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Battery Charging Post
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When sailing around the world, a wind generator is an absolute necessity. Sailboats today are filled with sophisticated and energy-hungry technology, necessary for a safe and comfortable cruise. Here are some of the factors to consider when choosing a marine wind generator.
Installation: The installation should be easy and should allow you a variety of the places for installation. The some common installation points are the mizzen mast or stern post.
Brain: Many marine wind generators include microprocessor-based controllers that result in better operation, enhanced battery charging ability, more reliability and the lessening of flutter noise from the blades.
The controller allows for tracking of the most advantageous use of the wind by effectively delivers the power to the battery. The generator's brain actually allows it to monitor and manipulate blade rotation speed. This gets rid of the buzzing noise frequently found with small wind generators.
Output: The marine wind generator of your choice should start producing power at low MPH, around 5 MPH. It should increase incrementally from there. While it should produce power at low speeds, it should also control the blades in gale force winds. In high winds, the turbine should control the blades, allowing them to turn slowly and generate small amounts of power until the storm is over.
Noise: A common complaint with marine wind generators, indeed wind generators of all types, is the noise. In high winds, the blades can cause a loud flutter noise. Again, the brain of your turbine should control the blades in high winds only allow them to spin slowly, to protect you and the machine.
The design of the blades is also a factor in terms of noise. An aero-elastic blade design will minimize sound pollution as well as protecting the turbine in gale force winds.
Size: The size of marine wind generator you choose depends on the size of your boat. A common size for turbine blades is 36" in diameter. This size will be unlikely to overpower the area of your boat in which it is mounted, cause less windage and have less weight aloft.
Reliability: Your choice of marine wind turbines should feature marine grade materials and stainless steel fittings. The generator windings should be completely sealed. The blades should be built to withstand speeds up to many times the turbine's maximum rpm.
Battery Charging: The key to long battery life is not draining or over-charging the battery. The charge controller on your choice of marine wind turbines should read the battery voltage, compare it to the voltage setting, and completely shut off all current going to the battery if it is fully charged. When the battery has dropped below its voltage set point will the turbine startup and resume charging.
Jeff Fisher is a renewable energy enthusiast. You'll finds tons of helpful green energy information at http://renewableenergysimplified.com/.
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Toshiba Satellite A75 Power Jack And Toshiba Laptop Battery Charge Problem
Toshiba Satellite A75 power jack and toshiba laptop battery charge problem
A bad connection between DC-IN power jack on the system board and the system board is a very common problem with Toshiba Satellite A75/A70 notebooks. If your laptop is out of warranty, then you can fix the problem by resoldering DC-IN jack on the system board. If it’s still under warranty, it would be fixed at no charge to you.
Problem symptoms:
1. Laptop randomly shuts down without any warning.
2. Power LED and toshiba laptop battery charge LED start flickering when you wiggle the power cord or the toshiba AC adapter tip on the back or your laptop.
3. The battery will not get charged.
4. When you plug AC adapter, the laptop appears to be dead and there is no LED activity at all (DC-IN jack on the system board is broken).
To fix the problem, you have to take your laptop apart, remove the system board to resoleder or replace the DC-IN jack. Toshiba Satellite A70/A75 disassembly guides will help you to remove the system board. Take a closer look at the power jack on the system board with a magnifying glass. In most cases you get the power problem because of a bad connection between the DC jack and the system board, you’ll see a crack between the DC jack connector and the system board.
Here is an example of Toshiba Satellite A75 power jack. The crack occurs between the DC jack pin and the system board.
Toshiba Satellite A75 DC in jack
Resolder Satellite A75 DC jack on the system board
In some cases the connection is good, but the DC jack is bad itself. You can find a new DC jack for Toshiba Satellite A75 and Toshiba Satellite A70/A75 laptops here. Search for DC jack A75 or DC jack A75.
How to resolder laptop power jack yourself.
UPDATE:
Sometimes, after you replace the jack, you can see that the system board doesn’t get power at all. The toshiba pa3465u-1brs battery will not charge and the power LED will not light when you plug in the PA3468U-1ACA AC adapter. So, here’s a possible explanation.
When a connection between the positive pin and the motherboard breaks (cracks), the power jack gets loose. You can feel it when you plug in the toshiba ac adapter plug. A loose power jack can damage the trace inside the hole in the system board. Take a look at the picture.
Laptop Power Jack
As you see, the positive pin goes through the hole in the system board and you solder it on the top side. Right? What if the trace between the top side and the bottom side is broken somewhere inside the hole? I’ve seen it before a few times. In this case everything looks nice and clean on the top side. When you plug in the PA3469U-1ACA AC adapter, you get normal voltage readings between “+” and “-“ pins on the top side, but the power DOESN’T go to the motherboard at all, because there is no connection between the top and bottom sides. Test with a multimeter if there is a connection between the top and the bottom.
If the trace inside the hole is broken you still can fix it. You can run a wire to connect the top and the bottom sides. Be careful not to short something on the board.
Update:
Here’s another solution to fix the power jack problem, it shows how to relocate the power jack outside the laptop base. Check it out here: Toshiba Satellite A75 failed power jack workaround.
When you repair a loose power jack, it’s a good idea to check the jack on both sides of the motherboard. When you remove the top cover from a Toshiba Satellite A70/A75 laptop you can see only points where the jack is soldered to the motherboard as it shown on the second picture in this post, but you cannot see the jack itself as it shown on the first picture.
Removing the motherboard from Satellite A70/A75 laptop is a good idea because the jack itself might has a broken “+” pin, as it shown on the picture below. If the “+” broke off the base, you’ll have to replace the jack.
About the Author
webmaster of www.cheapbatteryshop.co.uk , DIGGER Trading Company is a family run company specialising in export of all kinds of original and replacement laptop batteries, and some other Consumer Electronics, we retail and wholesale our batteries all over the world depending our high quality products, all our batteries get CE, UL, Rohs and ISO9001/9002 certifications
How can you tell if your car battery is a negative or positive grounded post system?
I am trying to charge a battery in my car with an electrical charger and want to make sure I am hooking it up right. Thanks
Most cars (at least in the US) have the negative side grounded. You can check by following the negative cable and see what it attaches to. Most likely it will bolt to the frame or body of the car, and somewhere on the engine or transmission.
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