XPost: alt.home.repair, uk.d-i-y
From: rod.speed.aaa@gmail.com
"William Gothberg" <"William Gothberg"@internet.co.is> wrote in message
news:op.zulmjwcgo5piw3@desktop-ga2mpl8.lan...
> On Tue, 25 Dec 2018 21:55:16 -0000, Rod Speed
> wrote:
>
>>
>>
>> "William Gothberg" <"William Gothberg"@internet.co.is> wrote in message
>> news:op.zulktmp2o5piw3@desktop-ga2mpl8.lan...
>>> On Tue, 25 Dec 2018 21:00:53 -0000, Rod Speed
>>> wrote:
>>>
>>>>
>>>>
>>>> "William Gothberg" <"William Gothberg"@internet.co.is> wrote in message
>>>> news:op.zulf8qz8o5piw3@desktop-ga2mpl8.lan...
>>>>> On Tue, 25 Dec 2018 18:33:27 -0000, Rod Speed
>>>>>
>>>>> wrote:
>>>>>
>>>>>>
>>>>>>
>>>>>> "William Gothberg" <"William Gothberg"@internet.co.is> wrote in
>>>>>> message
>>>>>> news:op.zulb102po5piw3@desktop-ga2mpl8.lan...
>>>>>>> On Tue, 25 Dec 2018 17:33:52 -0000, Rod Speed
>>>>>>>
>>>>>>> wrote:
>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> "William Gothberg" <"William Gothberg"@internet.co.is> wrote in
>>>>>>>> message
>>>>>>>> news:op.zukr2cpgo5piw3@desktop-ga2mpl8.lan...
>>>>>>>>> On Thu, 20 Dec 2018 04:22:39 -0000, Clare Snyder
>>>>>>>>>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> On Wed, 19 Dec 2018 19:36:51 -0000, "William Gothberg" <"William
>>>>>>>>>> Gothberg"@internet.co.is> wrote:
>>>>>>>>>>
>>>>>>>>>>> On Wed, 19 Dec 2018 17:47:17 -0000, trader_4
>>>>>>>>>>>
>>>>>>>>>>> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> On Wednesday, December 19, 2018 at 11:35:06 AM UTC-5, William
>>>>>>>>>>>> Gothberg
>>>>>>>>>>>> wrote:
>>>>>>>>>>>>> On Wed, 19 Dec 2018 16:21:41 -0000, Mark Lloyd
>>>>>>>>>>>>>
>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>> > On 12/19/18 6:01 AM, William Gothberg wrote:
>>>>>>>>>>>>> >
>>>>>>>>>>>>> > [snip]
>>>>>>>>>>>>> >
>>>>>>>>>>>>> >> They probably are fairly crude. I know they flicker, for
>>>>>>>>>>>>> >> example
>>>>>>>>>>>>> >> if I
>>>>>>>>>>>>> >> use my cordless drill, the chuck appears to spin the wrong
>>>>>>>>>>>>> >> way
>>>>>>>>>>>>> >> under the
>>>>>>>>>>>>> >> LED lighting.
>>>>>>>>>>>>> > I remember seeing that with a washing machine (under
>>>>>>>>>>>>> > fluorescent
>>>>>>>>>>>>> > lights). As the tub was slowing down, the row of holes
>>>>>>>>>>>>> > around
>>>>>>>>>>>>> > the
>>>>>>>>>>>>> > tub
>>>>>>>>>>>>> > would appear to reverse direction. Same thing with (spoked)
>>>>>>>>>>>>> > wagon
>>>>>>>>>>>>> > wheels
>>>>>>>>>>>>> > in movies.
>>>>>>>>>>>>>
>>>>>>>>>>>>> It looks absolutely ridiculous with modern cars with LED
>>>>>>>>>>>>> headlights
>>>>>>>>>>>>> in
>>>>>>>>>>>>> films. How hard can it be to put a smoothing capacitor on the
>>>>>>>>>>>>> output
>>>>>>>>>>>>> of the power supply?
>>>>>>>>>>>>
>>>>>>>>>>>> I've never noticed that. Any films come to mind?
>>>>>>>>>>>
>>>>>>>>>>> A lot of Top Gear programs showing the DRLs of cars fitted with
>>>>>>>>>>> LEDs.
>>>>>>>>>>> With a feature film, they might take the time/trouble/money to
>>>>>>>>>>> do
>>>>>>>>>>> something to stop it.
>>>>>>>>>>>
>>>>>>>>>>>> It seems especially
>>>>>>>>>>>> weird, since cars have a 12V supply with a big battery to
>>>>>>>>>>>> smooth
>>>>>>>>>>>> anything out. I guess the power supply that reduces that to
>>>>>>>>>>>> whatever
>>>>>>>>>>>> the LED headlights use though might have a switching power
>>>>>>>>>>>> supply
>>>>>>>>>>>> these
>>>>>>>>>>>> days too.
>>>>>>>>>>>
>>>>>>>>>>> AFAIK it's deliberate, making the LEDs operate brighter than
>>>>>>>>>>> they
>>>>>>>>>>> are
>>>>>>>>>>> capable of, but only 1/4 of the time. Our eyes just see the
>>>>>>>>>>> brightest
>>>>>>>>>>> part of the cycle, so we think they're four times brighter than
>>>>>>>>>>> the
>>>>>>>>>>> LED
>>>>>>>>>>> is really capable of, without overheating itself.
>>>>>>>>>>
>>>>>>>>>> That is PWM Overdrive. Peak junction current is over the nominal
>>>>>>>>>> rating, but the average power consumption is below nominalmaximum
>>>>>>>>>> current - and the peak lumen output is significantly enhanced
>>>>>>>>>> without
>>>>>>>>>> reducing the junction life appreciably.
>>>>>>>>>> THIS would definitely cause flicker as there is a "significant"
>>>>>>>>>> dead
>>>>>>>>>> period between the "strobe flashes"
>>>>>>>>
>>>>>>>>> Agreed, although Rod thinks only freaks can see it.
>>>>>>>>
>>>>>>>> Its true with car lights.
>>>>>>>
>>>>>>> You're obviously wrong,
>>>>>>
>>>>>> We'll see...
>>>>>>
>>>>>>> just by the number of articles on the internet about it.
>>>>>>
>>>>>> That's just the freaks howling about seeing it.
>>>>>
>>>>> If it were a small number of freaks, there wouldn't so many articles
>>>>> and
>>>>> studies into it.
>>>>
>>>> Bullshit.
>>>
>>> Tell me, out of interest, when you watch TV at the usual (before HD)
>>> 25fps
>>> interlaced, can you see that it's made up of seperate images?
>>
>> Meaningless question.
>
> It would show us whether our eyes are inferior or not.
Only if it was actually a viable question.
>>> Can you notice that a moving object jumps a few inches at a time across
>>> the screen?
>>
>> Never seen that happen.
>
> Then your eyesight really sux.
Nope, those doing the movie have enough of
a clue to film it properly so that doesn't happen.
> I guess you don't bother with HD TV.
Guess again.
> I guess if you play computer games you don't care if the CPU is slow and
> the frame rate is abysmal.
The only computer game I bother with is Freecell Pro and it
works fine with any cpu and the frame rate is never a problem.
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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