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A computer monitor, also known as computer screen, is a peripheral computer device that shows moving or still images that have been generated by the computer and processed by the graphics card in the computer. There are several display standards in the monitor that define how the images are viewed on the computer monitor.
Let’s have a look at computer monitors.
There are two specific types of computer monitors; CRT and LCD. LCD (Liquid Crystal Display) monitors are energy efficient computer monitors that come with a variety of benefits.
An LCD monitor, in general, is compact, thin and lightweight. The way an LCD monitor works is comparable to how a digital watch works. It contains transistors that charge liquidized crystals that are located between two plates of glass. Fluorescent tubes provide the source of light and this passes through one layer of the liquid crystals. Typically, an LCD monitor will have a longer life-span, less heat output, save on space and is energy efficient.
A CRT (cathode-ray tube) monitor is still the most common type of computer monitor. They have been used for many years, but more people are opting for the less bulky and lighter LCD Monitor.
A CRT monitor works the same way as your household television. It is usually very bulky and heavy. The cathode in the monitor works by shooting an electronic beam through the vacuum tube that is also located in the monitor. The vacuum tube sends out phosphors that create the glow seen on the monitor screen.
Questions to ask before buying a new monitor.
When shopping for a new computer monitor, you should ask the sales person a few questions prior to handing over your hard-earned money.
First, ask yourself how you intend to use the monitor. Will it be for gaming? Work? This will help you determine the size and capabilities of the monitor you need to purchase.
Next, determine where the monitor will be located. Will it be on a desk that sits flush with the wall? Or is the desk in the middle of the room? Is the desk small or large? This will help you determine the size of the monitor and whether you need a CRT monitor or an LCD monitor. Remember a CRT monitor is large and bulky while the LCD monitor is perfect for small areas.
What kind of resolution and display size is needed? When the sales person tells you the display size of an LCD screen, it will be the exact size he says. With a CRT monitor, you can expect the display size to be about an inch smaller.
If price is a factor, then the CRT monitor will work well for you. It is generally 2-3 times less expensive then an LCD monitor but will provide you with less display area.
Last, determine exactly what size monitor you need based on what you intend to use it for. Computer monitors come in a variety of sizes and it will be a matter of what you want, need and can afford.
Happy Computing!
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Our LED tube is one typical example of those enviormental-protection products. No mercury which makes LED has great advantage than other light source. Owing to the great development of LED technology, now we are more capable to develop LED application products, which can replace many traditional lighting, such as fluorescent lamp, incandescent bulb, halogen lamp, etc. Our LED tube 20W/ 18W/9W can replace T8 fluorescent lamp 58W/36W/18W. The light efficiency can arrive at 100LM/W. Because LED has beam angle, LED tube can make sure that all the light is used effciently on the ground, no waste to up face.
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So now its time to roll up our sleeves and get to work. There are some very important guidelines to follow when doing electrical work:
-MAKE SURE THE POWER IS OFF AND THERE IS NO CHANCE OF IT ACCIDENTALLY BEING TURNED ON WHILE WORKING ON IT.
-Have all the materials you will need for your project. There is nothing worse than being half way in your project to find out you don’t have everything you need.
-Have the right tool for the job your doing
Following our safety guide we need to turn the power off to the light. You can just turn the switch off to the light and that will remove power, but we need to make sure nobody will accidentally turn it on when your working on it. So find your fuse box or circuit panel and shut the breaker off as well. Look for breaker tags such as gen lighting, or lighting.
Now that we know we are safe to work on the fluorescent light here are the tools you will need:
-A fiberglass ladder (make sure it is fiberglass when working with electricity because fiberglass does not conduct electricity.)
-Lineman pliers
-Nut driver
-Wire strippers
-Voltage tester
Now that we have our tools we need to rule out some simple fixes. I have been on calls that I felt so bad charging a customer for something they easily could have done themselves. Number one thing to do is replace the bulb. Keep in mind there are two types most commonly found and they are T-12 and T-8. The T-12 is a fat tube and a T-8 is thin in circumference, that’s the easiest way to figure out what it is. If your still not sure remove the bulb and look at the end of the tube and there will be a model number on it with either T-12 of T-8 in or around that area.
Ok, so we changed the bulb and it’s not the fix. The problem most likely lies in the ballast. By removing the center cover we can access the ballast, you should see wire colors of black, red, blue, yellow, white and green. Before you remove anything you need to make sure you have the right type of ballast. Make sure the model numbers are the same and the type of ballast is the same. All newer fixtures use electronic ballasts, while older models might use rapid start, and magnetic type ballasts as some examples. We know we have the right ballast so what I do before I even remove the ballast is take the black and white wire from the ceiling box and remove it from the ballast without touching the bare copper and test them with your voltage tester to make absolute sure they are dead,cap each one with a wire nut, these wires are what give power to the ballast.
Look at the colors and where there connected to. I then cut the wires with my linesmans pliers after the wire nut. I do this because when you put the new ballast in it will have the same colored leads as the old one, so you can use it to help you reconnect the colors of wires to the light. After you cut the wires remove the ballast with your nut driver making sure not to lose that nut you will need it later!!! CAUTION: The ballast may be hot to the touch, put some gloves on or use a rag when handling the ballast. Install the new ballast by aligning it into the slots and the hole where the nut was. Simply fasten the nut down and the ballast should now be secured to the fixture. Now connect blue to blue, red to red, yellow to yellow using orange wire nuts. Next hook up the black wire being careful because this is your “HOT” wire to the black and the white to the white. One thing you need to do when connecting the wires is to make sure that you twist your wires together, do not just rely on the wire nut. If you do not twist your wires it could cause a fire by not having a good connection.
Place the cover back on the fixture, put some new lamps in and your done.
Turn the breaker back on at the panel, turn the switch on and let there be light. Now the bragging starts.
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If you do a lot of boondocking (no hookups while camping), then you know battery life is one of the most important things you must plan for, especially if you have a small battery bank. One great way to save a lot of power is to convert your existing incandescent lighting to LED lighting. LED stands for light emitting diode and provides light in a very different way than incandescent or fluorescent lighting sources. The biggest benefit for a boondocker is that LEDs require very little power to operate, so you won’t have to be so conscious of switching off lights when you don’t need them.
Just how much power can you save by going LED? In a typical travel trailer of say 27 feet with a super slide and a couple of bunk beds, you may have upwards of 20+ 12 watt incandescent bulbs. If you were to have all of these on at one time, you would be drawing around 20 amps of DC power. In a few hours, your single group 24 12-volt battery would be near dead. Even if you had two batteries, you wouldn’t have much left to finish out a 2-day weekend without a battery recharge.
Now if you were to replace every interior incandescent bulb in this fictitious travel trailer with a 24 LED array warm color lamp, each drawing 190 mA, the total power consumption drops to 3.8 amps, over 5 times less power consumption. You wouldn’t likely replace every incandescent bulb with a 24 LED array lamp but you could and if you did, you would be using 5 times less power, even if you had every light switched on.
There are several different routes you can take when doing the LED lighting mod: individual lights, such as a night or reading light, all or some interior lights, interior and exterior, storage compartments, etc. Much will depend on you budget and coolness factor you are trying to achieve. Replacing every incandescent bulb may just break your piggy bank, but doing a few can still help save some battery power.
Using a single LED for a night light, like in the bathroom, can be a real life saver. Well, it may not save your life but if you have to get up at 2am to go, you won’t be blinded by the light and you should be able to go right back to sleep. A single LED connected through a SPST toggle switch mounted on the bathroom light fixture can provide just enough light to do your business.
Perhaps you just want to change a few lights out, like the lights over your bed, that are generally too bright to read by. There are direct replacement LED lamps that require no modification to the lighting fixture, other than swapping bulbs. For this type of LED lamp, use the “warm white” type. The cool white LEDs provide a bluish tint to the light color and may not appeal to your reading tastes. The warm white LEDs provide a yellowish light color very similar to that of a normal incandescent bulb.
If you plan on replacing the main lights inside the RV and have the type of fixtures that contain two bulbs with a switch in the middle, you can replace just one of the bulbs to reduce cost. This way you not only save money, but you also can still provide more light when you need it by switching on the second bulb. For this case, you should consider LEDs that have a wide beam angle, at least 120 degrees. This is the angle at which light is projected from the lamp. The wider the better if you’re trying to light up a large area. These lamps are typically configured in a flat package with many LEDs, as many as 36 in some cases. They simply affix to the fixture with Velcro and plug in just like a standard bulb.
Another cool LED mod is to fit a LED rope light under your RVs countertop. Many upscale RVs have this feature as a standard option but there is no reason you can’t have this classy look either. First, have someone help you test fit the rope for length, ensuring you have enough for the whole countertop. Then get some double-sided tape and stick it to the cabinet or under the countertop where you want the rope to run. If you have any left over rope, drill a hole the size of the rope’s diameter and run the excess through the hole. Just stick the rope to the tape and press firmly. You can also add a switch to control the rope power as well.
A step light is also another easy LED mod that consumes very little power. If you forget to turn it off, you don’t have to worry since it can be on for days and still be easy on your battery. You can use a courtesy light or an amber side marker light. These mount with a couple of screws to the underside of the stairwell. Power can be run to an inconspicuous switch inside. Some even have light sensors so they can automatically turn on when it gets dark and turn off in the morning.
Outside compartments are also a great candidate for LED lights. These can be powered through a pin switch so that when you open the compartment door, the light turns on, and then off when you close the door. The color of the LED light is not so important as is the placement of the light. Compartments are usually rectangular in shape, so try and place the LEDs near the corners of the compartment. This way, you will get the most light to all parts of the storage area.
Finally, upgrading your RVs exterior lighting can make for a very clean look as well as improve safety going to the road. LED porch, marker, clearance, backup, turn, and running lights are all candidates for LED replacement. Fortunately for you, many companies, like Bargman for example, now make direct replacement fixtures that include everything you need to perform the upgrade. Just be sure to budget enough since total exterior lighting replacement can run in to the hundreds of dollars.
Tip: LED brake/tail lamps may not work with some older thermal flasher units found on some vehicles. An LED brake/tail lamp will require an electronic flasher/blinker unit which is commonly available at your local auto parts store. Just ask for the electronic equivalent of your thermal flasher.
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