infra red

G

Grange

Guest
I have a universal remote. When the batteries get low, one of my devices
still responds to the remote, but another device doesn't.

What would be the cause of this? I assume there is the same amount of
electricity going to both devices since they both plug into the wall. Could
it be that the infra red receiving unit in one of the devices is simply of
lower sensitivity than the other one?
 
"Grange" <grange@grange.zzz> wrote in message
news:jcsmen$ug$1@speranza.aioe.org...
I have a universal remote. When the batteries get low, one of my devices
still responds to the remote, but another device doesn't.

What would be the cause of this? I assume there is the same amount of
electricity going to both devices since they both plug into the wall.
Could it be that the infra red receiving unit in one of the devices is
simply of lower sensitivity than the other one?
Click to expand...
Some things have crap IR remotes - my Sony VCR needs the remote to be
accurately aimed at point-blank range.

In the end I gave up and bought a DVB-T recorder.

Look on the bright side - in the days of ultrasonic remotes, a lorry going
down the street applying air-brakes used to turn everyone's telly off.
 
responding to http://www.electrondepot.com/australian/infra-red-52877-.htm
DA wrote:
Ian Field wrote:

Look on the bright side - in the days of ultrasonic remotes
Click to expand...
....

Learning something new every day. Ultrasonic remotes? Never heard of this
type until today. Turn out that's how they flipped channels in the 70s :)
I wonder if some fine tuned whistles could also work on those? Like a 70s
version of TV-be-Gone?

-------------------------------------
/_/
((@v@))
():::()
VV-VV
 
On 23/12/2011 4:38 AM, DA wrote:
responding to http://www.electrondepot.com/australian/infra-red-52877-.htm
DA wrote:
Ian Field wrote:

Look on the bright side - in the days of ultrasonic remotes

...

Learning something new every day. Ultrasonic remotes? Never heard of this
type until today. Turn out that's how they flipped channels in the 70s :)
I wonder if some fine tuned whistles could also work on those? Like a 70s
version of TV-be-Gone?
Click to expand...
I used to enjoy walking through the local David Jones TV department
jangling a bunch of keys, watching their display TVs switch to random
channels.
 
keithr wrote:
On 23/12/2011 4:38 AM, DA wrote:
responding to
http://www.electrondepot.com/australian/infra-red-52877-.htm
DA wrote:
Ian Field wrote:

Look on the bright side - in the days of ultrasonic remotes

...

Learning something new every day. Ultrasonic remotes? Never heard of this
type until today. Turn out that's how they flipped channels in the 70s :)
I wonder if some fine tuned whistles could also work on those? Like a 70s
version of TV-be-Gone?

I used to enjoy walking through the local David Jones TV department
jangling a bunch of keys, watching their display TVs switch to random
channels.

the squeak of closing blinds used to switch them off.
Click to expand...
 
On 12/23/2011 4:57 AM, F Murtz wrote:
keithr wrote:
On 23/12/2011 4:38 AM, DA wrote:
responding to
http://www.electrondepot.com/australian/infra-red-52877-.htm
DA wrote:
Ian Field wrote:

Look on the bright side - in the days of ultrasonic remotes

...

Learning something new every day. Ultrasonic remotes? Never heard of
this
type until today. Turn out that's how they flipped channels in the
70s :)
I wonder if some fine tuned whistles could also work on those? Like a
70s
version of TV-be-Gone?

I used to enjoy walking through the local David Jones TV department
jangling a bunch of keys, watching their display TVs switch to random
channels.

the squeak of closing blinds used to switch them off.
Click to expand...
Then some can recall when the remote was connected with a cable !!
 
"Rheilly Phoull"

Then some can recall when the remote was connected with a cable !!
Click to expand...

** Nothing wrong with that - just follow the cable to find the lost remote
!!

The one fitted to mid 60s Krieslers had brightness, volume and channel
up/down - it even had a small speaker for private listening ( like a drive
in ) and a mini jack for an earpiece.

The turret tuner in the set was driven around by an AC motor and stopped at
pre-set positions, each channel had its own fine tune control. On the front
panel were 12 indicator lights to show which VHF channel was on.

Channel surfing during commercials was brilliant innovation.


.... Phil
 
On 12/23/2011 9:04 AM, Phil Allison wrote:
"Rheilly Phoull"

Then some can recall when the remote was connected with a cable !!


** Nothing wrong with that - just follow the cable to find the lost remote
!!

The one fitted to mid 60s Krieslers had brightness, volume and channel
up/down - it even had a small speaker for private listening ( like a drive
in ) and a mini jack for an earpiece.

The turret tuner in the set was driven around by an AC motor and stopped at
pre-set positions, each channel had its own fine tune control. On the front
panel were 12 indicator lights to show which VHF channel was on.

Channel surfing during commercials was brilliant innovation.


... Phil





Yeah, that was the one I was thinking of. The ideas are all old, only
Click to expand...
the methods are changing I reckon.

Rheilly
 
Rheilly Phoull wrote:
On 12/23/2011 4:57 AM, F Murtz wrote:
keithr wrote:
On 23/12/2011 4:38 AM, DA wrote:
responding to
http://www.electrondepot.com/australian/infra-red-52877-.htm
DA wrote:
Ian Field wrote:

Look on the bright side - in the days of ultrasonic remotes

...

Learning something new every day. Ultrasonic remotes? Never heard of
this
type until today. Turn out that's how they flipped channels in the
70s :)
I wonder if some fine tuned whistles could also work on those? Like a
70s
version of TV-be-Gone?

I used to enjoy walking through the local David Jones TV department
jangling a bunch of keys, watching their display TVs switch to random
channels.

the squeak of closing blinds used to switch them off.

Then some can recall when the remote was connected with a cable !!
Click to expand...

Threw one of those out three weeks ago when moving (manufactured just
about when they stopped using valves)
 
On Wed, 21 Dec 2011 17:00:24 -0000 "Ian Field"
<gangprobing.alien@ntlworld.com> wrote in Message id:
<VgoIq.129537$CC2.3067@newsfe20.ams2>:

"Grange" <grange@grange.zzz> wrote in message
news:jcsmen$ug$1@speranza.aioe.org...
I have a universal remote. When the batteries get low, one of my devices
still responds to the remote, but another device doesn't.

What would be the cause of this? I assume there is the same amount of
electricity going to both devices since they both plug into the wall.
Could it be that the infra red receiving unit in one of the devices is
simply of lower sensitivity than the other one?

Some things have crap IR remotes - my Sony VCR needs the remote to be
accurately aimed at point-blank range.

In the end I gave up and bought a DVB-T recorder.

Look on the bright side - in the days of ultrasonic remotes, a lorry going
down the street applying air-brakes used to turn everyone's telly off.
Click to expand...
Were those the remotes that had tuning forks in them? I remember having
one of those, but I didn't think they were ultrasonic.
 
On Dec 23, 11:04 am, "Phil Allison" <phi...@tpg.com.au> wrote:
"Rheilly Phoull"

Then some can recall when the remote was connected with a cable !!

** Nothing wrong with that  -  just follow the cable to find the lost remote
!!

The one fitted to mid 60s Krieslers had brightness, volume and channel
up/down -  it even had a small speaker for private listening ( like a drive
in ) and a mini jack for an earpiece.

The turret tuner in the set was driven around by an AC motor and stopped at
pre-set positions, each channel had its own fine tune control.  On the front
panel were 12 indicator lights to show which VHF channel was on.

Channel surfing during commercials was brilliant innovation.

...   Phil
Click to expand...


I can remember seeing one of those around 1976 (when I was still
young:), and was really impressed by it. Don't remember the brightness
control but it had the inbuilt speaker, and the other goodies. A
friend's elderly grandmother had it, as at her age she was confined to
a chair for most of the day, and this was great for her not to have to
get up to change channels, or turn the set down when the phone rang
etc.



We still had a B&W Astor "Royal" set that you had to get up and change
the channel, but with only 2 channels in our area at the time, it
wasnt as big a drama as it would be now, where you can flip around
about 15 or so, and still find nothing to watch.

As a teenager, I remember making up a "remote power switch" for the TV
in my room, it involved a cable and a 240v switch.
 
"JW" <none@dev.null> wrote in message
news:0bl8f7dhr3buhavo29h4gn4c3ee5m0rodj@4ax.com...
On Wed, 21 Dec 2011 17:00:24 -0000 "Ian Field"
gangprobing.alien@ntlworld.com> wrote in Message id:
VgoIq.129537$CC2.3067@newsfe20.ams2>:


"Grange" <grange@grange.zzz> wrote in message
news:jcsmen$ug$1@speranza.aioe.org...
I have a universal remote. When the batteries get low, one of my devices
still responds to the remote, but another device doesn't.

What would be the cause of this? I assume there is the same amount of
electricity going to both devices since they both plug into the wall.
Could it be that the infra red receiving unit in one of the devices is
simply of lower sensitivity than the other one?

Some things have crap IR remotes - my Sony VCR needs the remote to be
accurately aimed at point-blank range.

In the end I gave up and bought a DVB-T recorder.

Look on the bright side - in the days of ultrasonic remotes, a lorry going
down the street applying air-brakes used to turn everyone's telly off.

Were those the remotes that had tuning forks in them? I remember having
one of those, but I didn't think they were ultrasonic.
Click to expand...
The early remotes used a frequency discriminator to produce a signal voltage
level which was decoded to the remote function.

Tuning forks probably preceeded an oscillator with a pushbutton selected
resistor chan in the RC circuit.

From that point it doesn't matter whether the tones are carried to the TV by
a cable or used to modulate the drive to an ultrasonic transducer.
 
On Wed, 21 Dec 2011 21:20:19 +0800, "Grange" <grange@grange.zzz>
wrote:

I have a universal remote. When the batteries get low, one of my devices
still responds to the remote, but another device doesn't.

What would be the cause of this? I assume there is the same amount of
electricity going to both devices since they both plug into the wall. Could
it be that the infra red receiving unit in one of the devices is simply of
lower sensitivity than the other one?
Click to expand...
That would be my guess.

==========
 
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