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why is the US not Metric
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Monkeh:

--- Quote from: wraper on October 26, 2019, 10:50:02 pm ---
--- Quote from: Monkeh on October 26, 2019, 10:40:38 pm ---Indeed, it's merely a stand-in for the basically identical constant-voltage DC, constant-current DC, and variable voltage or current dimming drivers, because I lack the patience to dug up specific examples of such for this guy.. Mind you, there's a multitude of 12V AC/DC operated LED lamps, dimmable and not, which are suitable for use with a supply such as this.

--- End quote ---
It's drop SMPS replacement for (usually toroidal) halogen lamp transformers.

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Yes, I'm aware of that - I've used more than a few of them. It's the first thing I had a picture of to hand. It's quite suitable for supplying 12V LED lamps so long as they take AC (which they generally do).
vad:

--- Quote from: wraper on October 26, 2019, 10:38:42 pm ---
--- Quote from: vad on October 26, 2019, 10:33:04 pm ---I, personally, have three problems with this particular device: (1) it is not UL-listed, (2) my nearest Home Depot does not stock 12VAC operated A19 LEDs, (3) I doubt it will work properly with Lurton Caseta dimmers.

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No shit Sherlock. It's rated  for 230V AC therefore not for US market. And it's not a LED driver.

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Thanks for letting me know before I ordered 50 of those. I was already pulling out credit card from the wallet.
VK3DRB:
Besides the Altium grid lines "standard" being a dog's breakfast, many Chinese PCB manufacturers only specify their capability dimensions in imperial measurements (eg: minimum track width 7mils, rather than 0.18mm). This is only to appease US engineers who cannot fathom (sorry, 1.8288m) the metric system |O (Just kidding, sort of!).

One thing the Chinese government could do is force manufacturers to publish them in both metric and imperial, or better still, ban imperial measurements all together. They could do it very quickly :box:.

Whereas if it were the British government it could take endless debates, several elections, a referendum, protests, resignations and billions of euros pounds over many years, and end up going nowhere :scared:.
CatalinaWOW:

--- Quote from: VK3DRB on October 27, 2019, 12:50:26 am ---Besides the Altium grid lines "standard" being a dog's breakfast, many Chinese PCB manufacturers only specify their capability dimensions in imperial measurements (eg: minimum track width 7mils, rather than 0.18mm). This is only to appease US engineers who cannot fathom (sorry, 1.8288m) the metric system |O (Just kidding, sort of!).

One thing the Chinese government could do is force manufacturers to publish them in both metric and imperial, or better still, ban imperial measurements all together. They could do it very quickly :box:.

Whereas if it were the British government it could take endless debates, several elections, a referendum, protests, resignations and billions of euros pounds over many years, and end up going nowhere :scared:.

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Look at the bright side.  If they specified capabilities in metric it would probably be rounded to some nice number like 0.2 mm, so you gained 10%. 
james_s:

--- Quote from: vad on October 26, 2019, 10:24:05 pm ---Unfortunately, I still have to come across AC-powered A19 LED bulb that can work reliably in fully-enclosed or semi-enclosed luminaries (up to promised 25,000+ hours MTBF, without intermittent thermal shutdowns or bricking itself). And I still have to come across AC-powered A19 LED bulb that can dim properly.

--- End quote ---

I have lots of LEDs in fully enclosed and semi enclosed fixtures, some have been in dusk till dawn service since 2011. Philips and Ecosmart mostly. I did have some issues with the hall light which is fully enclosed, has two lamps and gets run many hours a day so I put some filament type LED bulbs in there and those have been fine, I think the ones I used there are Feit.

I can't say whether any will last the full 25,000 hours because even running ~12 hours a day since 2011 I'm not there yet but so far so good. The earlier Philips ones were actually rated for 50,000 hours.

Also noteworthy is the fact that the vast majority of the heat is from the LEDs themselves, not the driver.
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