Should I Buy a Led 3d Tv?

3D TVs are the next generation tv's and their acceptance is not quiet clear yet in the retail consumer market. Yes you would be able to turn off the 3D feature and make it "2d format" appear on screen for both 3D and non-3D content.

Should I Buy a Led 3d Tv? 1

1. Is it possible to drive led strips using a halogen driver?

Your power supply does not like the LEDs. That's not a surprise. Either

2. Who would win in a war between the Mongols, led by Genghis Khan, and the European army, led by Ramsey Bolton?

In a war? with Ramsay commanding hundreds of thousands of men? I think Ramsay would send his best hunters to find out more about this threat, and order, knowing hes got the greater numbers by a factor of hundreds of thousands, to meet genghis openly to show europe ramsay is to be feared as their supreme king.like genghis, ramsay needs his enemies and allies alike to fear him. but mongols play that game better. they wont use open combat on him, and instead piss him off with hit and run tactics. he will make a mistake, and then die.

Should I Buy a Led 3d Tv? 2

3. What events led to the Vietnam War?

A US would oggedness' by some US Presidents that no Southeast Asia country would fall to communism & the just as determined North Viet Nam government that they would spread to the South. That is simplistic but pretty accurate too

4. What led to you being diagnosed with schizoid personality disorder?

marriage counseling. the diagnosis was informal, but mostly accurate

5. How do you know if a girl has led you on or.....?

Oh, Kiven...women do not keep their distance to protect you emotionally. *shaking my head* If she likes you, she will absolutely be all over trying to make sure you feel the same. If you feel this girl is keeping you at a distance, it's because she is. And You need to decide if it's time to protect yourself emotionally. She's in this for Her best interest. If she's keeping you around but not committing her heart, it's because you are her back-up guy. I would say move on...she already has.

6. wiring multiple led flashlights to single power source [closed]

Let's try and derive a simple answer for you, that can be understood without EE level math. I assume that the torches you are using are White LEDs. If they are White then I would expect a forward voltage of about 3-3.5 V for the devices used. All diodes have a slope in the Vf characteristics such that as the current through them increases, the forward voltage drop increases (in a non-linear fashion) too. You can see from the above graph that at a current of 5 mA for a White LED, Vf is about 3 V and at a current of 27.5 mA it's about 3.5 V. The typical cheap Torch is powered by 3 * 1.5 V batteries, so the voltage available ranges from 4.5 V for fresh batteries to about 3 V for fully discharged batteries (1 V per cell). The brightness of the torch will drop as the batteries discharge. So again an assumption; you may be talking about cheap 24 LED torches such as this: If this is indeed somewhat similar to your torch, then you have the series resistor wrong. It's more likely to be 2.2 Ohms than 22 Ohms. I have a bunch of these type torches and in mine the resistor is 2.6 Ohms.To figure out how much current is flowing in 24 parallel LEDs is a bit of heavy math lifting to be accurate, but we can derive an approximation of the current in a very simple manner using just the graph above. Here is the graph re-done to show the current and Vf for 24 LEDs in parallel. Superimposed on this is the linear slope representing the current/voltage of the 2.2 Ohms limiting resistor I assume is in your torches. The graph depends on a couple of assumptions:From the above graph you can see that when the battery voltage is 4.5 V the current (LEDs and resistor) will be approximately 660 m A, and when the battery voltage is 3.5 V the current will be approximately 240 mA. The power dissipation for a torch is then V * A --> 4.5 * 0.660 = 3 W. So each LED (if they shared the current equally) would be about 27.5 mA. This is about right as a maximum current for these small sized LEDs. With your 30 torches at 3 W each you now also know you need about 90 W of power in total.If you want to run 30 torches in parallel (using say a larger power supply to provide 4.5 V), then you would have current flows of about 0.66 * 30 = 20 A. This could be done, but I consider it impractical (size of cables and voltage drop). Now lets flip over to your garden situation. Most local regulations limit the voltage you can bury or expose to safety levels (typically 35-48 V AC or less). and with the prevalence of LED lighting today there are lots of good power supply options in the 12 V and 24 V DC range. I would suggest a waterproof 24 V DC exterior power supply may be a good starting point for your project. I am not suggesting this particular unit, but it will give you an idea what to search for, Uxcell waterproof LED lighting supply 1.With a suitable 24 VDC power supply rated at 100 W or more (I would recommend you use 150 W) you can run 5 torches in series (with a safety diode to lessen the likelihood you could blow any up with a reverse cable connection) and so have 6 cable runs to get your 30 units in total. Each torch now gets approximately 4.6 V which is right at the top of the range of our graph and shows a current per string of about 670 mA (less than 30 mA per LED, which is still within ratings).If you want the torches to be dimmer you could run 6 torches in series per string (with 5 strings). This would result in approximately 3.8 V per torch and about 370 mA per string (about 16 mA per LED). Note: You do not need to modify the torches at all, you simply connect 5 or 6 of them in series and they all have their own internal limiting resistor still in place. Even though the power supply is short circuit protected, I would suggest you add a 5 A output fuse (you can get inline fuse units) on the 24 VDC side so if you get any shorts in the garden you are protected. I would further add an inline 1-2 A fuse on each of the series of torch strings. So my suggested schematic would look like this:simulate this circuit - Schematic created using CircuitLabWith a maximum current of about 4 A from the power supply and 0.66 A in each torch run you should be able to use any reasonable garden/exterior rated cable of at least 10 A capacity (typically 10-16 AWG equivalent wire). The voltage drop in any particular cable should be kept to the minimum, but is going to be dependent on how many runs you have and the cable size you use. This will obviously be the most expensive part of your project since 1000 ft of cable is rarely cheap. A good place to start for resistance values is this chart. If you use 10 AWG wire (2 mOhm/ft) for the major spine from the power supply and 16 AWG (4 mOhm/ft) for the torch runs it should be possible to minimize the voltage drop to less than 0.5 V end to end.

LED related articles
What Are the Advantages of Solar Led Street Light Compared
We provide you with better light –– GREENEARTH
Bright Idea: New LEDs Can Detect Off Food And Lethal Gases
Gallium Oxide White LED Prospects
Retailers Employing NICHIA LED Technology Are Ahead Of The Game
you might like
Lamp Part Products Strip Lights
Green Earth Brand GE-05050RGB Star Silver Led Strip Manufacters LVD/EMC/RoHS/CE Supplier
GE-05050RGB Flame Red 3 Years Led Strip Rate Green Earth Brand
Yes GE-05050RGB Forest Green Green Earth Brand Led Strip Wholesalers Factory
Green Earth Brand Shenzhen 1000m Yes Shenzhen Car Led Light Strips
Hot GreenEarth Led Strip Manufacter in Dehli LVD/EMC/RoHS/CE Green Earth Brand
Green Earth is continuously approaching different markets in various ways, we will keep on researching and designing innovative products, bring a better light to human beings. 
QUICK LINK
CONTACT US

Market cooperation : Pei Yin

E-mail : greenearthcn@greenearthcn.com

Phone : +86 13823531612

Supplier Cooperation : Zhi Song

E-mail : songzhi@green-earth.cn

Phone : +86 13588306599

ADDRESS
5-7F, Block 1, Industrial Park 29, Makan Village, Xili Town, Nanshan District, Shenzhen,China. 518055
FOLLOW US
   

Copyright © 2021 GREENEARTH  |  Sitemap

chat online
Please message us and we’ll be sure to respond ASAP, what product you intrested in?