On 2006-08-22, N Cook wrote:

That is going across continents.

there's a open remote project on sourceforge, i'm not siure what they use to
record, I think either IRDA or some cheap hardware.

To transfer the pulse coding of a remote control at one site to another
learnable type remote control maybe the other side of the world.
Can anyone think of a method that uses off the shelf equipment used in a
domestic environment , ie not using oscilloscopes etc.
Somehow slowing the pulse stream down enough to capture on cam-corder/pc
etc.

Would the average r/c with say a 400 KHz ceramic resonator still function
with the 400KHz one replaced with 100KHz one say.?

probably.

the pulse rate is ~40Khz most PCs can handle that.



--

Bye.
Jasen

jasen wrote in message
...
On 2006-08-22, N Cook wrote:

That is going across continents.

there's a open remote project on sourceforge, i'm not siure what they use
to
record, I think either IRDA or some cheap hardware.

To transfer the pulse coding of a remote control at one site to another
learnable type remote control maybe the other side of the world.
Can anyone think of a method that uses off the shelf equipment used in a
domestic environment , ie not using oscilloscopes etc.
Somehow slowing the pulse stream down enough to capture on cam-corder/pc
etc.

Would the average r/c with say a 400 KHz ceramic resonator still
function
with the 400KHz one replaced with 100KHz one say.?

probably.

the pulse rate is ~40Khz most PCs can handle that.



--

Bye.
Jasen

I don't own a web-cam but anyone know what would happen if
you replaced the IR LED with a diffused red LED and shone it close to a web
cam.
Starting with a normal IR R/C with its original crystal and normal pulsed
output of 25uS per pulse and 20 pulses per bit of data. Would that produce a
resolvable video stream that could be sent via internet and assuming a wide
enough acceptance spectrum of the receiving phototransistor/diode of a
learner type universal r/c straight off a pc monitor in a dark room.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

N Cook wrote:
jasen wrote in message
...
On 2006-08-22, N Cook wrote:
[----8----]
To transfer the pulse coding of a remote control at one site to another
learnable type remote control maybe the other side of the world.
Can anyone think of a method that uses off the shelf equipment used in a
domestic environment , ie not using oscilloscopes etc.
Somehow slowing the pulse stream down enough to capture on cam-corder/pc
etc.

Would the average r/c with say a 400 KHz ceramic resonator still
function
with the 400KHz one replaced with 100KHz one say.?

probably.

the pulse rate is ~40Khz most PCs can handle that.

I don't own a web-cam but anyone know what would happen if
you replaced the IR LED with a diffused red LED and shone it close to a web
cam.
Starting with a normal IR R/C with its original crystal and normal pulsed
output of 25uS per pulse and 20 pulses per bit of data.

Webcams can usually see near-IR reasonably well anayway.

Would that produce a
resolvable video stream that could be sent via internet and assuming a wide
enough acceptance spectrum of the receiving phototransistor/diode of a
learner type universal r/c straight off a pc monitor in a dark room.

No. Webcams can manage perhaps 30fps. You'd need something much, much
faster.


Tim

N Cook wrote:
Starting with a normal IR R/C with its original crystal and normal pulsed
output of 25uS per pulse and 20 pulses per bit of data. Would that produce a
resolvable video stream that could be sent via internet and assuming a wide
enough acceptance spectrum of the receiving phototransistor/diode of a
learner type universal r/c straight off a pc monitor in a dark room.

I did that in the 1980's with an IR photodiode, an LM324 op amp and an
IR LED. Another thing I should of patented.

Geoff.

--
Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM
IL Voice: (07)-7424-1667 Fax ONLY: 972-2-648-1443 U.S. Voice: 1-215-821-1838
Visit my 'blog at http://geoffstechno.livejournal.com/

Geoffrey S. Mendelson wrote in message
...
N Cook wrote:
Starting with a normal IR R/C with its original crystal and normal
pulsed
output of 25uS per pulse and 20 pulses per bit of data. Would that
produce a
resolvable video stream that could be sent via internet and assuming a
wide
enough acceptance spectrum of the receiving phototransistor/diode of a
learner type universal r/c straight off a pc monitor in a dark room.

I did that in the 1980's with an IR photodiode, an LM324 op amp and an
IR LED. Another thing I should of patented.

Geoff.

--
Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM
IL Voice: (07)-7424-1667 Fax ONLY: 972-2-648-1443 U.S. Voice:
1-215-821-1838
Visit my 'blog at http://geoffstechno.livejournal.com/

Thinking of worthy patentable devices
I wonder if anyone makes this sort of truly unirversal r/c for those
annoying situations of one or more key functions missing from the one you
want.

2 stages
1/ Just the recognition code going through all possible permutations
to find the basic power on/off repeated sequence.
Lock that down in memory
2/ and then after that specific code, all operational bit sequences until
that does a function on the TV etc and lock that to a button on the r/c.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/

On 2006-08-24, N Cook wrote:

Thinking of worthy patentable devices
I wonder if anyone makes this sort of truly unirversal r/c for those
annoying situations of one or more key functions missing from the one you
want.

2 stages
1/ Just the recognition code going through all possible permutations
to find the basic power on/off repeated sequence.
Lock that down in memory

you would die waiting if it went through all possible codes.

2/ and then after that specific code, all operational bit sequences until
that does a function on the TV etc and lock that to a button on the r/c.

that bit is somewhat easier... once the baudrate, carrier frequency,
and encoding scheme are known all that remains is to experiment with
hundereds of possible symbols.

Bye.
Jasen

On 2006-08-23, N Cook wrote:

the pulse rate is ~40Khz most PCs can handle that.

Bye.
Jasen

I don't own a web-cam but anyone know what would happen if
you replaced the IR LED with a diffused red LED and shone it close to a web
cam.

I don't think web cams record an analog video stream...
and if they did the compression would mangle it beyond recognition.

Starting with a normal IR R/C with its original crystal and normal pulsed
output of 25uS per pulse and 20 pulses per bit of data. Would that produce a
resolvable video stream that could be sent via internet and assuming a wide
enough acceptance spectrum of the receiving phototransistor/diode of a
learner type universal r/c straight off a pc monitor in a dark room.

webcam video uses a much lower frame rate than pc monitors use...

--

Bye.
Jasen