"April" <noreply@mail.com> hath wroth:
>I would like to setup a web cam just to use on MSN Messenger and so that
>when I talk to friends, they can see me. I would like to simply be able to
>just clip it to my laptop or monitor, just something small will be fine.
Ok, so it has to be:
1. Wireless
2. Self powered.
3. Portable.
4. MSN Messenger compatible.
5. Small enough to clip onto a laptop screen.
>Currently I use a Bluetooth headset to talk on MSN and just wanted the
>equivalent in a web cam. I wanted wireless or bluetooth only because I do
>not want any more wires on my desk, and bluetooth is portable and flexible
>as you can put it or move it around the desk with ease.
Well, there are limitations to what can be done with Bluegoof. The
basic problem is that BT 1.1 runs at about 350Mbits/sec maximum. BT
2.0 will go to twice that on a good day. The result is very slow file
transfers which will also make BT unsuitable for live video.
There are several cameras on the market that have BT built in, but are
NOT able to produce live pictures such as required by a IM camera. For
example, this nightmare of a digital camera:
<http://pcworld.about.com/magazine/2203p072id114494.htm>
takes 15 minutes to move 7MBytes of JPG's via BT. That's about one
frame per minute. For live video, you would need at least one or two
frames per second. Bottom line on a BT live camera is that the speed
is lacking.
Wi-Fi has the speed, and will easily do live video. Finding something
that fits all the aformentioned requirements will be difficult. The
first 4 requirements are easy. The size requirement is pure hell. Are
you sure you need to have it small enough to clip onto a laptop
screen?
>It seems difficult to find something like this online. The only things I
>find alot of are USB web cams eg. Logitech
Actually, the trend is to build the camera into the laptop. I have a
Sony Picturebook that does that. Some Acer laptops have a built in
camera. I don't have time to search right now, but you might want to
start here:
<http://www.networkcamerareviews.com/networkcameras/>
and select "wireless" in the guide. Check what powers the wireless IP
camera and build a battery pack. It's not small and will not clip
onto the laptop, but it will fit on the monitor or desktop without
wires. I'll do some more searching after I'm done playing with the
toys I bought yesterday.
Incidentally, I recently had a similar application. The customer
wanted a wireless camera that would take continuous photos of his
face. It was to be clipped onto the bill of a baseball cap, pointed
at his face, and take continuous videos while he underwent a stress
test. The biggest headache was finding optics that would have the
necessary depth of field so that the entire face remained in focus.
I ended up using one of the 2.4GHz "spy cameras" which might be
suitable for your application. Search Google for "wireless spy
camera" and you should find plenty. The problem is that none of them
use either BT or Wi-Fi. They use 2.4GHz VSB modulated analog video
and will require a receiver and NTSC video to computer interface. In
effect, you're transfering the bulk of the electronics from the camera
end, to the computer end. Also, you won't like the price tags.
If your laptop happens to have an NTSC composite video *INPUT*, this
might be a good way to do it. However, only a few laptops have this.
If it has a yellow phono connector, it's probably an NTSC video
*OUTPUT* which won't help.
--
Jeff Liebermann
jeffl@comix.santa-cruz.ca.us
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060
http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558