cards
center pin and connector placing, for building antenna cable, 27 MC-Card, 31
channel 6, 49. See Wi-Fi channel 6 MCX, 31
channel sawing and cutting, for access point MMCX, 31
assembling, 194 RP-TNC, 31
channel separation, 9, 211 connectors waterproofing, 197
channel setting, for access point configuring, 187 core clipping, for building antenna cable, 24
channel, for videoconferencing, 337 core crimping, for building antenna cable, 25
Channels mode filters, 138 crimp ring placing, for building antenna cable, 29
Channels mode, of NetStumbler, 137, 138 crimp tool, 3
channels selecting, for wireless repeaters, 211 crossover cable, 249
channels, for access point operation, 185 CTF. See Capture the Flag
charge controller, 209 CU-SeeMe videoconferencing software, 330, 331
charge controller, installing of, 223 custom logo making steps, in MapPoint, 163
CIF, videoconferencing standard, 326 custom symbols, for representing hotspots, 162
Class C networks, 247 cycles per second. See hertz
client adapter, 5, 10
D
client computer, for hotspot creating, 240
coax. See coaxial cables data converters, for mapping purpose, 146
coax cables crimping, 25 data manipulation tools, 153, 160
coaxial antenna for long-distance Wi-Fi links, 38, 307 Data Mapping Wizard, 156
369
Index D“D I




data signaling, 10 laptop configuring to wireless network, 349
data visualization, 166 network adapter installing, 349
datums, 151 picture display software installing, 349, 352
daytime war drive, view of, 104 remote control program installing, 349, 353
dBm, defined, 14 screen saver slideshow installing, 352
DC-to-AC inverter, for access point (AP) games, 268 shared digipix folder setting up, 349, 350
DC-to-AC inverter, for solar repeater configuring, 224 Wi-Fi card installing, 349
DC-to-AC inverter, for videoconferencing, 342 windows setting up, 349, 353
DC-to-AC inverter, installing of, 224 digiframe, file sharing service, 350
DC-to-AC, for videoconferencing, 323 digiframe, folder sharing steps, 351
decibel (dB). See also line loss digiframe, power saver settings, 354
expressing as dBm, 14 digiframe, Windows setting steps, 354
related to 1 milliwatts (mW), 14 digipix folder, 349
decibel measuring digipix folder setting up, 351
dBm defined, 14 digital frame, 346
relationship between mW and dBm, 14 digital frame, added functionality, 363
decibels, 84 digital media option, for TiVo. See also Home Media Option
decibels, isotropic (dBi), 36 digital picture frame
Decimal Degrees format, 142 defined, 345, 346
Dedicated GPS receivers, for connecting laptop, 113 for picture storing, 346
default gateway, 247 digital picture frame building, 345
default gateway addresses, 247 digital picture frames, 347
default gateway, setting, 247 digital subscriber line (DSL), 239, 244
DefCon Wardriving Contest, the, 275, 277 digital video recorders (DVR). See also TiVo
DeLorme compatible files, 159 diople antenna for long-distance Wi-Fi links, 307
DeLorme format, 149 dipole antenna, 37
DeLorme Image Files, 163 directional antenna
DeLorme Street Atlas, 145, 149 for long-distance Wi-Fi links, 307
DeLorme Street Atlas USA, 160 for Wi-Fi link testing, 319
DeLorme Street Atlas USA using WiMap, 159 panel antenna, 42
DeLorme TopoUSA, 161 parabolic antenna, 42
desktop computer, for digiframe, 351, 352, 353 sector antenna, 83
detachable antenna, 82, 176 waveguide antenna, 44
detachable antennas, 93 Yagi antenna, 41
Device menu, NetStumbler, 134 directional antenna transmission, 83
device name setting, for access point configuring, 187 directional antenna, advantages, 83
dgipix Folder, 350 directional antenna, defined, 35, 40
DHCP, 247, 248. See Dynamic Host Configuration directional antenna, radiation pattern, 84
Protocol directional antennas for access point (AP) gaming, 270

<< . .

 33
( 36)



. . >>

Copyright Design by: Sunlight webdesign