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Dell Computer & Laptop Repair services in Dubai

Call us at 0557503724 for Dell Laptop Repair in Dubai

Dell is a multinational brand of laptop & the desktop computer on the market. Dell is an international product Maker Company related to Computer & Laptop. Large number of users of Dell Laptop & desktop Computer available in Dubai, UAE. Dell laptop is doing work very smoothly. If you looking any kind of hardware issues like heating problem, screen damage and crack, Disk issues, Keyboard keys work not properly any kind of issues. You need to repair laptop and replace the screen of the laptop. No problem! Call us @ 0557503724 for solving any kind of issues related to your device. We have teams of professional technician for your Dell Laptop Repair services provided in Dubai. We are using only Dell Genuine Parts to repair Dell Laptop and Computer.

Dell Laptop MotherBoard Replacement services in Dubai, UAE

If you are facing issues with your laptop, switch on, Dell laptop heating issues, Keyboard keys are not working properly, adapter issues, hard disk related issues and any other problem with your laptop and desktop computer. Contact us to gating solution of your all issues at our single platform related to your laptop and desktop. Our Dell technician expert team has ten years experience to provide services for laptop repair services in Dubai at anywhere and anytime.

The Dell Laptop related services in Dubai, which is provided by us. Such that like: –

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Compaq Laptop Repair in Dubai, UAE

Call us at 0557503724 for Compaq Laptop Repair in Dubai

Compaq is a multinational brand which is very usable in Dubai, UAE.  Compaq has made Computers, Laptops which are available at international market. Are you looking any kind of issues when using your Compaq laptop and desktop computer then you need to repair your computer? Contact us @ 0557503724 for our Compaq Laptop Repair services which are provided by our Compaq devices repair expert technician team. If you want to take better and better repair services in Dubai at anytime and anyplace. No problem! Contact us to gating Compaq laptop repair services at any time in Dubai, UAE.

Compaq Laptop Hard Disk Replacement in Dubai, UAE

Are you having any issues with your laptop & Computer hard disk? You are looking any message on screen, like please insert any desk or memory than you need to replace your computer and laptop hard disk? Our Compaq Laptop Hard Disk Replacement team provides you the best solution for your laptop or computer hard disk replacement. We are providing you services on your doorstep and your office where you composed for repairing your laptop. Our Compaq technician used only Compaq genuine parts for replacing or repairing any part of laptop and desktop computer.

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Contact us @ 0557503724 for resolve Compaq Laptop Hard Disk Replacement  issues at your home and office in Dubai, UAE.

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  • 24*7*365 hours services.
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Asus Repair in Dubai

Asus Computer & Laptop repair services in Dubai. Call us @ 0557503724

Asus is a multinational brand of laptop, computer, graphic cards, monitors, hardware, motherboards, and tablets and many more. Asus LCD screen is damaged & crack than you need for replacement of Asus computer and Laptop. Our professional and certified technician for repair & replacement of Asus devices accessories.

If you have any hardware problem with your Asus Computer and Laptop then you need for repair Asus Devices like Computer, Laptop etc. Do not waste time contact with us a better solution for your Asus Device. We have a special team for Asus repair in Dubai. Our technician used only Asus part for repairing your Asus device.

Our Asus repair Service Best Repairs for:

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The service technician will be carefully solved your broken hinge and replace it with the Asus part for your Asus Laptop and computer.

For the best services by our certified technician to any issues of ASUS repair in Dubai Call us @ 0557503724.

iMac repair services in dubai

iMac Repair Services in Dubai Call Us @ 0557503724

Apple Inc. is an American multinational technology company headquartered in Cupertino, California that designs, develops, and sells consumer electronics, computer software, and online services.

Apple revolutionized personal technology with the introduction of the Macintosh in 1984. Today, Apple leads the world in innovation with iPhone, iPad, iMac. IMac devices are an elegant, sleek and a beautiful compact designed device that offers an ultimate desktop experience provide seamless experiences across all Apple devices. IMac is the idea that draws people towards it and as it said no one can predict the possibility of  iMac issues, people went through a lot of trouble/issue at that time when there is no repair services around them. So, here we come in light with 24*7 iMac repair services to resolve your issues through the onsite support.

We are here to listen to your problems and resolve it as soon as possible with 100% satisfaction. Our onsite professionals and technician working 24*7 to provide onsite support and then apply methods for fixing it. We believe customer is the key to success and our area of expertise can make us achieve that. We do understand the value of your time and money so we are here to provide you with the best solution/support. And we believe in instant solution on time.

  • SETUP and Installation of MAC
  • Resolving Blue Screens and Booting Errors
  • Configuration Settings Issues
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4, 5 and 6 Band Resistor Color Code Calculator

Resistor Color Code calculator – calculate corresponding value of a given resistor color marking

To use the resistor color code calculator click on the dropdown box starting from the left and select the corresponding color, black on the first marking is disabled by default. For the 4 band resistor calculator the third band is the multiplier and the fourth is the resistor tolerance. For the 5 band resistor calculator the 4th marking is the multiplier while the 5th marking is the tolerance, for 6 band resistor calculator the 4th marking is the multiplier, the 5th is the tolerance and the six marking is the temperature coefficient. For additional information on reading resistor color coding check out how to read resistor color code on this site. For the output value check out standard EIA Resistor value and standard value resistors.

Note:This Resistor Color Code Calculator requires that your browser JavaScript be enabled, if your browser Javascript is disabled this Resistor Color Code Calculator will not work.

4 BAND RESISTOR COLOR CODE AND TOLERANCE CALCULATOR

 

6 BAND RESISTOR COLOR CODE AND TOLERANCE CALCULATOR

The 6th band marking is the Temperature Coefficient in ppm/degreeC of a resistor which represent the amount of resistance value that will change with temperature

 

Standard Resistors Value

Table shows a list of Standard Resistor Value in plus or minus (0.5%) tolerance, (10%) tolerance, (20%) tolerance and (20%) tolerance

Standard Resistor Value (±0.5%) tolerance
Ω Ω Ω
             
1.0 10 100 1.0 10 100 1.0
1.1 11 110 1.1 11 110 1.1
1.2 12 120 1.2 12 120 1.2
1.3 13 130 1.3 13 130 1.3
1.5 15 150 1.5 15 150 1.5
1.6 16 160 1.6 16 160 1.6
1.8 18 180 1.8 18 180 1.8
2.0 20 200 2.0 20 200 2.0
2.2 22 220 2.2 22 220 2.2
2.4 24 240 2.4 24 240 2.4
2.7 27 270 2.7 27 270 2.7
3.0 30 300 3.0 30 300 3.0
3.3 33 330 3.3 33 330 3.3
3.6 36 360 3.6 36 360 3.6
3.9 39 390 3.9 39 390 3.9
4.3 43 430 4.3 43 430 4.3
4.7 47 470 4.7 47 470 4.7
5.1 51 510 5.1 51 510 5.1
5.6 56 560 5.6 56 560 5.6
6.2 62 620 6.2 62 620 6.2
6.8 68 680 6.8 68 680 6.8
7.5 75 750 7.5 75 750 7.5
8.2 82 820 8.2 82 820 8.2
9.1 91 910 9.1 91 910 9.1

 

Standard Resistor Value (±10%) tolerance
Ω Ω
10 100 1 10 100
12 120 1.2 12 120
15 150 1.5 15 150
18 180 1.8 18 180
22 220 2.2 22 220
27 270 2.7 27 270
33 330 3.3 33 330
39 390 3.9 39 390
47 470 4.7 47 470
56 560 5.6 56 560
68 680 6.8 68 680
82 820 8.2 82 820
Standard Resistor Value (±20%) tolerance
Ω Ω
10 100 1 10 100
15 150 1.5 15 150
22 220 2.2 22 220
33 330 3.3 33 330
47 470 4.7 47 470
68 680 6.8 68 680
Standard Resistor Value (±20%) tolerance
Ω Ω
10 100 1 10 100
15 150 1.5 15 150
22 220 2.2 22 220
33 330 3.3 33 330
47 470 4.7 47 470
68 680 6.8 68 680

How To Read Resistor Color Coding

4 band resistor color code calculator5 band resistor color coding

Because carbon resistors are small physically, they are color-coded to indicate their resistance value in ohms(Ω).  The basis of this system is the use of colors for numerical values as listed in table 1-1 and 1-2.

In memorizing this colors, remember that the dark color, black and brown correspond to the lowest number, zero and one through lighter colors, to white for nine.  The color coding is standardized by the Electronics Industries Association (EIA).

RESISTANCE COLOR BANDS.

This code is the most common system used for color coding insulated carbon resistors having axial leads, as shown above.  Color band are printed at one end of the insulating body.  Reading from left to right, the first color band close to the edge indicate the first digit in the numerical value of the resistance.  The second band is the second digit.  The Third band is the decimal multiplier giving the number of zero after the two digits.  The resulting number is the resistance in ohms.

As an example as shown in the table the first stripe is Brown for 1, the second stripe is Black for 0 the Green multiplier mean add five zeroes to 10 therefore this resistance value is 10 x 105 or 1,000,000 Ω or equivalent to 1MΩ

If the thirds stripe is black means “do not add any zero to first two figures so if the color is Brown, Black and Black stripes the resistance value would be 10Ω.

Resistors under 10 Ω have third stripe of gold or silver which are fractional decimal multiplier for instance if the stripes of the resistor are yellow, violet and gold multiply the first two digit by 0.1 and if the third stripe is silver multiply by 0.01, so for instance if the stripe of the resistor are yellow, violet and gold the resistance would be 47 X 0.1 or 4.7Ω if the third stripe is silver the resistance would be 47 X 0.01 or 0.47Ω.

Gold and silver are fractional multipliers only in the third stripe.  However gold and silver are most often used as fourth stripe to indicate how accurate the resistance value is.

RESISTOR TOLERANCE.

The amount by which the actual resistance can be different from the color coded value is the tolerance, usually given in percent.  For instance, a 100,000Ω or 100KΩ resistor with ±10 percent tolerance can have a resistance 10 percent above or below its indicated resistance so when check from multi-meter the reading could range from 90,000Ω up to 110,000Ω value.  The inexact value of carbon-resistors is a disadvantage resulting from their economical construction, but in most circuits 5 to 10 percent variation in resistance can be tolerated.

 

 

Standard EIA Resistor Value

Table of Standard EIA Resistor Value
(Electronic Industries Association)
E6 (±20%) E12 (±10%) E24 (±5%) E48 (±2%) E96 (±1%) E192 (±0.5) E6 (±20%) E12 (±10% E24 (±5%) E48 (±2%) E96 (±1%) E192 (±0.5)
100 100 100 100 100 100 100 120 130 147 147 147
101 149
102 102 150 150 150 150 150
104 152
105 105 105 154 154 154
106 156
107 107 158 158
109 160 160
110 110 110 110 162 162 162
111 164
113 113 165 165
114 167
115 115 115 169 169 169
117 172
118 118 174 174
120 120 120 176
121 121 121 178 178 178
123 180 180 180
124 124 182 182
126 184
127 127 127 187 187 187
129 189
130 130 130 191 191
132 193
133 133 133 196 196 196
135 198
137 137 200 200 200
138 203
140 140 140 205 205 205
142 208
143 143 210 210
145 213
150 180 200 215 215 215 220 270 300 316 316 316
218 320
220 220 220 221 221 324 324
223 328
226 226 226 330 330 330 332 332 332
229 336
232 232 340 340
234 344
237 237 237 348 348 348
240 240 352
243 243 357 357
246 360 361
249 249 249 365 365 365
252 370
255 255 374 374
258 379
261 261 261 383 383 383
264 388
267 267 390 390 392 392
270 270 271 397
274 274 274 402 402 402
277 407
280 280 412 412
284 417
287 287 287 422 422 422
291 427
294 294 430 432 432
298 437
300 301 301 301 442 442 442
305 448
309 309 453 453
312 459
470 390 430 464 464 464 680 680 680 681 681 681
470 470 470 690
475 475 698 698
481 706
487 487 487 715 715 715
493 723
499 499 732 732
505 741
510 511 511 511 750 750 750 750
517 759
523 523 768 768
530 777
536 536 536 787 787 787
542 796
549 549 806 806
556 816
560 560 562 562 562 820 820 825 825 825
569 835
576 576 845 845
583 856
590 590 590 866 866 866
597 876
604 604 887 887
612 898
619 619 619 909 909 909
620 626 910 920
634 634 931 931
642 942
649 649 649 953 953 953
657 965
665 665 976 976
673 998

Standard Wire Gauge

Wire Number British Wire Gauge (SWG) American Wire Gauge (SWG)
Gauge No. Inches Equivalent in mm Inches Equivalent in mm Ohms per 1000 ft. of copper wire at 25C
7/0 0.5000 12.700
6/0 0.4640 11.786 0.5800 14.7320
5/0 0.4320 10.973 0.5165 13.1191
4/0 0.4000 10.160 0.4600 11.6840
3/0 0.3720 9.449 0.4096 10.4049
2/0 0.3480 8.839 0.3648 9.2658
1/0 0.3240 8.230 0.3249 8.2515
1 0.3000 7.620 0.2893 7.3481 0.1264
2 0.2760 7.010 0.2576 6.5437 0.1593
3 0.2520 6.401 0.2294 5.8273 0.2009
4 0.2320 5.893 0.2043 5.1892 0.2533
5 0.2120 5.385 0.1819 4.6203 0.3195
6 0.1920 4.877 0.1620 4.1148 0.4028
7 0.1760 4.470 0.1443 3.6652 0.5080
8 0.1600 4.064 0.1285 3.2639 0.6405
9 0.1440 3.658 0.1144 2.9058 0.8077
10 0.1280 3.251 0.1019 2.5883 1.0180
11 0.1160 2.946 0.0907 2.3038 1.2840
12 0.1040 2.642 0.0808 2.0523 1.6190
13 0.0920 2.337 0.0720 1.8288 2.0420
14 0.0800 2.032 0.0641 1.6281 2.5750
15 0.0720 1.829 0.0571 1.4503 3.2470
16 0.0640 1.626 0.0508 1.2903 4.0940
17 0.0560 1.422 0.0453 1.1506 5.1630
18 0.0480 1.219 0.0403 1.0236 6.5100
19 0.0400 1.016 0.0359 0.9119 8.2100
20 0.0360 0.914 0.0320 0.8128 10.350
21 0.0320 0.813 0.0285 0.7239 13.050
22 0.0280 0.711 0.0253 0.6426 16.460
23 0.0240 0.610 0.0226 0.5740 20.760
24 0.0220 0.599 0.0201 0.5105 26.170
25 0.0200 0.508 0.0179 0.4547 33.000
26 0.0180 0.457 0.0159 0.4039 41.620
27 0.0164 0.417 0.0142 0.3607 52.480
28 0.0148 0.376 0.0126 0.3200 66.170
29 0.0136 0.345 0.0113 0.2870 83.440
30 0.0124 0.315 0.0100 0.2540 105.20
31 0.0116 0.295 0.0089 0.2261 132.70
32 0.0108 0.274 0.0080 0.2032 167.30
33 0.0100 0.254 0.0071 0.1803 211.00
34 0.0092 0.234 0.0063 0.1600 266.00
35 0.0084 0.213 0.0056 0.1422 335.00
36 0.0076 0.193 0.0050 0.1270 423.00
37 0.0068 0.173 0.0045 0.1143 533.40
38 0.0060 0.152 0.0040 0.1016 672.60
39 0.0052 0.132 0.0035 0.0889 848.10
40 0.0048 0.122 0.0031 0.0787 1069.0
41 0.0044 0.112 0.0028 0.0711
42 0.0040 0.102 0.0025 0.0635
43 0.0036 0.091 0.0022 0.0559
44 0.0032 0.081 0.0020 0.0508
45 0.0028 0.071 0.0018 0.0457
46 0.0024 0.061 0.0016 0.0406
47 0.0020 0.051 0.0014 0.0356
48 0.0016 0.041 0.0012 0.0305
49 0.0012 0.031 0.0011 0.0279
50 0.0010 0.026 0.0010 0.0254
51 0.0009 0.0224
52 0.0008 0.0198
53 0.0007 0.0178
54 0.0006 0.0157
55 0.0006 0.0140
56 0.0004 0.0125

STANDARD WIRE GAGE SIZES

The table shows a list of standard wire sizes in the system known as the American Wire Gauge (AWG). The gage numbers specify the size of round wire in terms of its diameter and cross-sectional circular area.

NOTES:

1. As the gage number increases from 1 upward, the diameter and circular area decreases. Higher gage numbers indicate thinner wire sizes.
2. The circular area doubles for every three gage sizes. For example, gage number 10 wire has an approximately twice the area of gage no. 13 wire.
3. The higher the gage number and the thinner the wire, the greater the resistance of the wire for any given length.

CIRCULAR MILS.

The cross sectional area of a round wire is measured in circular mils.   A mil is a one-thousand of an inch, or 0.001 in. One circular mil is the cross-sectional area of a wire with a diameter of 1 mil.   The number of circular mils in any circular area is equal to the square of the diameter in mils.

TYPES OF WIRE CONDUCTORS

Most of wire conductors are copper, but sometimes silver and aluminum are also used, copper is tinned with a thin coating of solder, which gives a silvery appearance, the wire can be solid or stranded.  Stranded wire is more flexible and less likely to break open.  Sizes for stranded wire are equivalent to the sum of the areas for the individual strands. For instance, two strands of no. 30 wire are equivalent to no. 27 solid wire.

Types of capacitors and its circuit applications

A Capacitor is a passive two-terminal electrical device consisting of two or more conducting plates separated from one another by insulating material and used for storing an electric charge, capacitors are originally known as a condenser.  Aside from storing energy, a capacitor can also block the flow of direct current and permit the flow of alternating current and it can work to smooth out voltage fluctuations.

Electrical energy is stored in the capacitor between the conducting plates, with the external circuitry serving as the control mechanism for releasing the energy at the predetermined rate and time.  Whatever the physical construction of the device, the amount of electric charge  in coulombs (q) on the capacitor is directly proportional to the potential difference  in volts (V) between plates.

Capacitance (C) is the ability to store electrical charge, either with static electricity or by an electric current exhibits capacitance. Thus Capacitance is the measure of electric charge that can be stored per unit of voltage differential between the metallic conductors. The capacitance of a capacitor also depends on the size of the plates, their closeness together, and the nature of the material between them. In other words, it is directly proportional to the area of the plates and inversely proportional to the spacing between the two plates.

The unit of the capacitance is the “Farad” but because it is too large a unit for practical work, the MicroFarad (uF, one millionth of a Farad) and the Picofarad (pF, one millionth of a microfarad) are used. The higher the value, the more electrons the capacitor can store at any one time.

SOME APPLICATION OF A CAPACITOR:

BLOCKING DC VOLTAGES  – The passage of direct current can be blocked by capacitor.  When this happen, a circuit designer can isolate a circuit element from a dc supply. In this application, there is a choice of dielectric, each of which will allow a certain amount of leakage current caused by a random passage of electrons through or around the dielectric.

COUPLING AND DECOUPLING – capacitor block direct current and they also seem to pass alternating current.  Capacitor is charged and then discharged of current as the AC voltage alternates from one section of the circuit to another or different circuits.

BYPASSING  –  As both blocking and coupling functions are simultaneously done, a capacitor can separate the dc and ac components  of a mixed signal. To do a bypass function, the capacitor is put in parallel with the circuit element to assure that the dc portion does not appear on the circuit element.

FREQUENCY DISCRIMINATION  – the capacitor in this function is, as  in coupling function, employed to discriminate between signals. It should be recalled that the higher the capacitors capacitance value, the greater the current will be at any given frequency and that for a given capacitance, the higher the frequency, the more the frequency, the more current will be passed.

TIMING – The rate of charge that flows in and out of a capacitor is directly related to the capacitance (C) and the series of resistance (R) of the circuit. Thus, the selected R and C combination, otherwise known as time constant, determines the timing or speed of response of a circuit. On application can be seen in the time-delay relay.

SMOOTHING OUT VOLTAGES – Considering that unregulated power supplies are subject to transient peak and voltage surges (which can be damaging to the circuit components), capacitors are equipped with the ability to absorb these said peaks and pass on a steady voltage to a circuit. It is widely used to clean up voltage.

ENERGY STORAGE – capacitors can also be used to accumulate electrical energy from a low energy source over a long period of time. This is done by discharging the stored energy rapidly, allowing high current to perform tasks such as heating, welding or firing photoflash bulbs.

ARC SUPPRESSION – To reduce or eliminate interference caused by the rapid opening or closing of circuits (switches and relays), capacitor-resistor and capacitor-inductor combinations are used.  Such arching resulting from interrupting the current flow by such circuit radiate signal in the form of noise which can interfere with any broadcast reception. The capacitor can also prolong the life of the contacts of the switches and relays.

CAPACITOR WORKING VOLTAGE:

The working voltage or WV of a capacitor, is the maximum voltage that a capacitor can withstand before the dielectric layers in the component become damaged. At higher voltages, the current may simply arc between the plates. If a capacitor is inserted in a circuit with a higher input voltage than the indicated working voltage of the capacitor a spark may develop within the capacitor and punches through the dielectric material, leaving the component useless or shorted. As always it is a good idea to select a capacitor with a working voltage greater than the voltage in the circuit for safety.

TYPES OF CAPACITOR

he plate material in a ceramic capacitor is a silver compound that is fixed or deposited upon the surface of a dielectric. The dielectric is a ceramic form made of tantanium dioxide or a silicate compound which can be of disk or tabular shape. The overall capacitor assembly is coated with plastic material. Ceramic capacitor have a high dielectric constant that provides them with high working voltage ratings. That capacitance of these capacitors varies from 1 pF to 0.1 uF. They have a wider applications like filtering, coupling and decoupling, resonant circuit parameter and others.

PAPER CAPACITOR – It’s plates are made of aluminum or tin foil with a dielectric of paper that is impregnated (saturated) with an oil or wax compound. Such capacitors are non-polarized devices. Their capacitance range from 0.001 to 1 uf and their temperature coefficient is comparatively higher than those of the other types.

PLASTIC FILM CAPACITOR :These capacitors are manufactured from plastic films usually of the oriented crystalline type. The plastics used are thermoplastic films that have been extruded, stretched and heat treated. Moister has a little effect on the plastic films dielectric properties. This fact makes make the packaging of plastic film capacitors easier compared with other types. The electrical characteristics of these capacitors relate to the manufacturing process. There are 3 general classes of plastic film capacitors – polystyrene, polyester, and polycarbonates.

MICA CAPACITOR –several strips of metal foil, either aluminum, tin or copper, are sandwiched between thin sheets of mica which serve as the dielectric materials. Alternate strips of foil are connected to form the plate. These capacitors are found in the range of 1pF to 0.01 uF in capacitance and have a stable temperature coefficient characteristic. Its useful applications are in high frequency circuit.

ELECTROLYTIC CAPACITOR – These are capacitors whose dielectric layers are formed by an electrolytic method, and need not contain an electrolyte. The most common electrolytic capacitors are the aluminum electrolytic capacitors and tantalum electrolytic capacitors.

ALUMINUM ELECTROLYTIC CAPACITORS: consist of etched foils ( the anode and cathode foils) and paper separators rolled into a tabular form. During the assembly process, thin coating of aluminum oxide is deposited upon the surface of the anode foil and this coating becomes the dielectric material of the capacitor. The thickness of the oxide determines the working voltage rate of the capacitor which generally does not exceed 500volts.

TANTALUM ELECTROLYTIC CAPACITORS: Tantalum Capacitoruse tantalum metal foils and acid electrolytes. The oxide coating deposited upon the surface of their foils has greater dielectric constant than that of aluminum oxide. These capacitors are more rugged and have high temperature coefficient. However, their working voltage ratings are much lower compared with the first. Take note that both types of electrolytic are polarized devices that must be operated under Direct Current (DC) voltage condition. Their application ranges from consumer to entertainment.

VARIABLE CAPACITOR: This capacitor are also known as air dielectric variable (or tuning) capacitor. It consists of stationary plates (stator) and a set of a position that allows them to mesh with each other without touching. By rotating the shaft of this capacitor, the surface area directly opposite the stator plates varies, causing the capacitance to vary.