Commander Kinsey wrote

Is it to warn you?

No idea what you are on about this time.

Even my toilet cistern can slow down smoothly.

Rather different technology. Many dimmers cant,
they cut off abruptly at the lower light levels.

On Tue, 4 May 2021 04:23:43 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the two subnormal sociopathic cretins' endless absolutely idiotic
blather

--
Typical retarded "conversation" between the Scottish ****** and the senile
Ozzietard:

Birdbrain: "Horse **** doesn't stink."

Senile Rodent: "It does if you roll in it."

Birdbrain: "I've never worked out why, I assumed it was maybe meateaters
that made stinky ****, but then why does vegetarian human **** stink? Is it
just the fact that we're capable of digesting meat?"

Senile Rodent: "Nope, some cow **** stinks too."

Message-ID:

Never saw the original post. There is a holding current in a triac, and once
the current drops below this a kind of Hysteresis occurs so you need to turn
it up to get it conducting again.
Brian

--

This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"Rod Speed" wrote in message
...
Commander Kinsey wrote
Is it to warn you?

No idea what you are on about this time.
Even my toilet cistern can slow down smoothly.

Rather different technology. Many dimmers cant,
they cut off abruptly at the lower light levels.

Brian Gaff (Sofa) wrote

Never saw the original post.

He ****ed up uk.d-I-y he had uk.diy

There is a holding current in a triac, and once the current drops below
this a kind of Hysteresis occurs so you need to turn it up to get it
conducting again.

leds don’t dim using triacs but still cant be dimmed right down close
to zero for use as a nightlight with the philips hues particularly.

Rod Speed wrote
Commander Kinsey wrote
Is it to warn you?

No idea what you are on about this time.
Even my toilet cistern can slow down smoothly.

Rather different technology. Many dimmers cant,
they cut off abruptly at the lower light levels.

On Tue, 4 May 2021 16:36:59 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the trolling senile asshole's latest troll**** unread

--
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cretin's pathological trolling:
https://www.pcreview.co.uk/threads/r...d-faq.2973853/

On 4/05/21 6:36 am, Peeler wrote:
On Tue, 4 May 2021 04:23:43 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the two subnormal sociopathic cretins' endless absolutely idiotic
blather



Peeler's eyes are simple eyespots, not lensed eyes that can resolve images.

On 4/05/21 7:29 pm, Peeler wrote:
On Tue, 4 May 2021 16:36:59 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the trolling senile asshole's latest troll**** unread



Peeler has no true fins and has six or eight barbels around the mouth
and a single nostril.

OK what do they use then, All I remember from my brief experience trying to
dim leds was that the most successful way of doing that was by duty cycle,
ie on to off times with them driven by some kind of oscillator with variable
mark space ratios. However it is obvious that even the briefest of ons and
the longest offs tends to still be visible in most cases, and not terribly
accurate if many leds are used as the load, there being a spread of
linearity in any given number.
Brian

--

This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"Rod Speed" wrote in message
...
Brian Gaff (Sofa) wrote

Never saw the original post.

He ****ed up uk.d-I-y he had uk.diy

There is a holding current in a triac, and once the current drops below
this a kind of Hysteresis occurs so you need to turn it up to get it
conducting again.

leds don’t dim using triacs but still cant be dimmed right down close
to zero for use as a nightlight with the philips hues particularly.

Rod Speed wrote
Commander Kinsey wrote
Is it to warn you?

No idea what you are on about this time.
Even my toilet cistern can slow down smoothly.

Rather different technology. Many dimmers cant,
they cut off abruptly at the lower light levels.

Brian Gaff (Sofa) wrote

OK what do they use then,

A controlled current regulator.

All I remember from my brief experience trying to dim leds was that the
most successful way of doing that was by duty cycle, ie on to off times
with them driven by some kind of oscillator with variable mark space
ratios.

It is much better to control the current thru the leds.

And it makes no sense to use a triac when varying
the mark/space ratio with leds anyway.

However it is obvious that even the briefest of ons and the longest offs
tends to still be visible in most cases,

That’s mad, leds have very little inertia.

and not terribly accurate if many leds are used as the load, there being a
spread of linearity in any given number.

That would be a mad approach too.

Rod Speed wrote
Brian Gaff (Sofa) wrote

Never saw the original post.

He ****ed up uk.d-I-y he had uk.diy

There is a holding current in a triac, and once the current drops below
this a kind of Hysteresis occurs so you need to turn it up to get it
conducting again.

leds don’t dim using triacs but still cant be dimmed right down close
to zero for use as a nightlight with the philips hues particularly.

Rod Speed wrote
Commander Kinsey wrote
Is it to warn you?

No idea what you are on about this time.
Even my toilet cistern can slow down smoothly.

Rather different technology. Many dimmers cant,
they cut off abruptly at the lower light levels.

On 04/05/2021 13:23, Brian Gaff (Sofa) wrote:
OK what do they use then, All I remember from my brief experience trying to
dim leds was that the most successful way of doing that was by duty cycle,
ie on to off times with them driven by some kind of oscillator with variable
mark space ratios. However it is obvious that even the briefest of ons and
the longest offs tends to still be visible in most cases, and not terribly
accurate if many leds are used as the load, there being a spread of
linearity in any given number.

PWM is the cheapest way as it needs no other component.

For a small improvement in efficiency then a constant current source
would be best but obviously costs more.

"Fredxx" wrote in message
...
On 04/05/2021 13:23, Brian Gaff (Sofa) wrote:
OK what do they use then, All I remember from my brief experience trying
to
dim leds was that the most successful way of doing that was by duty
cycle,
ie on to off times with them driven by some kind of oscillator with
variable
mark space ratios. However it is obvious that even the briefest of ons
and
the longest offs tends to still be visible in most cases, and not
terribly
accurate if many leds are used as the load, there being a spread of
linearity in any given number.

PWM is the cheapest way as it needs no other component.

For a small improvement in efficiency then a constant current source would
be best but obviously costs more.

Doesnt necessarily cost anything more at all with leds. Same price as
voltage regulators.

On Wed, 5 May 2021 02:31:42 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the trolling senile asshole's latest troll**** unread

02:31??? AGAIN? Is your senility not letting you sleep in again, you
abnormal senile troll?

--
Website (from 2007) dedicated to the 86-year-old senile Australian
cretin's pathological trolling:
https://www.pcreview.co.uk/threads/r...d-faq.2973853/

On Wed, 5 May 2021 03:33:20 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the trolling senile pest's latest troll**** unread

--
Xeno to senile Rodent:
"You're a sad old man Rod, truly sad."
MID:

On 04/05/2021 17:38, Fredxx wrote:
On 04/05/2021 13:23, Brian Gaff (Sofa) wrote:

OK what do they use then, All I remember from my brief experience
trying to
dim leds was that the most successful way of doing that was by duty
cycle,
ie on to off times with them driven by some kind of oscillator with
variable
mark space ratios. However it is obvious that even the briefest of ons
and
the longest offs tends to still be visible in most cases, and not
terribly
accurate if many leds are usedÂ* as the load, there being a spread of
linearity in any given number.

PWM is the cheapest way as it needs no other component.

Yes, I made a PWM dimmer circuit (for fun) based on circuits I found on
the Internet and it works well, and dims to nothingness. (12VDC working
a white LED strip.)

--
Max Demian

On 04/05/2021 22:00, Max Demian wrote:
On 04/05/2021 17:38, Fredxx wrote:
On 04/05/2021 13:23, Brian Gaff (Sofa) wrote:

OK what do they use then, All I remember from my brief experience
trying to
dim leds was that the most successful way of doing that was by duty
cycle,
ie on to off times with them driven by some kind of oscillator with
variable
mark space ratios. However it is obvious that even the briefest of
ons and
the longest offs tends to still be visible in most cases, and not
terribly
accurate if many leds are usedÂ* as the load, there being a spread of
linearity in any given number.

PWM is the cheapest way as it needs no other component.

Yes, I made a PWM dimmer circuit (for fun) based on circuits I found on
the Internet and it works well, and dims to nothingness. (12VDC working
a white LED strip.)

do it at high enough frequency and there is no visible flicker, and you
can feed the LEDS via a small ferrite inductor with a parallel capacitor
and reduce HF flicker too.

--
The theory of Communism may be summed up in one sentence: Abolish all
private property.

Karl Marx

On 5/05/21 6:39 am, Peeler wrote:
On Wed, 5 May 2021 02:31:42 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the trolling senile asshole's latest troll**** unread

02:31??? AGAIN? Is your senility not letting you sleep in again, you
abnormal senile troll?

Peeler's eyes are simple eyespots, not lensed eyes that can resolve images.

On 5/05/21 6:40 am, Peeler wrote:
On Wed, 5 May 2021 03:33:20 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the trolling senile pest's latest troll**** unread

Peeler's skin is only attached to the body along the center ridge of the
back and at the slime glands, and is filled with close to a third of the
body's blood volume, giving the impression of a blood-filled sack.

On Mon, 03 May 2021 19:23:43 +0100, Rod Speed wrote:

Commander Kinsey wrote

Is it to warn you?

No idea what you are on about this time.

It's obvious what I meant, the car warns the driver he's revving too high by making the engine jump on and off.

--
Sent from my iPhone, this spam courtesy of Apple incorporated.

On Tue, 04 May 2021 18:33:20 +0100, Rod Speed wrote:



"Fredxx" wrote in message
...
On 04/05/2021 13:23, Brian Gaff (Sofa) wrote:
OK what do they use then, All I remember from my brief experience trying
to
dim leds was that the most successful way of doing that was by duty
cycle,
ie on to off times with them driven by some kind of oscillator with
variable
mark space ratios. However it is obvious that even the briefest of ons
and
the longest offs tends to still be visible in most cases, and not
terribly
accurate if many leds are used as the load, there being a spread of
linearity in any given number.

PWM is the cheapest way as it needs no other component.

For a small improvement in efficiency then a constant current source would
be best but obviously costs more.

Doesnt necessarily cost anything more at all with leds. Same price as
voltage regulators.

But if I buy a "dimmable LED" lightbulb, I can dim it with a dimmer that's on the wall, at 240V AC. Is there electronics inside the bulb sensing the PWM from the dimmer and using that to control its internal current limiter?

--
Sent from my iPhone, this spam courtesy of Apple incorporated.

On Wed, 05 May 2021 09:14:18 +0100, The Natural Philosopher wrote:

On 04/05/2021 22:00, Max Demian wrote:
On 04/05/2021 17:38, Fredxx wrote:
On 04/05/2021 13:23, Brian Gaff (Sofa) wrote:

OK what do they use then, All I remember from my brief experience
trying to
dim leds was that the most successful way of doing that was by duty
cycle,
ie on to off times with them driven by some kind of oscillator with
variable
mark space ratios. However it is obvious that even the briefest of
ons and
the longest offs tends to still be visible in most cases, and not
terribly
accurate if many leds are used as the load, there being a spread of
linearity in any given number.

PWM is the cheapest way as it needs no other component.

Yes, I made a PWM dimmer circuit (for fun) based on circuits I found on
the Internet and it works well, and dims to nothingness. (12VDC working
a white LED strip.)

do it at high enough frequency and there is no visible flicker, and you
can feed the LEDS via a small ferrite inductor with a parallel capacitor
and reduce HF flicker too.

Please tell the car manufacturers how to do this so I don't have to watch flickering tail lights while driving behind someone, or flashing headlights on TV.

--
Sent from my iPhone, this spam courtesy of Apple incorporated.

"Commander Kinsey" wrote in message
news
On Tue, 04 May 2021 18:33:20 +0100, Rod Speed
wrote:



"Fredxx" wrote in message
...
On 04/05/2021 13:23, Brian Gaff (Sofa) wrote:
OK what do they use then, All I remember from my brief experience
trying
to
dim leds was that the most successful way of doing that was by duty
cycle,
ie on to off times with them driven by some kind of oscillator with
variable
mark space ratios. However it is obvious that even the briefest of ons
and
the longest offs tends to still be visible in most cases, and not
terribly
accurate if many leds are used as the load, there being a spread of
linearity in any given number.

PWM is the cheapest way as it needs no other component.

For a small improvement in efficiency then a constant current source
would
be best but obviously costs more.

Doesnt necessarily cost anything more at all with leds. Same price as
voltage regulators.

But if I buy a "dimmable LED" lightbulb, I can dim it with a dimmer that's
on the wall, at 240V AC. Is there electronics inside the bulb sensing the
PWM from the dimmer and using that to control its internal current
limiter?

I was talking about led bulbs that dim without a dimmer thats on the
wall. The dimmer is internal and just has a current regulator instead
of a voltage regulator that costs the same. No PWM involved.

On Mon, 10 May 2021 05:24:27 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the two subnormal sociopathic cretins' endless absolutely idiotic
blather

--
Another typical retarded conversation between our two village idiots,
Birdbrain and Rodent Speed:

Birdbrain: "You beat me to it. Plain sex is boring."

Senile Rodent: "Then **** the cats. That wont be boring."

Birdbrain: "Sell me a de-clawing tool first."

Senile Rodent: "Wont help with the teeth."

Birdbrain: "They've never gone for me with their mouths."

Rodent Speed: "They will if you are stupid enough to try ****ing them."

Birdbrain: "No, they always use claws."

Rodent Speed: "They wont if you try ****ing them. Try it and see."

Message-ID:

On 10/05/21 7:42 am, Peeler wrote:
On Mon, 10 May 2021 05:24:27 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the two subnormal sociopathic cretins' endless absolutely idiotic
blather

Peeler's musculature differs from jawed vertebrates in that he does not
have a horizontal septum nor vertical septum, junctions of connective
tissue that separate the hypaxial musculature and epaxial musculature.

On 03/05/2021 19:23, Rod Speed wrote:
Commander Kinsey wrote
Is it to warn you?

No idea what you are on about this time.
Even my toilet cistern can slow down smoothly.

Rather different technology. Many dimmers cant,
they cut off abruptly at the lower light levels.

The only dimmer around here is you.

On Sun, 09 May 2021 20:24:27 +0100, Rod Speed wrote:



"Commander Kinsey" wrote in message
news
On Tue, 04 May 2021 18:33:20 +0100, Rod Speed
wrote:



"Fredxx" wrote in message
...
On 04/05/2021 13:23, Brian Gaff (Sofa) wrote:
OK what do they use then, All I remember from my brief experience
trying
to
dim leds was that the most successful way of doing that was by duty
cycle,
ie on to off times with them driven by some kind of oscillator with
variable
mark space ratios. However it is obvious that even the briefest of ons
and
the longest offs tends to still be visible in most cases, and not
terribly
accurate if many leds are used as the load, there being a spread of
linearity in any given number.

PWM is the cheapest way as it needs no other component.

For a small improvement in efficiency then a constant current source
would
be best but obviously costs more.

Doesnt necessarily cost anything more at all with leds. Same price as
voltage regulators.

But if I buy a "dimmable LED" lightbulb, I can dim it with a dimmer that's
on the wall, at 240V AC. Is there electronics inside the bulb sensing the
PWM from the dimmer and using that to control its internal current
limiter?

I was talking about led bulbs that dim without a dimmer thats on the
wall. The dimmer is internal and just has a current regulator instead
of a voltage regulator that costs the same. No PWM involved.

And now you must talk of the other kind.

--
Sent from my iPhone, this spam courtesy of Apple incorporated.

Commander Kinsey wrote
Rod Speed wrote
Commander Kinsey wrote
Rod Speed wrote
Fredxx wrote
Brian Gaff (Sofa) wrote

OK what do they use then, All I remember from my brief experience
trying to dim leds was that the most successful way of doing that was
by duty cycle, ie on to off times with them driven by some kind of
oscillator with variable mark space ratios. However it is obvious
that even the briefest of ons and the longest offs tends to still be
visible in most cases, and not terribly accurate if many leds are
used as the load, there being a spread of linearity in any given
number.

PWM is the cheapest way as it needs no other component.

For a small improvement in efficiency then a constant current source
would be best but obviously costs more.

Doesnt necessarily cost anything more at all with leds. Same price as
voltage regulators.

But if I buy a "dimmable LED" lightbulb, I can dim it with a dimmer
that's on the wall, at 240V AC. Is there electronics inside the bulb
sensing the PWM from the dimmer and using that to control its internal
current limiter?

I was talking about led bulbs that dim without a dimmer thats on the
wall. The dimmer is internal and just has a current regulator instead of
a voltage regulator that costs the same. No PWM involved.

And now you must talk of the other kind.

Nope, because dimmers on the wall are dinosaur technology. Much
better to have the dimmer in the bulb itself so it can be automatically
controlled as a scene etc so that when you indicate that you are
watching TV it sets the lights to the level that you have decided is
best for that, turns the TV on and plays what you have indicated
you want to watch when you select what you want to watch.

Stupid to have to fart around adjusting the lights with the dimmer
on the wall etc.

On Wed, 19 May 2021 10:39:27 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the two subnormal sociopathic cretins' endless absolutely idiotic
blather

--
Another typical retarded "conversation" between Birdbrain and senile Rodent:

Senile Rodent: " Did you ever dig a hole to bury your own ****?"

Birdbrain: "I do if there's no flush toilet around."

Senile Rodent: "Yeah, I prefer camping like that, off by myself with
no dunnys around and have always buried the ****."

MID:

On 19/05/21 7:40 pm, Peeler wrote:
On Wed, 19 May 2021 10:39:27 +1000, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the two subnormal sociopathic cretins' endless absolutely idiotic
blather


Peeler's poorly developed eyes are buried under the skin, and there is a
single nostril at the end of his snout.

On Wed, 19 May 2021 21:26:35 +1200, Peter Keller, the dumb gay masochistic
little cyclist, blabbered again:



Peeler's poorly developed eyes are buried under the skin, and there is a
single nostril at the end of his snout.

The dumbest gay little cyclist of the UK is demonstrating his exceptional
STUPIDITY again! LOL

On 19/05/21 9:36 pm, Peeler wrote:
On Wed, 19 May 2021 21:26:35 +1200, Peter Keller, the dumb gay masochistic
little cyclist, blabbered again:



Peeler's poorly developed eyes are buried under the skin, and there is a
single nostril at the end of his snout.

The dumbest gay little cyclist of the UK is demonstrating his exceptional
STUPIDITY again! LOL

Peeler lives on soft bottoms, in burrows, and habitually lies buried
except for the tip of his head.

On Thu, 20 May 2021 21:00:12 +1200, Peter Keller, the dumb gay masochistic
little cyclist, blabbered again:


The dumbest gay little cyclist of the UK is demonstrating his exceptional
STUPIDITY again! LOL

Peeler lives on soft bottoms, in burrows, and habitually lies buried
except for the tip of his head.

And again: The UK's dumbest gay little cyclist demonstrated his exceptional
STUPIDITY once more! LOL