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#1
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What is a COB Light?
I keep seeing that word "COB" used for LED flashlights lately.
What do they mean by using the word "COB"? (I remember when COB was part of an ear of corn, and none of them lit up) |
#2
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What is a COB Light?
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#3
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What is a COB Light?
Tekkie® wrote:
posted for all of us... I keep seeing that word "COB" used for LED flashlights lately. What do they mean by using the word "COB"? (I remember when COB was part of an ear of corn, and none of them lit up) Google returns Circuit On Board. You know how to use it? It is an acronym for "Chip on Board" Here is an explanation "Relatively new to the LED market, chip on board (COB) LEDs offer many advantages over the standard options. COB LEDs are basically multiple LED chips (typically nine or more) bonded directly to a substrate by the manufacturer to form a single module. Since the individual LEDs used in a COB are chips and not traditionally packaged, the chips can be mounted such that they take up less space and the highest potential of the LED chips can be obtained. When the COB LED package is energized, it appears more like a lighting panel than multiple individual lights as would be the case when using several SMD LEDs mounted closely together." This will give you even more information. https://www.digikey.com/en/articles/...board-cob-leds |
#4
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What is a COB Light?
On Wed, 10 Jan 2018 15:43:36 -0600, wrote:
I keep seeing that word "COB" used for LED flashlights lately. What do they mean by using the word "COB"? (I remember when COB was part of an ear of corn, and none of them lit up) http://www.cob-led.com/What-is-cob-L...-on-board.html ... anything else you want us to google for you ? John T. |
#6
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What is a COB Light?
I keep seeing that word "COB" used for LED flashlights lately. What do they mean by using the word "COB"? (I remember when COB was part of an ear of corn, and none of them lit up) http://www.cob-led.com/What-is-cob-L...-on-board.html .. anything else you want us to google for you ? John T. Youbetcha. Hows about googling "helpful" "tolerant" "considerate" "courteous"... try dictionary.com You're welcome. John T. |
#7
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What is a COB Light?
On Wed, 10 Jan 2018 14:27:28 -0800, mike wrote:
On 1/10/2018 2:07 PM, wrote: On Wed, 10 Jan 2018 15:43:36 -0600, wrote: I keep seeing that word "COB" used for LED flashlights lately. What do they mean by using the word "COB"? (I remember when COB was part of an ear of corn, and none of them lit up) http://www.cob-led.com/What-is-cob-L...-on-board.html .. anything else you want us to google for you ? John T. Youbetcha. Hows about googling "helpful" "tolerant" "considerate" "courteous"... Sometimes I wish the web did not even exist. The newsgroups were the original internet. Back then, people discussed things without referring to web pages. Not only do I still prefer the newsgroups, but ever since they implemented HTTPS (secure sites), I can not access most websites. It's a long and rather complicated process involved, which I dont care to discuss in detail. I will only say that due to my location, I have very limited access to the internet. The newsgroups work, email works, but the web is extremely limited. Something to the order of 1 out of 30 websites actually load properly. And google does not work at all anymore, nor does Bing. (Yahoo search still works though). In the end, not everyone online is able to use all the high tech gadgets, and high speed internet that they keep forcing upon us, whether we want it or not. 15 years ago, websites were just text and pictures and they were useful. Now we have scripts, and huge executible files and megs of security to protect us from all them scripts and executibles, and worthless bloat, so the actual content is lost in all the garbage. These days, to obtain 1K of useful content requires 5 megs of downloading before the page can load. I do my best to avoid the web anymore, because it's very frustrating and a huge waste of time. |
#8
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What is a COB Light?
ever since they implemented HTTPS (secure sites), I can not access most websites. It's a long and rather complicated process involved, which I dont care to discuss in detail. I will only say that due to my location, I have very limited access to the internet. The newsgroups work, email works, but the web is extremely limited. Something to the order of 1 out of 30 websites actually load properly. And google does not work at all anymore, nor does Bing. (Yahoo search still works though). Yikes ! I thought that I was quite late going from dial-up to high-speed - about 12 years ago - dial-up was becoming futile back then ! And because my first high speed was cellular - very expensive ! - I still needed to carefully watch my usage. One thing that helped greatly - I bought a used laptop and made use of the high speed at the library and coffee shops. - once or twice a week. I would save links and email a list to myself - used a "download helper" to save humourous and music Utube videos and other stuff like big pdf instruction manuals etc. I didn't think that google was ever slow - but all the top hits that the searches returned would be fancy paid-for sites - so I learned to scroll down and look for edu or wiki or less commercial hits. John T. |
#9
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What is a COB Light?
On Thursday, January 11, 2018 at 1:00:47 AM UTC-5, wrote:
And google does not work at all anymore, nor does Bing. (Yahoo search still works though). I haven't tried AltaVista in a long time, but that used to be my go-to. |
#10
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What is a COB Light?
And google does not work at all anymore, nor does Bing. (Yahoo search still works though). I haven't tried AltaVista in a long time, but that used to be my go-to. a quick google search for the wiki info : AltaVista was a Web search engine established in 1995. It became one of the most-used early search engines, but lost ground to Google and was purchased by Yahoo! in 2003, which retained the brand, but based all AltaVista searches on its own search engine. On July 8, 2013, the service was shut down by Yahoo! and since then, the domain has redirected to Yahoo!'s own search site.[2] |
#11
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What is a COB Light?
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#12
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What is a COB Light?
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#13
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What is a COB Light?
On 01/11/2018 09:29 AM, wrote:
[snip] But connecting with Windows 98, works fairly good, but limits browsers to Firefox 3.x. (which of course cant handle HTML5 or most HTTPS, and gives constant script errors). You get get up to 9.x (maybe higher) with KernelEX . It does support some new features like the fullscreen API. I cant even use a cellphone at my location, NO SERVICE. The only way I could get fast internet would be to spend around $150 per month for a satellite dish, which could require installing a tall pole to mount the dish, at a cost of several thousand to install. I'm retired and on a fixed income. The dish is NOT gonna happen. I have had satellite internet (Starband, around 2001). It was nearly unusable because of the high and variable latency. [snip] -- Mark Lloyd http://notstupid.us/ "Life can be beautiful, profound, and awe-inspiring, even without an irate god threatening us with eternal torment." Judith Hayes, In God We Trust: But Which One? (Madison, WI: FFRF, 1997), p. |
#14
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What is a COB Light?
On Thu, 11 Jan 2018 16:33:56 -0600, Mark Lloyd wrote:
On 01/11/2018 09:29 AM, wrote: [snip] But connecting with Windows 98, works fairly good, but limits browsers to Firefox 3.x. (which of course cant handle HTML5 or most HTTPS, and gives constant script errors). You get get up to 9.x (maybe higher) with KernelEX . It does support some new features like the fullscreen API. I cant even use a cellphone at my location, NO SERVICE. The only way I could get fast internet would be to spend around $150 per month for a satellite dish, which could require installing a tall pole to mount the dish, at a cost of several thousand to install. I'm retired and on a fixed income. The dish is NOT gonna happen. I have had satellite internet (Starband, around 2001). It was nearly unusable because of the high and variable latency. [snip] I have kernel-ex installed. It is helpful with some stuff, but not browsers. I have tried numerous versions of FF beyond 3.x, and they are very unstable, or dont work at all. By default, FF 2.x was the limit without kernel-ex. With it, FF 3.x works, but nothing higher. Some of them load, but not properly in all cases. Lots of crashes and errors. Then again, I doubt any of those old versions of FF would work well today with all the security issues and HTML5. Even my laptop that I use at WIFI spots (with XP), began acting flakey recently because I was using FF 18.x. I finally had to upgrade that to a newer version, which works but runs sluggishly because it's so bloated and that laptop is an older and slower computer. (And I'm still not using the newest version of FF on that laptop). I keep asking when this will all end? Why is all this bloat and complex junk needed, just to read some text and see some pictures? What ever happened to the old web that was useful? I suspect they are doing this to force everyone to keep buying new computers and operating systems. In all honesty, I can use my old Win98 computer to do anything I can do on any newer computer, and it does it well. I can watch videos and everything. Win98 had some limitations with USB support though. What really bugs me is that I cant even read a Wikipedia site anymore because of the security crap. Why is all this security needed, just to read a simple page of text and some pictures? The answer to that is IT'S NOT NEEDED. It's only needed because of all the scripts and CSS junk that's being used these days. The internet was much more secure before they began adding all that junk. And before they allowed Facebook and Google to track everyone online. We need to go backwards if the web is going to continue being useful, but I dont see that happening, because Google, Facebook, and some others would lose money..... |
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