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Archive for the ‘Power Supply’ Category

Power Supply A Good Ac To Dc Converter

07 Aug

There are two types of currents one is the alternating current and the other is the direct current. The alternating current can be abbreviated as AC and direct current as DC. All types of electrical appliances cannot be handled with alternating current. Hence conversion of it from alternating current to direct current is very essential. The AC to DC convertors which can also be called as a power supplier is used for converting the alternating current into direct current. But how to wire an AC to DC convertor?

But these convertors can be used only when you are in need of power in DC like components of a car audio system and other parts of it. A standard household power is required for it to access the DC output power. Wiring of this AC to DC converter consists of several steps which are simple in carrying out. Few initial preparatory steps and simple wiring connection can give a good AC to DC converter. A proper wiring can ensure the perfect functioning of this converter. The reason for doing this is to get a stable DC output.

A few required tools for performing this operation includes crimping tool, wire strippers to remove excess wire and ring terminal. With the help of these tools the required man power can be reduced to a greater extent. By turning the thumb screws and wing nuts of the power terminals of the DC converter to left, they can be loosened and thus removed.

Half inch of insulation must be removed from the DC’s positive as well as the negative terminals. This is then connected securely to the AC to DC converter. The positive wire will be red in color where as the negative wires are made of black colors. This color difference is used to distinguish among them easily. Though it is not true in some cases. To avoid confusion causing problems one can always refer to the manual given to the user by the manufacturer. The wiring diagram can also be used for ensuring proper wiring.

The next step involves the usage of ring terminals. A ring terminal is slid off onto each wire’s bare ends.

Next we can make use of the crimping tool. It is used for crimping the wire to the terminal. Improper crimping may lead to many defects so ensure the connection before switching on the AC power supply.

There are two separate portals for the connection of positive and negative wires from the ends of the DC device. The positive end of the wire is fastened to the positive terminal of the AC to DC converter where as the negative end of the wire is connected to the negative terminal of the AC to DC converter. Using thumb screws and the wing nuts the terminals are connected to the wires in a proper way.

The last step is very simple it is just connection of the converter into the wall outlet. Switch on the converter and you can get the required power for your system.

The question how to wire an AC to DC convertor in a very simple way by performing the above steps.

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Electricity Is Dirty! Always Use An Uninterruptible Power Supply (UPS)

05 Aug

Electricity from the outlet is dirty! Ideally, the electricity would come out of the wall at an exact voltage and an exact frequency. Technically it is possible to have clean power out of an outlet, but financially, most consumers (homes and businesses) just don’t want to pay that price, so power companies will not provide it. They don’t have to; vacuum cleaners, fans, air conditioners, TVs, printers and light bulbs work just fine with that dirty electricity. Computers, on the other hand, are much more finicky about their electricity needs. Some of the spikes or brownouts are just a tad too much. When that happens, the computer starts misbehaving: 1. it goes to sleep, 2. it shuts off instantly, 3. it corrupts a file or two, 4. it goes into hibernate, 5. it burns out an electronic component. The consequences may be noticeable right away or appear at a later date; the consequences are never good.

At home or at work, a computer should always be on a UPS. Laptops have their own “UPS” and are excluded from this requirement; they have a battery built in.

A UPS is a battery pack that constantly monitors the electricity from the outlet. When the electricity from the outlet exceeds preset thresholds, such as too little power or too much power, the UPS kicks in and takes over.

Now, a surge protector is not the same thing as a UPS. A surge protector only protects from too high of a power from the outlet, such as surges or spikes. A UPS protects from too little power and too much power. This is important for a computer. A computer needs relatively clean power to function properly.

The return on investment, ROI, for a UPS is good. Just consider the hassle and price of corrupted files and you will realize that every computer must have a UPS and every server an even bigger one.

Since every computer has a different power consumption, it is hard to say which UPS is the right one for your computer or server. Typically you will find 300 to 700 Volt Ampere UPSs in the store. They have 300VA or something like that written on the box. It doesn’t matter which one you buy. The 700 VA UPS will last at least twice as long as the 300 VA UPS if the power fails. This could mean that your computer may keep running for 20 minutes rather than 10 minutes. Just realize that these UPSs you buy at the store are the cheap stuff; they are so-called standby-UPSs. If the power from the outlet becomes too dirty, a little switch will switch over to battery power. Some computer power supplies or motherboards can’t even handle the 5 milliseconds of no power when the switch activates. For people with such finicky computers it is better to go to the website of the UPS manufacturer and look for a so-called continuous UPS. These UPSs are more expensive, but the computer is always feeding from the battery and the outlet is just constantly recharging the battery.

Server rooms and any high availability hardware should always run off a continuous UPS.

Oh, never plug a laser printer into a UPS. The fuser, a component that fuses the toner onto the paper, needs so much power at once that it overburdens a UPS. Always plug a laser printer directly into the outlet of the wall.

Frank Mesmer is the Co-Founder and Chief Technical Officer of Sullmer & Associates. Beaverton and Hillsboro, Oregon companies have relied on Sullmer & Associates to provide exceptional computer and networking IT assistance and consulting services since 1999. For more information go to Sullmer & Associates. This article sponsored by NetBiz.

 
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Dell Inspiron 8600 Ac Adapter Power Supply Replacing Guide

03 Aug

hat is far from being true, not long ago, I worked in a computer repair shop, and we frequently worked on dells that had less than standard Dell Inspiron 8600 AC Adapter, we would do exactly this on the ones that the PSU’s died in, and we NEVER had a board fry due to a standard Dell AC Adapter power supply. now, on the super compact systems, we would usually need to use a mini power supply, but still, no problems other than they were weak, and on occasion would shut the system down if you had both the DVD drives and the hard disk spin up simultaneously. On some HP’s, the Dell Inspiron 8600 AC Adapter have a fan connector that MUST be attatched to the board on a certain set of pins, or it will not boot.

So i picked up this Dell AC Adapter and found that it did not fit my stupid dell box so i ended up doing the following. The problem was i got one with 2 connectors not one. but even then it would not of fitted.

step 1 Size up pace for Dell Inspiron 8600 AC Adapter.
So just hold it up to space where to put it and see what needs to be cut out.

step 2 So cut out this section and away we go

step 3 And more cutting…
and keep on measuring up and cutting and finally we get a hole that is as follows. and as a suggestion from TheScientist and a very good suggestion should take a file to edges so do not get cut.

Be careful with cheap high wattage Dell Inspiron 8600 AC Adapter power supplies. They’re not well made and use cheap components. Those things can not only die prematurely, they can take out other computer components.

Dell Inspiron 8600 AC Adapter Description:
Input: AC100-240V (worldwide use)
Output: DC19.5V 4.62A
Power: 90W
Outlet: 3-prong
Connecter size: 
    Internal Diameter: 5.0mm
    External Diameter: 7.4mm
    With pin inside
Item Includes: AC Adapter and Power Cord
Performance: Short Circuit Protection and Overload Protection
Condition: new
100%OEM compatible, guaranteed to meet or exceed OEM specifications!

Porduct Warranty
12 months warranty
For return of non-defective product within the first 10 days from date of purchase, full refund.
Within the whole product warranty days, unartificial defective product returns are accepted for replacement, and we will afford all shipping fee.

See more on: http://www.papatek.com

http://www.papatek.com ?locates in Santa Clara, is a direct sales office and service center of our replacement IT parts manufacture. We currently supply brand new AC Adapter, Rechargeable Battery, DVDRW Drive, LCD Panel, Laptop Keyboard, Floppy Disk Drive and many others for almost all name brand laptops and printers.

 
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The Right Way To Discharge Capacitor In Switch Mode Power Supplies

01 Aug

Switch mode power supply contain some large filter capacitors that can hold dangerous charges even if the unit has not been used for several days. Typical values of this type of filter capacitor are 220uf 250volt and 330uf 400volt! If you are going to work on the power supply circuits, it’s a good idea to discharge that capacitor first.

There are three ways to discharge the big filter capacitor in a power supply.

1)Discharge it with a screw driver (not recommended).

The reason for not using the screw driver to discharge a capacitor is because

-the printed circuit board or circuitry can be damage due to the spark generated while discharging the high voltage capacitor.
I once blowed the power section using this method. However, if you know that the capacitor stored voltage is not too large, you can easily discharge it with a small screw driver.

-if the capacitor holds a heavier charge of electricity. Discharging the capacitor may melt the tip of the screw driver and the copper on the printed circuit board.

-Sometimes a heavier spark may cause small disintegrated solder lead or copper to fly out from the circuit board and may injured your eyes.

2)Place the leads of a socketed 100 watt electric bulb on the leads of the capacitor.

This method had been used by many technicians around the world for the light bulb will act as an indicator to see if the capacitor still holds the charge. If there is a charge the light bulb will light and after discharged the light bulb will goes off.

3)Place the leads of a high wattage resistor on the leads of the capacitor.
I use a 2.2k ohm 10 watt resistor to discharge the high voltage capacitor in a switch mode power supplies. It is simple to use and very effective .It takes only couple of
seconds to fully discharge the capacitor.

Conclusion

I strongly suggest for those who use screw driver to discharge a capacitor to swift to the second and third method as these is the safest method to protect the circuit and most importantly is yourself.

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