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1
Discussions - Public / Re: Stock photo sites
« on: December 13, 2017, 05:51:07 PM »


I am not following what kind of photos you want. Here are very neat nature pics. If you want to use those as a background.

https://www.flickr.com/photos/tj_simon/11617256636/in/photostream/

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Discussions - Public / Re: LED light bulbs are finally here!
« on: December 06, 2017, 08:27:09 AM »
Actually LEDs do get hot but the heat is internal. It is not emitted forward with the light. I have a few custom torches that run well above 1000 lumens - sustained - and the essential component in the design is the heat sink. The flashlights have heavy brass or copper heatsinks. Cheaper Chiniese bulbs or torches vastly overstate lumens. They may generate 2000 lumens for 2 minutes and then drop to 800.

Heat is actually a serious problem with LEDS once you get above 800 lumens or so.

3
Loco Stories / Humor / Re: Musk introduces the Tesla Semi
« on: December 04, 2017, 03:13:34 PM »

True enough. But surely you heard how they introduced this new Li-ion battery that charges in a few minutes..

If that's true, then it changes things.

4
Discussions - Public / Re: Are All LED TVs Pretty Much The Same?
« on: December 04, 2017, 03:12:27 PM »

The thing that's missing is the refresh rate. It really becomes obvious when you are watching anything that involves motion, like sports, or action movies or anything that's moving.

I've had a high end but old  1080 (full HD) unit.. maybe 5 years old. It was a 240Hz refresh rate unit.  It kicked butt showing action movies and sports - and I don't really watch sports.  I upgraded it to a 4K Black Friday unit and it was stunning in terms of details, had that wow factor that the older 1080 lacked.  You could see every microbe on every amoeba on every blade of grass.

However, I noticed that the older one displayed motion better, much better. The new 4K was only 60Hz. You want at least 120 HZ and 240 Hz is even better. There are classic movies that show you how well a TV responds to motion. For example: Matrix, the scene with the rain. The reason it's significant because it also shows you black. An expensive 4K will display blacks as very black, cheaper units will have blacks as slightly gray. That rain scene in Matrix combines both of these difficult functions: Rain at night and tests both of them.

The stuff on Black Friday, the 55" 4K units for $399 you can skip, if you watch action / sports, you won't be happy. Normal news and movies appear just fine however.

Costco/Best buy/Chimart don't play 4K source I don't think, their PQ sucks. They don't play source that really demos the capabilities of the units. They play compressed shyt over the cable, not via a 4K "redray" disk. 
Having said that, I saw some OLED TVs at Best Buy the other day, they were very expensive - well, relatively so but man, the color just jumps at you. Very saturated, life-like. I thought OLED was a BS gimmick.






5
Discussions - Public / Re: LED light bulbs are finally here!
« on: December 04, 2017, 02:47:58 PM »
Gorn and Ilconsigliere -- I only wish I had your electrical talents. I hope to evolve to your level one day where I won't be paying through the nose for something I could have done myself.

Meanwhile -- I noticed that the new 60-watt-equivalent Ecosmart LEDs I bought from Home Depot are way brighter than the Ecosmart 60-watt-equivalent CFLs I have.

I looked at the lumens, and the brighter bulbs actually have less lumens than the dimmer ones (840 vs 900)!  Say what?  I thought lumens were supposed to be the measure of how bright the bulb is.

Then I discovered that the Kelvin "color temperature" is the definitive factor in my case.

The bulbs with the higher Kelvin CT seem much brighter than those with lower KCT (5500 vs 2700), even tho they have less lumens!

I never knew to look at this before. I incorrectly thought it was all about lumens and incandescent-watt-equivalents.

KCT chart and explanation -- www.lumens.com/how-tos-and-advice/kelvin-color-temperature.html

Its not hard to pick it up. I know you can do it as you are smart. I knew a lot of it from years and years of being around it but there is stuff I didn't know so I got this book many years ago:

Electrical Wiring Residential by Ray C. Mullin.

This is the book that electricians learn from in school. If you buy it new its like $100+ but you can get a copy off of Ebay for $10. No joke. You don't need the latest one which has all the current electrical codes. The codes keep changing all the time. Any book from the last 10 years is good enough. As LEDs are evolving so rapidly they are not typically in the book anyway.

Yes Lumens is a funny thing. I have seen the same thing myself. Kelvin measures the color temperature of the light I typically try to install recessed lights of about 3500-4000 kelvin. To low a temperature the color of the light is more golden, to bright of a temperature - like 5000-6000 its very harsh bright bluefish light.

You can see the color of the light in this picture:





This is very cool. I buy around 5000K. I think sunlight is 3500K or so. I've noticed that all things being equal, 5500K and above actually generates more lumens  - given the same Amps, the same everything but the color rendition really sucks.

I visited this local battery store, they happened to have some unusual LED bulbs. I got this weird green bulb on sale.   For the X-mas season. Consumes just a few bucks annually.  It's actually bright green neon type green, very light green, closer to white really than to green.


There is something about the design of the LED where they emit more lumens in the white to blue spectrum. And are less efficient in the 3500K spectrum.




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Discussions - Public / Re: How can i start dropshipping business in Canada?
« on: November 27, 2017, 06:23:28 AM »
I see

7
Discussions - Public / Re: LED light bulbs are finally here!
« on: November 27, 2017, 05:37:11 AM »
The Costco brand, Feit is apparently troublesome. Amazon reviews are at 3.5 stars. Home Depot brand is nicer. I got the 100w replacement - nice.

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Loco Stories / Humor / Re: Musk introduces the Tesla Semi
« on: November 19, 2017, 07:22:36 AM »
I am sure it's not miles per gallon but gallons per mile type of thing..

9
Loco Stories / Humor / Re: Musk introduces the Tesla Semi
« on: November 18, 2017, 10:00:34 PM »
There is something unique to the electric car, where it immediately throws all the max torque at the drivetrain bypassing all the intermediate levels. Versus an internal combustion engine that has to rev up to a certain point.
 That's why the fastest car in the world is electric.  Remember that youtube video, where they build some Toyota POS into an electric monster that kicked the rear end of race cars like Camaro, Porsche, Lambo, etc.

So yeah, I believe his claim. Not sure it's as valid with the load, certainly. But empty - I believe it.




10
Understood.  It doesn't seem then that this will extend to the Linux host environment, if that is what the question was inquiring.

11
You can run the default firewall, ipchains and don't install crazy stuff.  I've never had any Unix/Linux based system get infected, ever.

I also scan the disks with various utilities to identify a virus. You can cron them.

12
Discussions - Public / Netflix: The IT Crowd
« on: November 04, 2017, 07:19:10 PM »

Currently engaged in that show, looks promising.

13
Discussions - Public / Re: Buying hardware one generation behind
« on: November 02, 2017, 03:35:05 AM »
Interesting

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Discussions - Public / Re: Buying hardware one generation behind
« on: October 31, 2017, 09:18:10 AM »
re: planned obsolescence

good point. Did you notice how fewer and fewer smart phones have removable batteries? A Li-ion battery is the primary and maybe the only thing that wears out. It can only take a finite number of chargers and that number is not very large. Between 1000 and 1500. And the capacity doesn't just walk off the cliff when you get to charge #1500, it gradually declines.  So a 6 month old iPhone with 200-300 charges on it just does not have the mAh capacity of a new one.

They had several flagship phones where you could easily remove the battery and install a new one without replacing the entire device. 30 minute charging? F-that, it's 20 seconds for me. As easy as removing the back cover and installing a new one.

samsung just released Galaxy Note 8, a fine device but sealed, tiny battery. LG released V30, another fine phablet but again, smallish sealed Li-ion battery, a deal breaker.

Designed to last about a year.

Just f-them. I am currently running Samsung Galaxy  Note 4 which is of 2014 vintage. Will upgrade to LG V20 which is 2016 vintage and keep the same model until they run out of it. No shortage of it on Ebay.



Zerolemon.com




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Discussions - Public / Re: Buying hardware one generation behind
« on: October 31, 2017, 04:36:35 AM »
I think my numbers are off then. If iphone 7 is 769, then what does 8 and X sell for.

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