iNFRArED reach?

Archived from groups: microsoft.public.pocketpc (More info?)

i got 4150 and pocket remote controler (and sony tv), and it works only in
1m range? i expected
more, any ideas? is that all from IR, 1m?

Archived from groups: microsoft.public.pocketpc (More info?)

"Beverly Howard [Ms-MVP/MobileDev]" <BevNoSpamBevHoward.com> wrote in
message news:udA0Gd0lEHA.2892@tk2msftngp13.phx.gbl...
> varies by device, but the "standard" is officially 3 inches.

> got a videocam? either computer or camcorder in a dark room and you can
> "view" the ir output... very educational to compare it to any generic ir
> remote control.

Zat so? You can see IR?

Archived from groups: microsoft.public.pocketpc (More info?)

imho, viewing ir output has been very useful both for getting an
indication of the "brightness" and to be able to "see" the beam
orientation... point the device at a white wall or other white surface.

With all of the ppc ir output that I have put to this test, where a
standard remote control looks like a very bright flashlight, the ppc's
output is similar to viewing a ship's signal light many miles distant.

Beverly Howard [MS MVP-Mobile Devices]

Archived from groups: microsoft.public.pocketpc (More info?)

IrDA is unmodulated 850nm IR. It was designed to be very short range (1m).

CIR (Consumer IR) is almost always modulated (usually around 38kHz) 940nm
IR. It is fairly easy to get very long range as long as transmitter &
receiver are designed for the same modulation (i.e. carrier) frequency and
both are optimized for the same wavelength IR. I've gotten +30m with 3V and
a single IR emitter.

There are some remotes (mostly European) that use unmodulated IR.

CCD: Charge Coupled Device (it's the sensing element in most video cameras).

"Sanders Kaufman" <sanderskaufman@hotmail.com> wrote:

>CCD? CIR? I have a QuickCam Express and a ViewSonic V37 with a camera - do
>those guys have CCD?
>
>Are CIR and IrDA different, the same, got nothing to do with each other? I
>thought ALL InfraRed devices were "IrDA" - PC ports, remote controls, fiber
>optic... whatever.
>
>I checked out a coupla little IrDA thingys to see what was programmatically
>available. I've *seen* a lot of serial port programming (back in the
>YModem/MNP5 days) and IrDA stuff looks interesting.
>
>Any suggestions for programming resources for IrDA on the Pocket PC?
>(Mobile 2003)
>
>
>"Dave Houston" <nobody@whocares.com> wrote in message
>news:4141d4a8.182659863@nntp.fuse.net...
>> "Sanders Kaufman" <sanderskaufman@hotmail.com> wrote:
>>
>>>"Beverly Howard [Ms-MVP/MobileDev]" <BevNoSpamBevHoward.com> wrote in
>>>message news:udA0Gd0lEHA.2892@tk2msftngp13.phx.gbl...
>>>> varies by device, but the "standard" is officially 3 inches.
>>>
>>>> got a videocam? either computer or camcorder in a dark room and you can
>>>> "view" the ir output... very educational to compare it to any generic ir
>>>> remote control.
>>>
>>>Zat so? You can see IR?
>>
>> No, but the CCD in the camera can.
>>
>> However, it may not be very useful for evaluating the output of a remote.
>> It
>> will tend to show IrDA as being much brighter than CIR as the former is
>> closer to wavelengths that are visible by humans. The video camera will be
>> optimized for the visible spectrum. IrDA uses 850nm IR while CIR uses
>> 940nm.
>>
>